Title: Study on multi-stage seismic design theory and practice
Abstract: Based on the bridge seismic design principle and taking into account the static design requirements,multi-stage seismic design theory was proposed,which was achieved by adopting multi-stage seismic device.Setting continuous beam bridge as an example,preloaded spring damper device(PSDD) and cable-sliding friction aseismic bearing(CFAB) were separately adopted by using multi-stage seismic design to analyze seismic performance of bridge,compared to the case that multi-stage seismic device was not employed.It was found:different criteria for bridge should be adopted in different stages based on multi-stage seismic design theory,which unified static design and dynamic design.Under strong earthquake,PSDD could reduce seismic effect to superstructure by reducing stiffness and increasing damper of whole bridge,and CFAB could reduce seismic effect on superstructure by bearing friction.Other components of bridge could be designed by strength criterion by employing the two multi-stage seismic devices separately,which has simplified the bridge design.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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