Ashutosh Bagchi

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Verified

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• Ph.D., P.Eng. FCSCE
• Professor at Concordia University

The risk-based approach has become the contemporary standard for evaluating the safety of existing dams, facilitating the effective planning of rehabilitation measures, and efficiently utilizing limited resources. This approach comprehensively considers various potential failure modes and estimates their failure probabilities from all plausible cau...

In order to ensure the safety of existing buildings constructed many years ago in zones with high seismicity, it is very important to consider and apply retrofitting measures. The seismic retrofitting of buildings can be achieved by techniques such as increasing the stiffness and ductility of the building and reducing the seismic demand. Energy dis...

One of the main goals of retrofitting reinforced concrete (RC) structures is to enhance their safety against natural disasters like earthquakes. A significant number of RC buildings in Canada were constructed several decades ago and may be vulnerable to earthquakes due to the absence of modern design considerations. Therefore, seismic retrofitting...

This study addresses the continuing concern for the safety of large dams worldwide, many of which are advancing beyond 50 years of service and approaching, or even exceeding, a century in operation. With over 61,000 such structures globally, the aging process characterized by slow, progressive, and irreversible deterioration poses significant threa...

Cross-laminated timber (CLT) is a panelized engineering wood product known for its strong and lightweight properties. Construction with CLT panels has been a growing trend to meet the low-carbon building alternatives. This study generates a reliable artificial neural networks (ANNs)-based model for estimating the flexural performance of CLT panels....

Bridges form an integral part of any highway and railway network. When the geometry cannot accommodate straight bridges, skewed bridges are often necessary for high-speed traffic and complex roadway alignments. This paper investigates the variations in the system response for skew decks of varying aspect ratios, considering standard vehicular loadi...

This simulation study explores the potential of a novel façade design with integrated control system comprising a dynamic photovoltaic (PV) facade integrated with dimming lighting control to enhance the work environment in office buildings and achieve energy-efficient solutions. Parametric modeling using the Grasshopper plug-in for Rhino software 7...

Purpose This paper introduces a novel multi-setup merging method and assesses its performance using simulated response data from a Finite Element (FE) model of a five-storey frame and experimental data from a cantilever beam tested in a laboratory setting. Design/methodology/approach In the research conducted at the Central Building Research Insti...

The coupled shear wall system is one of the effective potential options in midrise and high rise reinforced concrete buildings design. In seismic design consideration it is very important to ensure that the flexural displacement capacity which is known as ductility should be greater than flexural displacement demand. Non-linear dynamic analyses are...

This study explores the influence of uncertainties associated with ground motions on the fragility assessment of a concrete gravity dam. Aleatory uncertainty, inherent to natural processes, and epistemic uncertainty, arising from knowledge gaps, are crucial factors in ground motion selection. The Pine Flat Dam in California is used here as a case s...

Concrete gravity dams are an important component of modern-day infrastructure industry due to their diverse utilities. The structural analysis and health monitoring of these structures is extremely important as failure of these structures could lead to huge scale devastations. Seismic events have caused damage to multiple dams and thus analysis...

Large dams, integral to global infrastructure, confront a critical challenge of aging as many surpass the 50-year mark, and some approach a century in service. With over 61,000 such structures worldwide, ensuring the safety of aging dams has become a global imperative. This deterioration is exacerbated by Alkali-Aggregate Reaction (AAR), leading to...

The accurate determination of dynamic load effects is crucial for designing and assessing bridges, especially considering the increasing number of deteriorating bridges and ongoing construction projects. These effects are integrated into design through the Dynamic Amplification Factor (DAF), a ratio of the structure's dynamic response to its static...

In many developed countries, underground metros are a common mode of transport to reduce traffic congestion on the roads. Based on the soil profile and type, the depth of the underground metro tunnel varies with location. Construction and operation of a metro tunnel could induce vibration that could affect the performance of structures above the tu...

The popularity of log houses has been on the rise in numerous regions worldwide. In the context of log construction, the stability of log walls is notably influenced by the friction existing between the layers of logs and the openings designated for windows and doors. This study endeavors to comprehensively evaluate the lateral resistance of log wa...

