Concrete Filled Steel Tubular Arch Bridge Seismic Analysis Of Cable

Earthquake is a natural disaster,the inevitable but can reduce the extent of the damage,under seismic action, the destruction of the bridge should be guaranteed in the event of ahigher than that of the region of earthquake intensity, can continue to use the bridge as theearthquake relief and post-disaster reconstruction of the lifeline, should increase the safetycoefficient in the design. This article uses the tian zi mountain concrete-filled steel tube archbridge cable engineering projects, to adapt to the study of the finite element model is set up.Mainly studied the following contents:1. The tian zi mountain bridge model is established，using the simplified single spinemodel (fishbone type), natural vibration frequency analysis, by changing the stiffness of thesteel tube arch and steel tube arch horizontal linkages between the way of comparativeanalysis of various parameters, the change of natural frequency of vibration, in order tooptimize the effect of lateral braces.2. This paper introduces the synthetic multipoint excitation seismic wave fitting analysismethod， the model of cross spectrum and coherence function, the strength envelopesimulation parameters are discussed, and the model of using professional software SIMQKEfitting out of accord with artificial waves field characteristics.3. Consider two different types of EL Centro and Taft natural seismic wave, the timehistory analysis, comparative analysis of the total response of the bridge under different siteconditions (including the tension forces of cables).4. Consider the tian zi mountain bridge arch of the particularity of cable, the comparativeanalysis on the with and without the completed cable force under the action of tian zimountain bridge under the action of the difference, use the EL Centro-3d seismic waves.