Mahmood Hosseini

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Verified

Mahmood verified their affiliation via an institutional email.

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• PhD in Structural Dynamics and Earthquake Engineering
• Professor (Full) at Eastern Mediterranean University

Metallic dampers are a common energy-dissipating tool in structural engineering. Meanwhile, these dampers have a disadvantage compared to viscous rivals, as the yielding force must be exceeded to activate the device, limiting their effectiveness across a range of potential events. Multi-level control can be employed as a way of addressing this limi...

Bracing systems have been essential for lateral load resistance in buildings but are limited by low energy dissipation and susceptibility to buckling under compressive loads. Yielding dampers have been introduced to enhance these systems, but they often suffer from asymmetrical behavior in tension and compression, complex manufacturing, and difficu...

This study introduces a novel ‘multi-mushroom’ structural system designed to improve seismic performance in lowrise buildings. Traditional low-rise structures tend to favor sliding over rocking due to their smaller aspect ratios despite the rocking system’s superior seismic response reduction. Rocking designs allow structures to pivot at their base...

This review paper delves into the innovative realm of self-healing concrete as a sustainable solution in the construction industry. The study aims to differentiate itself by critically examining the development and application of self-healing concrete, particularly focusing on its capacity to autonomously repair cracks and microfractures, thereby e...

So far, several studies have been conducted on progressive collapse of tall buildings, of which a few have been on the buildings with diagrid structures, however, in none of them the effect of the building’s plan geometry has been a concern. In this study the progressive collapse of a set of 50-story steel buildings with diagrid structures in three...

Near-field earthquakes have been shown to have different effects on structures than far-field events. This study examines the dynamic response of a rectangular concrete liquid storage tank with tapered walls to near-field ground motions, with particular emphasis on the effect of higher sloshing modes. The tank’s numerical modeling, calibrated using...

In urban environments, in many cases, buildings with unequal story plan sizes are desired, resulting in non-uniform mass/stiffness distributions along the buildings’ height. In this study, three groups of 12-story steel buildings with uniform, ascending, and descending story plan size distribution (PSD) along their height, but having the same total...

Routinely in the seismic design of buildings, it is assumed that the structure's foundation is fixed inside the ground; while at least for moving in the vertical direction, this is not actually true, and uplift of foundations may happen during an earthquake, and therefore, the assumption of fixed foundations may lead to some miscalculations in desi...

In recent years, the seismic design of buildings has become an increasingly important issue due to the devastating earthquakes that have occurred around the world. In many regions, including North Cyprus, building codes have been developed to ensure that new constructions are designed to withstand seismic hazards. However, simply complying with bui...

Past earthquakes have shown that the first help providers to the stricken people are always the local people themselves, because there has been always a relatively long delay in the arrival of rescue and relief teams at stricken areas. The issue is more crucial in largely populated cities in which rescue and relief teams may face more difficulties...

The fundamental period of the seismically isolated buildings may be close to that of the long period pulses of near-filed earthquakes, leading to very large lateral displacements in isolators, which in turn can considerably reduce the stability of isolators, increase the chance of collision of the isolated buildings to adjacent buildings, or even r...

seismic isolation system

A controlled rocking concentrically steel braced frame (CR-CSBF) is introduced as an alternative to conventional methods to prevent major structural damage during large earthquakes. It is equipped with elastic post-tensioned (PT) cables and replaceable devices or fuses to provide overturning resistance and dissipate energy, respectively. Although C...

Nowadays, seismic codes allow earthquake damages to occur in ordinary buildings, to some extent, and according to this issue, demolishing and reconstruction of many buildings become inevitable in case of a major earthquake, particularly in large cities located in seismogenic areas. Therefore, the creation of earthquake-resilient buildings, which ca...

Convergent bracing system has long been considered by structural designers. However, the performance of this system during an earthquake has disadvantages such as high base shear and low energy absorption due to buckling of the braces. Thus, researchers have tried to improve the behavior of the structure by proposing the use of different dampers in...

High dispersion of data, either obtained by field investigations, or created by time history analyses (THA), for developing fragility curves (FCs), results in remarkable uncertainty in seismic risk evaluation. Regarding the lack of studies on uncertainty reduction of FCs of electric power equipment, this paper presents three means for reducing this...

