Seismic Analysis - Science topic

Despite the widespread use of single-segment columns with grouted sleeves, multi-segment columns with Ultra-High Performance Concrete (UHPC)-based grouted sleeve connections represent an innovative approach to enhance the adoption of prefabricated structures in seismically active areas. This study aims to assess their seismic performance through a...

IFMIF-DONES (International Fusion Materials Irradiation Facility-DEMO Oriented Neutron Source) will be a unique facility dedicated to the irradiation of fusion materials by means of a high neutron flux, with a spectrum comparable to the one expected in the first wall of fusion reactors. Due to the moderate seismicity in southern Spain, the IFMIF-DO...

Purely compressed shells are often elegant and highly efficient structural forms, but this leanness may create risk if they are subjected to unexpected patterns and magnitudes of loading, such as may arise due to seismic events. In the same way that historic masonry structures were designed to sustain loads by activating purely compressive force pa...

As the depth of coal mining increases, seismic events pose a serious threat to mine safety, and studying the rupture mechanism helps to better understand the occurrence of mine-induced earthquakes. In this paper, we propose a new model, Graph-Fully Convolutional Focal Mechanism Network (GFFMNet), based on Graph Convolutional Networks (GCN) and Full...

This study presents an integrated approach for the seismic assessment of the 13th-century San Michele Arcangelo Cathedral Bell Tower in Caserta Vecchia, Italy, utilizing a detailed photogrammetric survey and Finite Element (FE) modelling. The analysis focuses on the structural vulnerability and seismic response of the historical masonry tower to as...

This paper evaluates seismic design considerations for a typical reinforced concrete (RC) building in Albania, comparing the provisions of Eurocode 8 (EC8) and the Albanian seismic code, KTP.N2-89. The primary focus is on the design spectra, analyzing differences in site coefficients, spectral shapes, and the inclusion of near- and far-field seismi...

Ring foundations are emerging as a prominent choice of civil engineers on account of being a cost-effective and sustainable alternative to comparable circular footing. Most of the existing studies have evaluated the performance of ring foundations under static conditions in homogeneous soil presenting a slight deviation from the dynamic complexitie...

Changes in pore pressure within geological reservoirs, due to, e.g., hydrocarbon production, CO2 and energy storage, or wastewater disposal, may cause substantial stress changes in the overburden, altering propagation velocities of elastic waves. The corresponding time shifts are detected and quantified using time-lapse (4D) seismic analysis. To in...

Due to the geological formation of Bangladesh, it is showing the threat of earthquakes. As the number of high-rise buildings is increasing daily, there is an urgent need to design structures considering seismic loading. During earthquakes, structures are subjected to lateral displacement. Most reinforced concrete structures are designed to resist g...

Seismic capacity demands continuous detailing in response to its focal function in structural health monitoring. While modern methods in engineering technology and artificial intelligence have been meeting those demands, the unpredictability of natural events, such as earthquakes, requisites progressive preparations. Although instruments and models...

The seismic assessment of existing unreinforced masonry structures is particularly complex. Defining the correct modelling assumptions is essential when using global models to ensure valid results. Achieving this often requires the collaboration of a group of stakeholders with diverse backgrounds who can thoroughly study the structure under conside...

No projeto de estruturas sismo-resistentes, a característica mais importante é o histórico no tempo das acelerações do sismo. Essas acelerações são utilizadas para estimar as ações sísmicas por diferentes métodos, que podem ser estáticos ou dinâmicos, e que variam de complexidade em função da grandeza dessa aceleração. Localizado na região central...

There is rapid emersion of the new technologies related to safe, economical, stable construction. In such a trend, earthquake has become one of the natural challenging factors for the efficient construction works. Every country has specific building design codes which provide the standards to engineers for the design of various structural component...

For the assessment of seismic effects on RC buildings, the real structural condition has to be modelled as accurately as possible. Medical facilities and hospitals have to resist seismic actions and remain operational after seismic events. For this reason, a detailed seismic vulnerability assessment of a hospital building located in Orihuela, Spain...

This study introduces the Intelligent Hybrid Global Optimization (IHGO) algorithm to improve the predictive accuracy of neural network models for estimating the fundamental period of vibration in masonry-infilled reinforced concrete (RC) frame structures. Using a dataset of 4,026 entries, which includes critical structural parameters such as the nu...

Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures worldwide. An understanding of the liquefaction triggering, and the post-failure large deformation behaviour is essential for designing resilient infrastructure. The present study develops a Smoothed Particle Hydrodynamics (SPH) framework for ea...

Water tanks are essential components of water supply networks, providing storage and maintaining pressure. Their structural performance is particularly critical following earthquakes to ensure continued water supply for firefighting and other emergency needs, and to prevent environmental damage. This study focuses on the seismic analysis of aerobic...

