In present study, the effects of optimization on seismic energy spectra including input energy, damping energy and yielding hysteretic energy are parametrically discussed. To this end, 12 generic steel moment-resisting frames having fundamental periods ranging from 0.3 to 3s are optimized by using uniform damage and deformation approaches subjected to a series of 40 non-pule strong ground motio...

Hyperstatic Reaction Method (HRM) is a simple but effective method with attractive features in calculating internal forces and deformations of the tunnel lining. The superior ability HRM under static conditions inspires further development this for seismic design. This paper implements an improved estimating seismic-induced lining quasi-static condition. To end, modification parameter (a) appro...

Seismic ductility reduction factors for flexural-type structures with vertical irregularities subjected to pulse-like and nonpulse-like ground motions are investigated in this paper. By establishing various multi-node flexural cantilever-column models, the ductility reduction factor of vertically irregular structures is studied by modifying the ductility reduction factor of irregular structures...

Study on the seismic behavior of piled rafts and pile groups while the same amount of construction material and excavation is used in their construction, are the main objective of this research. The process where the raft interaction with soil can affect the seismic response and stress distribution is also discussed in the current study. By means, ABAQUS software was applied for the finite elem...

Irregular buildings make up a large portion of  urban infrastructure. Presence of irregularities can be due to architectural and  user changes in building stories. Main objective of this article is evaluate seismic performance of structures with vertical irregularities. Seismic responses are obtained by enveloping peak inelastic responses resulting from pushover analyses according to provided p...

study on the seismic behavior of piled rafts and pile groups while the same amount of construction material and excavation is used in their construction, are the main objective of this research. the process where the raft interaction with soil can affect the seismic response and stress distribution is also discussed in the current study. by means, abaqus software was applied for the finite elem...

In this paper, the effects of post-yielding stiffness on the response of non-linear structural systems subject to seismic actions are investigated. For this purpose, two hysteretic models are analyzed and then compared. The first is a bilinear plastic model, representing structures that exhibit strain hardening characteristics. The second is the elastic-perfectly-plastic model, that, even if do...