The growing adoption of Building Information Modeling (BIM) within the architectural, engineering, and construction (AEC) sector raises questions about the quality of BIM data deliverables for project owners. Therefore, assessment and evaluation of such BIM data against relevant documents such as the BIM Execution Plan (BEP), the Level of Definitio...

Proper reinforcement detailing in plastic hinge regions is one of the important measures that could help damage control of structural walls subjected to any severe earthquake event. Inelastic curvatures are commonly assumed to be uniform over a height called plastic hinge length. Non-linear dynamic analyses are performed on a set of coupled shear w...

The use of fiber-reinforced polymer (FRP) in reinforced concrete structural elements has been gaining popularity in recent years as they are free from corrosion as opposed to the steel reinforcements. A lot of literature is available showcasing the advantages of FRP as reinforcement in concrete structures. In the present work, an experimental study...

This study addresses the vital issue of the variability associated with modeling decisions in dam seismic analysis. Traditionally, structural modeling and simulations employ a progressive approach, where more complex models are gradually incorporated. For example, if previous levels indicate insufficient seismic safety margins, a more advanced anal...

This article presents a two-dimensional spectral finite element formulation for dynamic analysis of concrete gravity dams. Finite element method (FEM) is the one of the most extensively used analysis tools for solving problems of dynamic analysis of structures. However, it needs extensive computational resources and time for large structures, leadi...

Sustainability in the building sector has evolved into a pivotal aspect, of constructing and maintaining buildings in the modern era. As awareness of environmental issues and resource depletion grows, the demand for sustainable building practices has surged. Several vital factors highlight the importance of sustainability in contemporary buildings:...

Structural Health Monitoring (SHM) and prognosis could play a crucial role in the life cycle of a critical infrastructure such as a large dam. Such monitoring practices serve multiple functions and are essential components in ensuring the safety and effective maintenance of such structures. By providing insights into a structure's behaviour, struct...

This research aimed to design a controllable multi-inlet Photovoltaic/thermal (PV/T) system with dampers to control system operation. For this purpose, five openings and two dampers were employed on a module of PV/T system. The developed steady-state numerical two-dimensional model of the proposed system is applied to evaluate three study models, o...

Structural health monitoring (SHM) is an integral part of modern-day engineering as it helps to take decisions on the state of the structure and suggest possible retrofitting measures. Dams are an essential component of civil infrastructure industry and failure of such large structures under seismic events could lead to huge scale devastations with...

Earthquakes can cause significant damage to constructed structures, leading engineers to design systems that effectively reduce damage and improve real-time vibration control. While base isolation is a commonly used passive method for seismic protection in highway structures, it has limitations such as a lack of immediate adaptation, constrained po...

To improve the performance of existing buildings, they must adhere to the current codes' new level of ductile design. It is crucial to accurately evaluate the lateral load resistance. To achieve this, a project was undertaken to model the wind load responses of typical 20 and 40-story reinforced concrete (RC) building frames. The study focused on L...

Unlike steel reinforcements in concrete, Fiber Reinforced Polymer (FRP) materials are light and free from corrosion. Therefore, FRP materials are increasingly being used in structural engineering as a replacement for steel reinforcements. While the use of FRP bars as longitudinal reinforcements in concrete deep beams has been studied somewhat widel...

Purpose The energy efficiency of buildings has been emphasized along with the continual development in the building and construction sector that consumes a significant amount of energy. To this end, the purpose of this research paper is to forecast energy consumption to improve energy resource planning and management. Design/methodology/approach T...

Nowadays, Rainwater has proven to be a prominent alternate water source after being efficiently harvested. On-ground implementation of the Rainwater Harvesting System (RWHs) at a community level in urban areas has always been challenging and requires technological advancement. To facilitate the implementation of RWHs, the proposed study provides a...

Nowadays, due to environmental changes, the condition of buildings can be in danger. In order to protect the performance of existing buildings, it is important to investigate the seismic behaviour of building structure subjected to earthquake excitation. In addition, it is important to study the advanced level of ductile design recommended by curre...