Estimating the resilience of civil infrastructures is crucial for disaster prevention (i.e. earthquakes), encompassing both above-and underground constructions. However, while below-ground infrastructures are generally acknowledged as less vulnerable than their over-ground counterparts, this aspect has not yet garnered widespread attention. Thus, n...

Three-dimensional seismic analysis of large tunnel alignments using the continuum (Finite-Element; FE) modelling technique can be computationally expensive. This is due to the extended length of tunnels compared to their diameter (which controls the local ground-structure interaction and hence, the required maximum FE element size). Such models can...

A generalized analytical method and an efficient numerical solution procedure are developed for the nonlinear seismic analysis of base-isolated multistory buildings. In the analytical development, while the superstructure is modeled as a linearly elastic system with rigid diaphragm at each floor level, the seismic isolation system of laminated high...

Worldwide buildings are collapsing due to ground movement along with seismic oscillations, which is responsible for spare loss of life and property. Bangladesh lies on one of the active tectonic plates. This research aims to determine the most appropriate seismic-resistant solution for reinforced cement concrete (RCC) buildings in Bangladesh's seis...

The utilization of bracing frames to mitigate lateral forces in high seismic regions is strongly recommended due to the potential for seismic events to inflict catastrophic structural damage and result in loss of life. Consequently, there exists a pressing need to investigate the integrated relationship between chevron and X braced frames, and infi...

Scattering of elastic waves causes velocity dispersion, which increases uncertainty in seismic analysis. Understanding the sources of scattering and the degree of velocity dispersion are critical to improve subsurface imaging in efforts to locate resources and study subsurface processes. In addition to scattering, other mechanisms, such as the wave...

This paper describes the nonlinear dynamic seismic response of a thirty-six-story reinforced concrete U-shaped coupled core wall building using the Beam-Truss Model for the vertical elements of the lateral force-resisting system. The case study has three basements, eight podiums, and twenty-five tower levels, with eccentricities on every floor. Ele...

I’ve developed a MATLAB code and user guide for analyzing earthquake data, specifically based on time-acceleration data, to calculate key seismic parameters such as: Peak Ground Acceleration (PGA) Peak Ground Velocity (PGV) Peak Ground Displacement (PGD) The code processes this data to generate time-history plots for acceleration, velocity, and di...

Seismic risk assessment is inherently complex, involving the integration of seismic analysis, structural vulnerability, and socio-economic impacts of earthquakes. This study presents findings from a non-linear seismic analysis of concrete gravity dams, a critical aspect given the extensive experience of existing dams with significant seismic activi...

This research paper investigates the seismic attributes utilized for the interpretation of structural features within the Rio do Peixe Basin (RPB). Employing the OpendTect software, we conducted a comprehensive seismic analysis that included data conditioning and the application of various seismic attributes to enhance the visualization of geologic...

In this study, a novel model for soil-structure interaction analysis in seismic zones is developed using artificial intelligence methods. Soil-structure interaction (SSI) is a critical factor influencing the seismic response of structures, yet it remains challenging due to the complexities associated with soil parameters and structural behavior und...

This work uses the frequency-magnitude relation for the earthquakes to analyze seismicity and return period for the earthquakes in Makran subduction and its adjacent region. The data for seismicity analysis and return period range from 1934 to 2022, with moment magnitude and depth ranging from 4.0 to 8.1 and 0 to 115 km. The b-values for eastern an...

This study proposes a method for predicting the seismic response of structures using seismic information and structural properties. In the proposed method, the relationship between seismic and structural characteristics and seismic responses was investigated using a convolutional neural network (CNN) to predict the seismic response. Spectral accele...

Seismic performance assessment of structures is a critical requirement for ensuring their resilience against earthquakes, particularly for masonry-infilled reinforced concrete (RC) frames that are widely used in construction. The presence of masonry infill significantly influences the overall behavior of RC frames under seismic loads, both in terms...

The Azores Triple Junction offers a unique opportunity to investigate the interplay between volcanism and tectonic activity. After 60 years of quiescence in São Jorge Island, in March 2022, the island experienced a volcano-tectonic unrest, accompanied by widely felt earthquakes and surface deformation. We conducted an extensive study of this anomal...

This paper aims to examine the seismic response of prestressed self-centering moment-resisting frames (PSC-MRFs) based on concrete-filled double steel tubular (CFDST) columns and RC beams. The beam of this novel connection is divided into two parts, connected by bolts and tendons, and the beam includes a gap opening feature, which could be regarded...

The portal method is one of the common approximate methods in the analysis of statically indeterminate structures. This method is used to analyze the frames which subjected to lateral loadings such as wind, earthquake, and blast loadings in Zone Case Study. The portal method is still used in the planning phase of projects, preliminary designs, and...

