Joint optimization of key parameters of transverse seismic isolation system for cable-stayed bridge with unequal height pylons

doi:10.16265/j.cnki.issn1003-3033.2021.04.010

Abstract

Abstract: In order to explore influence of key parameters of transverse seismic isolation system, which consisted of steel dampers and anti-wind supports, on transverse seismic response of cable-stayed bridges, taking a cable-stayed bridge with unequal height pylons as an example, orthogonal test design method was used to set analysis conditions for joint optimization of parameters based on balance principle between structural internal force and displacement response. Then, internal force and displacement response, and energy dissipation of steel dampers were set as optimized indexes, and influence of steel dampers' yield force and anti-wind supports' initial clearance on these indexes was studied. The results show that significant parameter coupling effect is observed from internal force of auxiliary pier and displacement response of side-span beam end at higher pylon side, so joint optimization should be considered. Moreover, internal force and displacement response can be significantly decreased by setting steel dampers on abutments and piers, but not the internal force response of pylons.

Key words: cable-stayed bridges with unequal height pylons, transverse seismic isolation system, joint optimization of parameters, orthogonal test design, coupling effect

CLC Number:

ZHAO Guohui, PAN Youdong. Joint optimization of key parameters of transverse seismic isolation system for cable-stayed bridge with unequal height pylons[J]. China Safety Science Journal, 2021, 31(4): 72-80.

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