This paper describes an ongoing work in the development of a finite element analysis system, called TopFEM, based on the compact topological data structure, TopS [1,2]. This new framework was written to take advantage of the topological data structure together with object-oriented programming concepts to handle a variety of finite element problems, spanning from fracture mechanics to topology o...

An integrated experiment and analysis research program is proposed to address the complex behavior of reinforced concrete buildings subjected to multi-directional earthquake loading and the subsequent interactions resulting from the nonlinear response of individual components that compound further the multi-directional affect of the ground motion. Results will impact a broad community ranging f...

Continuous rigid frame bridge is a common type of bridge in California, where is a seismically active areas. Main structural features of the bridge, including asymmetry, hinge structure, concretion of girder and piers affect the seismic response of the bridge significantly. In order to evaluate the safety of the bridge under earthquake, the nonlinear models of girder, limiting steels in hinge, ...

In order to investigate the dynamic response of reinforced concrete spatial frames caused by initial damages, a six-story frame model is analyzed by employing the nonlinear dynamic methodology in accordance with the alternate path method issued by General Services Administration. In this paper, the fiber model and force-based beam-column element are utilized in OpenSees. Four various scenarios ...

A failure of the non-structural component can cause significant damages in critical facilities such as nuclear power plants and hospitals. Historically, it was reported that the damage from the leakage of sprinkler systems, resulted in the shutdown of hospitals for several weeks by the 1971 San Fernando and 1994 North Ridge earthquakes. In most cases, water leakages were observed at the cross j...

Eccentrically braced frames (EBFs) are typically employed in seismic design because they integrate the benefits of concentrically and moment-resisting frames, providing both high elastic stiffness ductility. However, effect fire on structural stability EBFs has not been well documented. Object-oriented techniques used software program development have become popular recent years, primarily thei...

Abstract This paper presents a new type of prefabricated concrete structure system and the corresponding shear wall structure. The finite element analysis base on OpenSees is carried out to analyze its mechanical properties. rationality correctness are obtained by comparing it with test hysteresis curve.