The seismic performance and expected structural damage in reinforced concrete (RC) frames, as in many others, is a critical aspect for design. In this study, a set of RC frames characterized by increasing in-plan and in-height non-regularity is specifically investigated. Four code-conforming three-dimensional (3D) buildings with varying regularity...

Se presenta las experiencias del Dr. Roberto Aguiar Falconí, en el diseño de estructuras en el Ecuador; asociadas a los nuevos bloques estructurales de la Universidad de Fuerzas Armadas ESPE, que tienen aisladores de triple péndulo de fricción. En ésta presentación se acopian 3 conferencias dictadas, en diciembre de 2023, enero y febrero de 2024, e...

Se presenta el diseño a flexión y corte de vigas de acero, de acuerdo al Capítulo F del ANSI AISC 360-22. Hay dos aspectos fundamentales en el diseño de vigas de acero y son la compacidad de los elementos, para que la estructura tenga ductilidad y estén en capacidad de llegar al momento plástico. El otro aspecto tiene que ver con la separación de l...

In this study, we have investigated the reflection of plane quasi-P (qP), quasi-SV (qSV) and quasi-SH (qSH) waves at the stress-free boundary of an initially stressed nonlocal triclinic half-space. Closed-form mathematical expressions for the phase velocity, reflection coefficients and energy ratios are derived which provide a comprehensive underst...

In August 1976, within a week, three earthquakes with a magnitude of 6.5 or higher occurred at the border of Songpan County and Pingwu County in Sichuan Province, China. The seismogenic structure of the three earthquakes is the Huya Fault. The Huya Fault is still a strong active fault, and there is still a possibility of major future earthquakes in...

We performed a series of hydraulic stimulations at 1.1 km depth in the Bedretto underground laboratory, Switzerland, as part of an overall research strategy attempting to understand induced seismicity on different scales. Using an ultra‐high frequency seismic network we detect seismic events as small as Mw < −4, revealing intricate details of a com...

The objective of this study is to examine the dynamic response behavior of a long-span cable-stayed bridge with ultra-high piles subjected to near-fault ground motions, comprehensively considering deep-water, sedimentation, local site, and wave-passage effects. Firstly, a 3D finite element (FE) model of the long-span cable-stayed bridge with ultra-...

The construction of high rockfill dams on deep overburden in seismically active regions poses significant challenges. Currently, there are no standardized guidelines for defining the computational domain range in seismic analysis, necessitating the establishment of a universally applicable computational domain range that optimizes the balance betwe...

This article proposes an advanced nonlinear soil-structure interaction methodology, for the seismic analysis of a nuclear structure. To do so, a study is performed on a nuclear reinforced concrete structure considering the effects of the nonlinearity due to the sliding and rocking at the soil-structure interface, under a Beyond Design Basis Earthqu...

In this paper, a masonry bridge is simulated in order to assess both its structural and seismic vulnerability. Therefore, the present study aimed to approximately analyze the real behavior of Mikron Bridge structure. The modeling was conducted by combining the finite element method (FEM) and discrete element method (DEM) using the ABAQUS® software....

Rockbursts have become one of the most serious hazards in underground mines worldwide. While the characteristics of ground motions before rockbursts (or high-magnitude events (HMEs)) have not been studied. In this study, the peak ground velocity (PGV) and cumulative absolute displacement (CAD) before HMEs were examined based on seismic monitoring i...

In this paper, a masonry bridge is simulated in order to assess both its structural and seismic vulnerability. Therefore, the present study aimed to approximately analyze the real behavior of Mikron Bridge structure. The modeling was conducted by combining the finite element method (FEM) and discrete element method (DEM) using the ABAQUS® software....

The main objective of the paper is to emphasize and understand the main changes that are incorporated in the second generation of Eurocode 8 and to analyze the influence of the change in the seismic hazard definition and the ductility class on the response of certain reinforced concrete structural members. For this purpose, a reinforced concrete re...

Continuing the structural analysis until the model reaches its ultimate capacity using an incremental nonlinear time history analysis can incorporate all the behavioral complexities of the structure. This approach ensures that all factors influencing the seismic behavior of structures, which can be simulated in numerical modeling, are fully conside...

The lever or the lever-type mechanism can achieve an inertia amplification effect by appropriately calibrating its structural configuration, and it is also proven to be one of the most cost-effective solution for the inerter realization compared with other mechanical devices. Benefitting from this property, the present paper adopted a new type of t...

Bearings are the weak link in the seismic design of bridges. Using a continuous girder bridge as an example, it is demonstrated that bearing damage should be considered under large earthquake conditions. The bearing, acting as a fuse-type unit, can be designed to be preferentially damaged to effectively control the displacement of the beam and the...

