Anti-Seismic Performance Analysis of Cable-Stayed Bridge with Single Tower,Single Cable and Wide Bridge Deck

Spatial finite model for whole bridge with floating or semi-floating systems are separately used to calculate dynamic proper value of cable-stayed bridge which strides over the Huangshui River on Tonghai Rode in Xining City.The influence of different structure systems on dynamic proper value is analyzed.Rigidity and boundary conditions of bridge are examed in this paper.Based on this,with multi-dimensional seismic response spectrum under different seismic grade,considering cable sag effect and pile-soil interaction,the anti-seismic performance of structure is examed.The improved measure and suggestion is put forward for the design of bridge.The paper supports engineering experience and efficient analysis method of seismic response for cable-stayed bridge with single tower,single cable and wide bridge deck.