This study puts forward a comprehensive hybrid simulation modeling framework for assessing the resilience of Thermal Power Plants (TPPs) in terms of Nominal Power Generation Capacity (NPGC) following various earthquake Intensity Measures (IMs). The proposed framework utilizes a combination of agent-based and system dynamics simulation approaches to...

The main weaknesses of masonry buildings, especially those made of clay, against earthquakes are: high weight, which increases the earthquake force that is proportional to the weight; low resistance that causes an early crushing of walls and ceilings; lack of ductility, which causes the masonry buildings to collapse immediately after cracking. Thes...

Self-centering controlled rocking steel braced-frame (SC-CR-SBF) is proposed as an earthquake-resistant system with low damage. Pre-stressed vertical strands provide a self-centering mechanism in the system and energy absorbing fuses restrict maximum displacement. Presence of asymmetry in structures can highlight the advantages of employing this st...

Seismic sloshing in elevated water tanks creates some additional base moment, which simultaneous with the effect of strong vertical acceleration of near-source earthquakes may increase the P-Δ effect, as an important factor in seismic design of these structures. This study was performed to investigate the extent of this combined effect. First, an e...

High dispersion of data, created by time history analyses (THA) for developing fragility curves (FCs), results in remarkable uncertainty in risk evaluation. Regarding the lack of studies on uncertainty reduction of FCs of electric power equipment, this paper presents three means for reducing this dispersion: 1) using spectral acceleration at fundam...

Many of the proposed techniques for reducing the seismic demand of multistory buildings have not been acknowledged by the engineering community due to costs, high required technology, and/or installation and maintenance difficulties. Among the proposed methods, using controlled soft story seems more desired from cost and technology aspects. This pa...

Many bridges, as vital components of the transportation system, have shown vulnerabilities in past earthquakes. However, different parameters of earthquakes do not have the same effect on the vulnerability of this lifeline structure. In other words, the sensitivity of a bridge is different for different parameters of earthquakes. To investigate the...

Many bridges, as vital components of the transportation system, have shown vulnerabilities in past earthquakes. However, different parameters of earthquakes do not have the same effect on the vulnerability of this lifeline structure. In other words, the sensitivity of a bridge is different for different parameters of earthquakes. To investigate the...

Seismic intensity measures (IMs) perform a pivotal role in probabilistic seismic demand modeling. Past studies investigated appropriate IMs for structures, including the vital component of the transportation system, highway bridges. These studies were mainly focused on far-field earthquakes and did not consider the strong vertical component of g...

There are some cases, such as irregular or complex structures, in which the simplified analysis methods recommended by prevalent seismic codes are not able to yield results with acceptable precision. In such circumstances, the use of Non-Linear Time-History Analysis as the most robust response analysis approach is mandatory. This method is usually...

The most common tools in seismic performance assessment of highway bridges are single-variable fragility curves. However, fragility curves are not confidently reliable due to utilizing only a single intensity measure (IM). Alternatively, single- and multi-variable vulnerability functions, of which the latter is scarce and rather complex, have been...

Purpose The main purpose of this study is revival of vernacular architecture of Zegalli houses, which can be beneficial in several aspects of sustainable architecture, and therefore, its reuse in contemporary architecture can be strongly recommended. Zegalli houses, in northern Iran, are almost-entirely wooden vernacular houses, which beside to hav...

Seismic safety of super tall buildings is of paramount importance, since if they get damaged, their repair is very costly on the one hand, and their service interruption requires a substitute space for the occupants, which is very difficult, if not impossible, on the other. Regarding these facts, in seismic design of super tall buildings the desire...

The geometry of skewed and curved bridges can cause complexity of their dynamic response and difficulty of analysis against earthquakes. In addition, when vibration occurs in the curved bridges, due to their specific geometry, the vertical, flexural, and torsional vibrations of the deck are coupled. The present study was carried out aiming to inves...

Using seesaw structural system in buildings is a way for creating earthquake-resilient buildings, namely buildings which can be easily and quickly repaired with little cost, even after major earthquakes. To create such a system, all internal columns at the lowest story are removed and instead, a central mega support is used, combined with a grid of...

