【摘要】 太枣沟大桥是位于地震区的钢筋混凝土连续刚构桥。结合太枣沟大桥主桥的设计情况,建立动力分析有限元模型,对钢筋混凝土连续刚构桥全桥动力特性进行分析,分别选用50年超越概率10%和50年超越概率2%两个水准的反应谱进行大桥的抗震分析。根据抗震分析的结果绘制结构在地震作用下的内力包络图,对塑性铰出现的位置进行判断,对太枣沟大桥各个桥墩在两水准地震作用下的弹塑性行为做出评估,并对原设计方案提出合理建议。更多还原

【Abstract】 Main spans of Taizao Gou Bridge are designed as a prestressed concrete continuous girder bridge located in seismic areas.Based on the design conditions of the main spans,the dynamic characteristics of the whole concrete continuous girder bridge are analyzed.The seismic analyses is done according to the current Code.Rseponse spectrums which describe 10% transcendental probability and 2% transcendental probability in 50 years,are used in the seismic analyses.According to the results,envelope of internal force under the earthquake action is given.Position of the plastic hinge is determined and elastic behavior based on earthquake action at two levels is estamated.Resonable suggestion is raised also.更多还原