Steel bridges deterioration has been one of the problems in North America for the last years. Steel bridges deterioration mainly attributed to the difficult weather and environmental conditions. Steel bridges suffer mainly from fatigue cracks and Corrosion, which necessitate Frequent inspection. Visual inspection is the most common technique for st...

Control algorithms are an essential part of effective semi-active vibration control systems used for the protection of large structures under dynamic loading. Adaptive control algorithms, which are data-driven methods, have recently been developed to replace model-based control algorithms, thus improving efficiency. The dynamic parameters of semi-a...

Purpose This paper extends the authors’ previous research work investigating resilience for municipal infrastructure from an asset management perspective. Therefore, this paper aims to formulate a pavement resilience index while incorporating asset management and the associated resilience indicators from the authors’ previous research work. Design...

This research aimed to design a controllable multi-inlet Photovoltaic/thermal (PV/T) system with dampers to control system operation. For this purpose, five openings and two dampers were employed on a module of the PV/T system. The proposed system's developed steady-state numerical two-dimensional model is applied to evaluate three study models, on...

A modern city faces many challenges, such as maintaining bridges in harsh climates for snow removal and the power supply required for bridges. For the anti-icing, deicing, and anti-compaction of snow on the bridges, the applications of salt and sand or other gritty material have been used, which can damage the bridge structure. Infrastructure Inte...

Due to the excessive use of disposable face masks during the COVID-19 pandemic, their accumulation has posed a great threat to the environment. In this study, we explored the fate of masks after being disposed in landfill. We simulated the possible process that masks would experience, including the exposure to sunlight before being covered and the...

Transportation of prefabricated modules is a critical process in modular construction and can cause additional stresses which may damage individual modules, leading to additional costs and time during the installation and operational phase if damaged parts are not timely restored or replaced. Therefore, utilizing a tracking and condition monitoring...

After the sustainability of heritage buildings (HBs) has been evaluated and it is determined that rehabilitation is needed, then the life-cycle cost (LCC) of energy for HBs can be analyzed. The objective of this research was to evaluate the LCC of energy for HBs and develop a comprehensive life-cycle model that will aid in expenditure planning and...

The concept of Structural health monitoring (SHM) as we know today emerged around the late 1980s. The idea of SHM draws parallel to the human health monitoring and classical medical checkup and diagnosis; and it employs sensor-based monitoring and control (monitoring) of engineering structures. The International Society of Structural Health Monitor...

The sustainability of housing is a main issue in the modern world. The United Nations has espoused sustainable development goals to ensure that the resources are applied appropriately and that society can increase. This research will not only contribute to the general goal of sustainability for societal benefit but also improve the sustainability a...

Heritage sites and buildings are very important for the society and the need for their conservation is becoming increasingly urgent. The unique nature and the significant value of the heritage buildings have created the need for standard unified methods to be used in local heritage building rehabilitation projects. This will allow such important bu...

Optical fibers can be used as sensors to measure strain, temperature, pressure and other quantities and they can help to make informed decisions and collect data in 75% less time than traditional sensors. So, this paper indicated the definition of Structural Health Monitoring (SHM), Optical fibers advanced materials, What are optical fibers made of...

The purpose of the bridge's Structural Health Monitoring (SHM) system is to assist and inform operators about the continued suitability of structures in light of the changes that may occur either gradually or suddenly as they perform their various tasks. Ensuring the integrity of the structure is vital and important, as well as having the ability t...

1 ABSTRACT: This article presents a study on the structural behavior of FRP-RC beams and the instrumentation systems under fatigue and different weathering conditions. Twelve beams were designed, cast, and after 28 days, subjected to pre-cracking. This pre-cracking was designed to simulate the expected flexure cracks in service and to enhance the e...

One of the main components of a bridge management system is the bridge deck which has a shorter service life than that of the other elements. There are many Non-Destructive Evaluation (NDE) techniques available for bridge condition assessment. Among them, Ground Penetrating Radar (GPR) is commonly used in bridge deck condition assessment. For a giv...