Controlled rocking concentrically steel braced frame (CR-CSBF) is an earthquake-resisting system that is effectively capable of reducing structural damage after earthquakes and causes resilience in the structure. Post-tensioning (PT) strands and fuse members are two important elements in CR-CBSFs to provide frame self-centering and energy dissipati...

Among highway bridges, curved ones are very common at urban intersections and, generally, in limited urban spaces. However, such bridges are often involved in multiple vibrational behaviors, making them more sensitive to vertical components of ground motion due to their irregular geometry. The primary objective of this study has been to develop a t...

Seismic risk assessment of piping systems, as a group of vulnerable facilities in oil refineries, is mostly based on the single-variable fragility curves. However, it is well-known that the fragility curves, developed based on a single intensity measure (IM), are not much reliable. For increasing the confidence level of seismic risk assessment of p...

In this article, torsional control has been studied in the plan-mass asymmetric vertical seismic isolation (VSI) system considering the three-dimensionally analytical model. In the 3D VSI, a structure is partitioned by vertical isolation planes into two inner and outer substructures interconnected by links for lateral response reduction. In an idea...

The use of energy dissipaters for creation of earthquake‐resilient buildings has been paid more and more attention in recent years, and some newly developed structural fuses or dampers have been proposed to be employed in rocking and seesaw buildings. In this study, a new type of yielding‐based dampers, called curved‐yielding‐plates energy dissipat...

Using seesaw structural system equipped with energy dissipating devices has been considered as a low-cost and low-tech way for creation of earthquake-resilient buildings. In this paper by considering three groups of multi-story buildings, including conventional buildings, LRB-based isolated buildings and building with seesaw structure, equipped wit...

Design of repairable buildings, i. e. the buildings whose structural systems can be easily repaired after a major earthquake, instead of demolishing and rebuilding, have been paid great attention by some researchers in recent decade. Use of rocking mechanism of the building’s structure (Azuhata 2004) and employing telescopic columns in buildings wi...

Design of repairable buildings, i. e. the buildings whose structural systems can be easily repaired after a major earthquake, instead of demolishing and rebuilding, have been paid great attention by some researchers in recent decade. Use of rocking mechanism of the building’s structure (Azuhata 2004) and employing telescopic columns in buildings wi...

To create a partial rocking mode in a building structure during an earthquake, two or more rigid cores with joint connection to the foundation, and capable of moving in the two main directions of the building’s plan, can be used. A rigid core with a hinge connection to the foundation is essentially unstable. However, two rigid cores can be connecte...

The seismic design of the structures is carried out by technical regulations and codes in free-field conditions (regardless of underground cavities). While with the availability of tunnels and the complex interaction between the tunnel and the aboveground structures, may be contemplated wrongly, which could be dangerous for over ground buildings an...

In this paper, the effects of form parameters on the structural efficiency of tall buildings are investigated by generating a parametric platform. The modifications of the form are normally adopted by architects in tall buildings to satisfy their aesthetic and functional needs. The effects of tapering and changing plan shape as two commonly used mo...

Every year earthquake damage causes hundreds of death all over the world. As much as possible, buildings should be kept in the elastic zone during an earthquake, therefore, the failure of building the main member is reduced. This paper investigated an oval steel shaped yielding damper used for seismic protection of chevron steel braced frames. The...

The aim of this study is to provide a new method to assess the interaction between sandy soil and buried pipeline in the presence of strike-slip faulting. To that end, two full-scale experiments were carried out on steel and polyethylene pipes. Using ABAQUS and an optimization algorithm, the stiffness of the equivalent transverse spring of the soil...

In direct system identification (DSI) method, inverse solution of the equations of motion is applied to obtain physical parameters of a linear system (structural mass, damping, and stiffness matrices). With the small error in measurement, caused by sensor drift or signal noise, these physical parameters are identified with a significant drift. In t...

Buried pipelines are faced with and vulnerable to extreme hazards such as earthquakes, different types of faulting, landslides, etc. Generally, a buried pipeline is modeled as a beam on a series of springs, which represent the surrounding soil. To determine the specifications of these springs, the equations proposed by ASCE Guideline are usually us...

In a vertical seismic isolation (VSI) system, an individual structure is partitioned in a vertical isolation plane into two dynamically different substructures interconnected by a mechanism. In this way, response reduction is expected in each substructure when compared to the original non-partitioned structure. In this study, the features of an SDO...

