Abstract
The article presents higher vibration modes accounting method to evaluate system seismic resistance by nonlinear static method. As part of the study, in order to verify the proposed method for finding the inertial forces modified system series of dynamic and static calculations was performed. Proposed inertial forces modified system can be applied for seismic resistance estimation of system with elastomeric supports. The results difference varies within 12%.
Highlights
About 300 thousands earthquake occur in the world
To estimate the responses error obtained by the multimodal nonlinear static method, it is necessary to compare the results with the responses obtained by the time history the direct dynamic method using the acceleration records Erthq1-3 [8]
Multimodal nonlinear static method was proposed to take into account the higher vibration modes influence under seismic evaluation
Summary
About 300 thousands earthquake occur in the world. Some earthquakes have disastrous effects on entire cities destroying them and causing enormous economic damage. The seismic resistance increase is one of the actual issues during construction in seismically hazardous areas. Seismic resistance is achieved by structural element stiffness increasing (passive seismic protection), that leads to inertial loads rise. This solution is not always rational and economically feasible. In the 60s of the twentieth century an alternative way for earthquake resistance was proposed - seismic isolation (active seismic protection). The term "seismic isolation" means a inertial forces decrease caused by seismic impact, using special elements to reduce the inertial loads on the system.
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