In recent decades, the use of ground-penetrating radar (GPR) in non-destructive evaluation (NDE) of structures has increased significantly due to its ability to detect subsurface defects in a short duration. This paper investigates the signal attenuation of GPR signals using an image processing factor, entropy, and compares it with the widely adopt...

Current generation of Performance-based Earthquake Engineering (PBEE) approach developed at the Pacific Earthquake Engineering Research Center (PEER) or PEER-PBEE is a state-of-the-art approach to predict seismic loss estimation of buildings in terms of repair cost, downtime and other decision variables among the performance-based earthquake engine...

Structural Health Monitoring (SHM) and prognosis serves numerous functions and remain vital components over the entire life cycle of a large dam or such other critical infrastructure. The instrumented health monitoring provides insight into the behaviour of a structure, assisting in numerical model calibration and complements to visual inspection....

Damage localization of concrete gravity dams is challenging due to the enormous size of the structure. The computational aspect is challenging as it requires huge computational time, space, and advanced computational tools. Moreover, the modal parameters like frequencies and curvature mode shapes, though effective in identifying the presence of dam...

Heritage buildings require special attention because of their unique architectural style. Due to the lack of rating systems designed for heritage buildings, this paper presents an assessment tool that considers specific characteristics of heritage buildings. The utilized rating systems worldwide are identified, studied and compared to test their ad...

Heritage buildings (HBs) are unique and must be maintained for future generations. In light of the need for their conservation and limited maintenance funds, this article aims at creating sustainability-based assessment of heritage buildings. In the developed model, fuzzy analytical network process is deployed to derive the corresponding weights of...

Canada has a rich and diverse architectural heritage around its provinces. The Canadian government has paid great attention to the preservation, rehabilitation, and maintenance of heritage sites and buildings. The Director of Heritage Facilities and Installations plays a major role in heritage preservation, given his full knowledge on the maintenan...

Fiber optic sensors have been increasingly utilized in structural health monitoring of large-scale civil structures. Bare fiber sensors are quite brittle, and therefore, their installation and embedment in reinforced concrete elements can be challenging, particularly when using uncommon materials as internal reinforcements in concrete. In the prese...

Ground-Penetrating Radar (GPR) is a popular non-destructive technique for evaluating RC bridge elements as it can identify major subsurface defects within a short span of time. The data interpretation of the GPR profiles based on existing amplitude-based approaches is not completely reliable when compared to the actual condition of concrete with de...

With population migration towards urban areas, cities are becoming dense and are experiencing a lack of adequate green areas. Widespread vegetated roofs, called green roofs, are becoming a popular option for sustainable design. Green roofs are capable of improving a variety of environmental parameters in urban areas. The construction of green roofs...

Heritage buildings are significant historical and architecture added value, which requires deep and precise preliminary brainstorming when considering upgrading or retrofitting these valuable buildings. In this study, we opted to highlight some passive design architecture interventions to improve the thermal comfort and the required cooling energy...

Purpose The purpose of this research is to focus on the evaluation of heritage buildings' sustainability. BIM modeling was necessary for the design of the sustainability assessment model for Heritage Buildings (SAHB). Using ArchiCAD®, energy simulations were performed for two case studies (Murabba Palace, Saudi Arabia, and Grey Nuns Building, Canad...

In typical solar-assisted Solid Desiccant Cooling (SDC) systems, the processed air exhausted after the Sensible Wheel (SW) corresponds to wasted useful energy. By using the exhausted air from SW as input to the solar collector, further improvements in the system's thermal Coefficient of Performance (COPth) and unmet hours can be achieved. This rese...

Purpose The study investigates the performance of a three-story unprotected steel moment-resisting frame (SMRF) designed for high seismic demand in the fire-only (FO) and post-earthquake uniform and traveling fires (PEF). The primary objective is to investigate the effects of seismic residual deformation on the structure's performance in horizontal...

Heritage buildings are historically exceptional in their landscape and specific attention must be paid to their architectural element and components. Recently, the techniques that are utilized for the study and protection of cultural heritage have been on the rise in the research field. Studies have shown that project life cycle phases can be imple...