A R T I C L E I N F O Keywords: Bridge abutments Soil-abutment interaction Bridge-abutment interaction Seismic analysis Soil-structure interaction Sub-structure approach A B S T R A C T The paper proposes a methodology for assessing the seismic soil-foundation-abutment response in the spirit of the sub-structure approach. The methodology is suitabl...

Reinforced concrete (RC) building construction remains predominant in Northern Cyprus, offering resilience against natural disasters when appropriately designed and implemented. The study presents a seismic analysis of RC building models across different soil classes, stories, and configurations, according to multiple seismic design codes: Eurocode...

The core of this study is the comparative analysis of I S. 1893 (Part One): 2016 Edition (Code for Seismic Design of Structures) and I S. 16700:2017 (Code for Safety of High rise Concrete Building Structures). In addition, the study aims to uncover the key factors that contribute to poor performance of buildings in earthquakes, with the aim of impr...

Seismic events have shown to be exceedingly damaging to structures over time, with serious social and economic consequences. As a result, large-scale seismic risk assessments are essential for reducing the potential damage from future earthquakes. Therefore, the proposed study attempts to examine the vulnerability and risk of unreinforced masonry b...

En este estudio se evaluó el comportamiento sísmico de las conexiones soldadas RCFT en estructuras de acero, según las normativas NEC-15 y AISC 360-16, mediante simulaciones numéricas y ensayos experimentales. Utilizando el software ETABS, se desarrollaron tres modelos estructurales que permitieron analizar la distribución de tensiones, deformacion...

This study focuses on the 2D and 3D nonlinear seismic damage analysis of a proposed concrete gravity dam using the finite element program ABAQUS, employing the concrete damaged plasticity model. To compare the 2D and 3D analyses, four different cases of the dam's spillway section are simulated. Initially, a frequency analysis is performed to estima...

In the current seismic analysis of high-speed railway track–bridge structures, the constitutive parameters of track lateral blocks (TLBs) are not uniform. A finite element model of the TLB’s main beam is established, which considers concrete plastic damage, interface bond between old and new concrete, and bond slip between anchorage steel bars (ASB...

Many civilizations have ruled in Mesopotamia since the earliest times of history. The historical heritage of these civilizations should be preserved and passed on to future generations. The Nebi Mosque is one of the oldest and the most remarkable mosques in Mesopotamia, still functional in Diyarbakir, a city in Turkey. The mosque dates back to the...

A bridge is a crucial building element needed for the transportation system however, due to the site characteristics, it is never feasible to build a standard bridge. A skew construction is required if the alignment of the road is not perpendicular or crosses the river at an angle different than 90 degrees. A skew bridge is a bridge that is built o...

An unexpected major tsunami from the region near Sofu Seamount was observed on 8 October 2023. Sofu Seamount is located approximately 600 km from the coast of Japan. Due to far epicentral distances and the successive occurrence of seismic events, the conventional seismic analysis to reveal the accompanying seismic sequence cannot work well. We inve...

The performance of various geogrid earth-retaining walls integrated with a non-cohesion granular backfill for reducing earth pressure has been investigated through small-scale shaking table tests and full-scale 3D finite element analysis. This purpose involved a series of physical modeling tests involving different earth-retaining walls (0.83 cm, h...

We invite applications for a Postdoctoral Researcher position at the School of Marine Science and Engineering, South China University of Technology (SCUT), ranked #187 in the US News 2024 rankings. The successful candidate will join an innovative research project titled: “Seismic Analysis of Offshore Wind Turbines Considering Soil-Foundation Intera...

The choice of an appropriate response reduction factor (R) in the seismic design of a reinforced concrete building is crucial to the building's seismic response. Static non-linear pushover analysis is used to achieve this target by figuring out the building's actual stiffness. Sometimes designing a building with a vertical combination of several la...

This study provides a detailed seismic interpretation of the Bahariya and Kharita formations in the Alfadl and Al-Qadr Fields, located in the Northeast Abu Gharadig (NEAG) Basin, Western Desert, Egypt. Through seismic data analysis, the subsurface structures of the Kharita (Lower Cretaceous, Albian) and Bahariya (Upper Cretaceous, Cenomanian) forma...

The accurate modelling of structural dynamics is crucial across numerous engineering applications, such as Structural Health Monitoring (SHM), seismic analysis, and vibration control. Often, these models originate from physics-based principles and can be derived from corresponding governing equations, often of differential equation form. However, c...

To mitigate the effects of earthquakes on structures, several vibration control devices have been developed. Among them, the tuned mass dampers have shown to be effective in reducing the seismic response of structures. The main goal of this study is to propose optimal design parameters of tuned mass dampers mounted on rubber isolators, in order to...