over the past decade of extensive research works, the thin un-stiffened steel plate shear wall(spsw) has now emerged as a promising lateral load resisting system. considering thedemand of performance-based seismic design (pbsd) philosophy in current and futureseismic design codes, a ductility-based design was recently proposed for spsw systems withpin-connected boundary beams. however, the effe...

a total of 2519 blood samples were collected from five distinct populations of larestan, in fars province, in iran (lar, gerash, khour, latifi and berake) were examined for abo and rh blood groups. the gene frequencies obtained from these samples were compared with the hitherto reported corresponding data from other populations of fars province to determine the genetic structure of the larestan...

The design of earthquake-resistant buildings starts with defining the maximum lateral earthquake forces or their resultant. The amount of these forces depends on various factors, including coefficient of system behavior which depends on overstrength and its ductility. In this study, a method is presented for designing an earthquake-resistant system in which the distribution of lateral forces is...

During strong earthquakes, structural damage usually occurs, resulting in a degradation of the overall stiffness affected structures. This produces modification dynamic properties structures, for instance, fundamental period vibration (T1). Hence, variation T1 could be used as an indicator seismic damage. In this article, assessment four generic typologies steel buildings was carried focused on...

The seismic evaluation of existing buildings is a more troublesome assignment than the design new buildings. need for becomes necessary to know level structural damage and how cure it due earthquakes. shows structure’s behavior under loads determines ultimate capacity structure, there are several methods used in assessment analysis which may be static or dynamic. In this study, an educational b...

This paper presents a numerical analysis of the exterior Beam-Column Joints (BCJ) in resisting combination constant axial and lateral cyclic loads. The materials used this study were Normal Concrete (NC) Light Weight (LWC). has been commonly to reduce mass buildings minimize structural damages due earthquakes. A model BCJ using NC was verified experimental data from previous research. Then, the...

In this work, a tied braced frame (TBF) was developed to achieve uniform inelastic deformation in an eccentrically (EBF) by connecting links across the entire height with tie members. Herein, TBF design method is proposed, considering new lateral force distribution pattern. To better evaluate seismic performance, and verify advantages of TBF, nonlinear time-history analysis fragility were condu...

Abstract This study addresses the effectiveness of buckling restrained braces (BRBs) and viscous dampers (VDs) in dissipating seismic energy increasing performance irregular composite buildings during earthquake events. The response steel-concrete moment resisting frames 15 stories with concrete filled steel tubes (CFST) as columns beams was examined without protection devices by employing ETAB...

Due to low stiffness of braces after yielding, the structures with buckling-restrained braces (BRBs) experience high residual drifts during an earthquake, which can be intensified by aftershocks and causes considerable damages to structures. Also, due to poor distribution of stiffness, this problem is exacerbated for irregular structures. Recently, the yielding brace system (YBS) has been intro...