Heritage buildings require special attention because of their unique architectural style. Due to the lack of rating systems designed for heritage buildings, this paper presents an assessment tool that considers specific characteristics of heritage buildings. The utilized rating systems worldwide are identified, studied and compared to test their ad...

Heritage buildings are historically exceptional in their landscape and specific attention must be paid to their architectural element and components. Recently, the trends of protection and use of heritage buildings and cultural heritage components testify to increasing attention in the study of heritage and legacy. Studies have shown that project l...

This article presents a study on the seismic performance of reinforced concrete shear wall buildings with focus on shear strength of walls that are designed using the seismic design provisions of the National Building Code of Canada. A set of buildings, four, six and eight storeys with a simple configuration and different heights have been consider...

India has more than 5500 large dams with an average age of 40 years. Assessment of dam health is the primary step towards the sound management of these existing national assets. With an innumerable number of uncertain factors involved, a multidisciplinary approach is essential to assess the health of dams with a reasonable level of accuracy. Such a...

Various risks significantly influence pricing of bids and a wide range of factors impact bid pricing risks. Of these, client’s reputation and the record of projects owned by a client have vital contribution on the issue. Current practices however fail to capture the impacts of client-related factors. There is a need for developing a practical quant...

The oily waste generated from the cleanup operations during shoreline spill response can result in challenging environmental and socioeconomic problems. In this study, an inexact inventory-theory-based optimization model (ITOM) for oily waste management during shoreline spill response was developed to support the spill management team. The most app...

Purpose To mitigate the problems in sensor-based facility management (FM) such as lack of detailed visual information about a built facility and the maintenance of large scale sensor deployments, an integrated data source for the facility’s life cycle should be used. Building information modeling (BIM) provides a useful visual model and database th...

The Friction Damped Bracing System (FDBS) is able to significantly control the vibration of framed structure without dissipating energy through the inelastic yielding of its structural components. Therefore, it is a useful tool to design the structural system by isolating the energy dissipation components at some specific as well as desired locatio...

A comfortable thermal indoor environment is crucial for occupants’ well-being and productivity. Building Management System (BMS) is usually used to monitor the thermal condition of buildings. One of BMS’s main challenges is in the data visualization stage, in which 2D vector graphics are used, which is not fully interactive and can only be manipula...

Purpose-Heritage buildings are significant for their historical and architectural value. Due to the lack of rating systems designed specifically for heritage buildings, it is essential to develop and validate a heritage building assessment tool that considers its specific characteristics. The purpose of this study is to provide an extensive review...

Criteria weights formulation is the most essential component of a multi-criteria prioritization scheme. The research reported in this paper sought to critically compare a recently developed multi-criteria optimization criteria weights method to the well-known Analytic Hierarchy Process (AHP) as well as the method employed by the bridge management s...

The unique nature and the significant value of the heritage buildings have created the need for standard unified methods to be used in local heritage building rehabilitation projects. This will allow such important buildings to fit in their own geographical region or policy. This research identified and reviewed three main aspects concerning herita...

Purpose: Heritage buildings are significant for their historical and architectural value. Due to the lack of rating systems designed specifically for heritage buildings, it is essential to develop and validate a heritage building assessment tool that considers its specific characteristics. The purpose of this study is to provide an extensive review...

A Solid Desiccant Cooling (SDC) system requires low-temperature heat, which can be supplied using a Photovoltaic Thermal (PV/T) collector. However, the increase in PV/T outlet air temperature is limited by PV surface temperature. Therefore, an auxiliary heater is needed to meet the required regeneration temperature, but high auxiliary heater energy...

According to Canada Infrastructure Report 2016, 62.6% of roads in Canada are in a good condition, nevertheless, with current investment rates, significant road networks will suffer a decline in its condition and will be vulnerable to sudden failure. Accordingly, this paper tackles the pavement resilience from an asset management perspective and aim...

Researchers have proposed various methods to scale ground motions. In this paper, different methods developed by researchers for ground motion selection and scaling purpose are discussed. It is observed that irrespective of the selection and scaling approach, the final objective of all the methods is to scale the ground motions such that they match...

