in recent years, seismic evaluation and vulnerability of the existing buildings, that have been designed based on an earlier seismic design code or designed without seismic design criteria, has been very important. in this paper, the seismic evaluation and vulnerability of concrete buildings, using an old 5- story building with shear walls as an example has been discussed. for this building, fi...

the purpose of this study is to determine the effect of vierendeel panel width and vertical truss spacing ratio in an inelastic behavior of the stf system due to earthquake loads. the stf system is applied to a six-storey building that serves as apartments [2]. the stf system is used in the building in the transverse direction (n-s direction), while in the longitudinal direction (w-e direction)...

the nonlinear static procedures (nsps) proposed by design codes do not lead to reliable results especially for tall buildings. they generally provide inconsistent estimates of inelastic seismic demands, especially for the top floors due to their inabilities in considering the higher modes effects. in this paper, a new enhanced pushover procedure is proposed which is based on the envelope of the...

Concrete-filled steel tubular Y-shaped (CFST-Y) piers are good candidates for meeting the structural and aesthetic requirements of bridges. By using theoretical nonlinear static (pushover) analyses, seismic performances three types CFST-Y were evaluated at different hazard levels. The formulas first proposed to estimate lateral stiffnesses with pier–deck connections. Then, ductility development...

A review of previous studies shows that there are two general views on how to determine demand in structures through incremental nonlinear static analysis. In the first view, multi-modal methods are used to determine demand in structures. In this view, the applied load pattern is applied to the structure according to the shape of each vibration mode, assuming that the structure deformation foll...

La presente investigación ha modelado la mampostería no estructural mediante el planteamiento analítico de puntales rígidos y un elemento puntal central (elemento lineal). evaluación los pórticos más se generado a través análisis estático lineal (pushover) en software ETABS. evalúa varias tipologías fachadas típicas edificaciones, para lo cual, usando las curvas capacidad puntos desempeño obten...

Abstract Fragility curves are the primary way of assessing seismic risk for a building with numerous studies focused on deriving these fragility and how to account inherent uncertainty in assessment. This study focuses three-story steel moment frame structure performs assessment using new approach called SPO2FRAG (Static Pushover Fragility) that is based pushover analysis. further compared cont...

Steel plate shear walls (SPSW) have been used as the primary lateral force resisting system in buildings. Extensive analytical studies on steel plate shear walls in the United States, Canada, Taiwan and other countries have already validated the simple analytical model known as strip model to predict the monotonic behavior of this kind of structural system. However, more research is still neede...