Study on the Response of Cable-stayed Bridges with Different Structural Systems Under Bidirectional Earthquakes
In order to explore the variation law of internal force and displacement response of cable-stayed bridges with different structural systems under the action of two-way earthquakes,according to the actual engineering,the cable-stayed bridge models of the three structures were established by Mi-das finite element software,and the seismic response laws of the cable-stayed bridges of the three structural systems were compared and analyzed by using the nonlinear time history analysis method.The results showed that the displacement response of the main tower and the main girder of the cable-stayed bridge with semi-floating system under the simultaneous action of longitudinal and vertical earthquake was larger,and the internal force response of the bottom of the main tower of the cable-stayed bridge with rigid system was the largest.The internal force response of the bottom of the main tower of the floating system cable-stayed bridge is the smallest.Under the simultaneous action of transverse and vertical earthquake,the displacement response of the top of the main tower of the ca-ble-stayed bridge with semi-floating system is larger,and the lateral displacement response of the mid-dle span of the main girder is the smallest.The mechanical performance of the cable-stayed bridge with semi-floating system under the action of earthquake is better and more reasonable.
cable-stayed bridgeseismic responsestructural system
万方数据
维普