Vibration-based Operational Modal Analysis (OMA) is essential to estimate modal parameters of an operational structure. Estimating modal parameters is important to assess structural health and remaining service life of a structure. Using ambient response of a structure is challenging to utilize such response for calculation of modal parameters due...

The concerns about the seismic safety of dams have been growing globally during recent years, intending to reduce the potential hazard to life, economy, and environment during the extreme seismic events and to ensure operational safety for the most anticipated earthquakes. The post-seismic structural damage of the dam may result in an uncontrolled...

The essentiality of Vibration-Based Damage Identification (VBDI) in monitoring the health of civil engineering structures has been highly emphasized by a considerable amount of studies. The more precise a VBDI method would become, the more efficient the data management system would be essential to be devoted to it. However, due to neglecting the es...

Identifying the variation in Modulus of Elasticity (MoE) of concrete is essential to comprehend the state of functionality of the concrete structural system. At different stages of service life, from construction to the demolition or restoration, the structure needs to be monitored so that any anomaly in the strength of the structure, whether due t...

Identification of the behavior of structural system and the monitoring of its structural health is essential for any smart and sustainable city. Montreal being one of the premier urban destinations situated at one of the extreme locations on earth, calls for such facilities to have installed for its important structural systems to obtain real-time...

There are large number of heritage buildings across the world. Heritage buildings are historically unique by nature and require specific attention to their architecture. Current trends of protection and use of heritage buildings and cultural heritage components testifies to an increasing attention of the study of heritage and legacy. The literature...

Heritage buildings are historically unique by nature and require specific attention to their architectural element. Due to the lack of the rating systems that have designed specifically for heritage buildings, it is essential to develop and validate a heritage building assessment tool that considers its specific characteristics. The utilized rating...

Energy consumption in buildings constitutes a significant portion of the total energy demand in Canada (about 40%). While the design and construction of energy efficient buildings are gaining momentum, it is important to have an integrated process for the design. The present article focuses on the integrated design process at the conceptual phase t...

Continuous monitoring of large-concrete structures like Dam, using information obtained using the health monitoring system, is necessary for the prognosis of its premature degradation. In this study, Koyna dam, is modeled in 2D using ABAQUS software. Material properties of the dam material are assumed to be linear and elastic. The model is first va...

In last few decades, vibration-based Structural Health Monitoring (SHM) has played a significant role to study different parameters of a structure. Frequency Domain Decomposition (FDD) plays important roles to identify system properties, such as: modal frequencies, mode shape and damping ratio. The focus of the present research is to identify modal...

Fiber-optic sensors (FOS) are increasingly being used in reinforced-concrete (RC) structures for their accuracy and durability. One of the drawbacks of FOS is their fragility at installation. One recently-developed method to address such deficiency is to install the FOS on a short bar (supplemental bar) that is rigidly connected to the structural r...

Fiber-optic sensors (FOS) are increasingly being used in reinforced-concrete (RC) structures for their accuracy and durability. One of the drawbacks of FOS is their fragility at installation. One recently-developed method to address such deficiency is to install the FOS on a short bar (supplemental bar) that is rigidly connected to the structural r...

Modular buildings or off-site construction of building units are increasingly gaining momentum. Although such construction practices have advantages in terms of cost competitiveness and delivery time, they have many issues related to structural integrity and secondary stresses from vibration during transit and misalignment during installation. Ther...

Fiber-optic sensors (FOS) are increasingly being used in reinforced-concrete (RC) structures for their accuracy and durability. One of the drawbacks of FOS is their fragility at installation. One recently-developed method to address such deficiency is to install the FOS on a short bar (supplemental bar) that is rigidly connected to the structural r...

This vibration-based method for Structural Health Monitoring (SHM) utilizes the dynamic response of a structure measured using a set of sensors to identify the modal properties and potential structural damage. Signal processing tools are widely used for analyzing and diagnosing these response signals. Change in the dynamic characteristics of a stru...

With the prolific usage of vibration analysis to extract information about different structures (buildings and bridges etc.), vibration sensors have become an important device in Structural Health Monitoring (SHM). We tried to modify the sensor systems with a concentration on the analog subsystem sensors. Different types of seismic sensors with dif...