Abstract
Pasco-Kennewick (PK) section girder is widely used in the concrete cable stayed bridges with double cable planes, because of its excellent mechanical properties. By created the double girder finite element model, this paper analyzed the dynamic response of one concrete cable stayed bridges with PK section and the dynamic response of the diaphragms. According to the results of the analysis, the diaphragms which near the auxiliaries’ pier s and pylons generated large seismic internal force under the seismic load, and it is account for large proportion when compared with the static load. So, single-girder model can not satisfy the requests for the dynamic analysis of the girder. Due to the cross beams generated large positive, negative bending moment when seismic load impact, we must take notice of strengthening reinforcement in diaphragms. Especially the reinforcement for the negative bending moment, so as to meet the requests for the anti-seismic.
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