While the existing structures, even recently constructed ones are subjected to the critical earthquakes, the catastrophic devastations are expected to occur. Therefore, at least for several important structures such as power plants, infrastructure, and buildings, there is a need to consider the critical excitation analysis. One of the important criteria in the seismic design of the structures u...

Endurance Time Method (ET) is a dynamic analysis in which structures are subjected to intensifying accelerograms that are optimized in a way that seismic performance of structures can be estimated at different hazard levels with the best possible accuracy. For the currently available ET accelerograms, regardless of the shaking characteristic, an excitation level is recognized as a representativ...

The Sirri jacket offshore platform was designed and installed in Persian gulf of Iran in 1975 and has been in service since that time. The importance of offshore structure's stability and the failure of this kind of structure during an earthquake in different active zones revealed that earthquake loading has to be considered. In this paper, Magnetorheological (MR) fluid dampers have been propos...

Soft storey building is popular due to the functional and aesthetic purpose, despite its weakness in resisting seismic excitation. Nonlinear Static (Pushover) Analysis (POA) is a time saving and simple assessment procedure prosposed in Eurocode 8 (EC8). However, its reliability in designing structure still remains a question. At the first stage, seismic performance of several building models us...

Based on the structural viscoelastic boundary theory, considering geological changes of soil layer and depth tunnel crossing, dynamic time course analysis is carried out for defective lined tube sheet structure under non-uniform seismic excitation, to obtain force deformation law whole as well section. Analyze response shield non-consistent excitation influence misalignment factors, summarize i...

Abstract This study uses a generalized and parametrized reduced-order model in the frequency-domain to evaluate effects of asynchronous excitation on lateral response bridge structures. Bridge geometry parametric regions, corresponding conceptually valley profile shapes, are explored. Both modal bounding analyses, that dependent alone, employed highlight regions where first mode is anti-symmetr...