Introduction: The incidence angle of the seismic waves has been proven to be an important factor when analyzing the 3-D behavior of buildings. However, modern earthquake-related standards only cover partially the effects of this factor and the practicable results of relevant studies are still limited. One of the main concerns of design engineers is...

Introduction: The unsatisfactory performance of conventional construction materials like masonry, and even steel and concrete, in many recent earthquakes on the one hand, and the desire of the buildings' owners for the use of materials with high insulation capability against heat and sound for minimizing the energy consumption, as well as employing...

Structural fuses and rocking system are used in order to reduce the building response to earthquakes and damage guidance. In the proposed seesaw motion system, which is similar to the rocking system, the building columns, in top of the foundation, have been removed and a central support and structural fuses are used around the building instead of t...

In this paper, fragility functions are developed for natural gas transmission pipelines at anchor block interface under the effect of seismic wave propagation. The fragility functions are developed for three typical pipelines in two types of soils. Seismic response of the pipeline at anchor block interface is evaluated by conducting non-linear dyna...

In this study, a comparative study of non-linear static methods with time history method for Chevron braced structures (with LRB seismic base isolator at the base level) is performed. To find out the effect of the building's height on seismic responses of isolated structures, in this study 3 isolated building structures by LRB isolators with 3 diff...

Rocking motion have been used for achieving the 'resilient buildings' against earthquakes in recent studies. Lowrise buildings, unlike the tall ones, because of their small aspect ratio tend to slide rather than move in rocking mode. However, since rocking is more effective in seismic response reduction than sliding, it is desired to create rocking...

Resilience against natural disasters, such as earthquakes, has been considered as an important goal in sustainable development in recent years. On the other hand, today, sustainability is considered as a main aim in modern architecture. In spite of these facts, the role of sustainable architecture in increasing the resilience of buildings and citie...

Purpose This study aims to provide resiliency against earthquakes to the framework of an urban road network and to construct a comprehensive model with sufficient computational detail to assist metropolitan managers as a decision support tool in emergency situations via parametric analysis (model behaviour analysis with parameter changes) to quanti...

The overall shape and form of buildings have a significant impact on the structure's behavior against earthquake forces. In order to achieve the optimal design, architectural and structural engineers must interact in order to ensure the proper functioning of the structural system. Therefore, it is important to determine the relationship between the...

Up to now, a few formulas have been suggested by scholars for the amount of discharge from openings, however, the effect of opening's geometry on the amount of discharge has not addressed thoroughly. In this study, to assess the effect of rectangular openings’ aspect ratio on the discharge amount, experimental and numerical investigations have been...

In this article, a new cracked beam-column element stiffness matrix is proposed through static condensation method. Seven dimensionless coefficients are introduced and applied for a sensitivity analysis in different damage scenarios. The accuracy of this proposed stiffness matrix is verified, and compared to the other available methods. The variati...

By virtue of a new scalar potential function and Hankel integral transforms, the wave propagation analysis of a thermoelastic transversely isotropic half-space is presented under buried loading and heat flux. The governing equations of the problem are the differential equations of motion and the energy equation of the coupled thermoelasticity theor...

In conventional seismic design codes of building structures severe structural damage due to large earthquakes is accepted, provided that the structure does not collapse, and life safety of the residents is guaranteed. The extent of this allowed damage can be so high that after earthquake, demolition and reconstruction of the building becomes inevit...

Almost all of seismic design codes for building systems accept heavy damages to buildings, in case of large earthquakes, although they don’t accept the building’s collapse. Nevertheless, past earthquakes have shown that level of the accepted damage may be so high that demolishing and reconstruction of the building becomes inevitable. This, in turn,...

Almost all of seismic design codes for building systems accept heavy damages to buildings, in case of large earthquakes, although they don’t accept the building’s collapse. Nevertheless, past earthquakes have shown that level of the accepted damage may be so high that demolishing and reconstruction of the building becomes inevitable. This, in turn,...

The functionality of a hospital after major earthquakes is of great importance, and this functionality is highly dependent on the performance of the hospital’s equipments. Therefore, in seismic areas paying attention to the seismic behavior of equipments is necessity either for design or for evaluation purposes. Many of hospitals’ equipments can be...

Seismic design codes mostly claim that their requirements lead to Life Safety (LS) Performance Level (PL) for buildings. This is while many buildings, designed based on the current codes have shown unacceptable performance, and even have collapsed in some recent earthquakes, particularly near-source events. On this basis, it seems that the code pro...

In evaluation of structures, performing nonlinear response of model over a time analysis or incremental dynamic analysis needs more time. Hence, it can be beneficial if the event history report is carried out with long time steps without loss of accuracy. This study includes a method to simplify of accelerograms meant on the change of their Fourier...

Amplitude and frequency content are two important features of the earthquake which are different for near and far-fault earthquakes and in most of the standards, effects of the near -field earthquakes in loading are not considered. So study and comparison of these effects on structures is necessary. In this paper, structures operation against near...

A modified entropy-based criterion for evaluating reliability of water distribution networks is presented in the paper. Design and hydraulic parameters, as well as failure probabilities for individual links, are considered. For this purpose, a new weighting factor is defined based on the proportion of total outflow at each node to the total network...

Electric substations play a great role in electric power systems as the most important lifelines, and post insulators are among the most-used parts in many components of substations. Therefore, realizing the seismic behavior of insulators helps in creating more realistic seismic evaluations of substations, and accordingly, the whole network. In thi...

Purpose Almost design code is required for repairability of the buildings after a major earthquake. One such idea is “directed-damage design” (DDD), which means guiding the damage to some pre-decided parts of the structural system. To use the DDD idea for creation of repairable buildings, in this study, a structural system with seesaw motion with r...

Nowadays investigation of progressive collapse prevention in case of important existing and new buildings due to terrorist attacks, design or construction mistakes as well as explosion seems to be necessary. In previous work on progressive collapse of building system, the main concern has been proposing a substitute load transfer path for the delet...

In this paper, the effect of using tuned mass damper in improving the response of structures was considered. At first, three frames of 3, 9 and 20 stories were evaluated in which time history analysis was done according to El – Straw earthquake. The maximum reduction of displacement among three mentioned frames belongs to 20-stories structure in wh...

Shavadoon is a type of underground living space, formerly used in urban residences of Dezful and Shooshtar cities in southwestern Iran. In spite of their high efficiency in creating cool spaces for the hot summers of that area, Shavadoons were abandoned, like many other components of vernacular architecture, as a result of the modernism movement. H...

Most of seismic design codes for building systems allow heavy damages to buildings, in case of major earthquakes, provided that the buildings are prevented against collapse or to keep the buildings' performance in LS or at least CP level. However, amount of the allowed damage can be so high that requires demolishing of the buildings, and this, in t...

Recent earthquakes have shown that Electrical Power Substations apparatuses are seismically vulnerable. This causes to disrupt the power supply in many cases, and therefore their seismic evaluation with high reliability is significantly important. Using fragility curves is a common practice for assessing seismic vulnerability. In general, fragility...

Iran is one of the most seismic countries in the world, a lot of earthquakes occur in Iran every year. Some actions and researches have been done about Earthquake Disaster Risk Management field since 1990 after large earthquake of Manjil-Rudbar in Iran. One of the main subjects of Earthquake Disaster Risk Management is Community base Disaster risk...

In vertical seismic isolation (VSI), a building is partitioned intentionally by vertical layers into two dynamically different substructures for seismic response reduction. Initially, a 1-story frame was partitioned into two substructures, interconnected by viscous and visco-elastic links, and seismic responses of the original and the vertically is...

In seismic design and evaluation of irregular buildings most of codes recommend nonlinear time history analysis (NLTHA), which is very time-consuming, mainly since the time step size of the digitized accelerograms is usually very small. Therefore, if the NLTHA analysis can be performed by large time steps without losing much precision, it can be ve...

Development of civil engineering science has introduced tunneling as an important option in reducing the traffic volume of urban environments. Digging tunnels, in every depth, causes changes in the surface ground structure; tunneling in urban areas, especially when has passed through the residential areas has its own particular importance; there...

Recent earthquakes have shown that Electrical Power Substations' equipment are seismically vulnerable, resulting in disruption of power supply in many cases, and therefore their seismic vulnerability evaluation is of great importance. Power transformers (PTR) are critical elements in a power substation, so their proper functioning during and after...