罕遇地震下曲线钢-混凝土组合梁桥的墩柱扭转效应

发布时间：2019-08-07 14:24

【摘要】：为了研究曲线钢-混凝土组合梁桥在罕遇地震下的墩柱扭转效应,基于考虑扭转效应的钢管混凝土纤维梁模型,建立了曲线组合梁桥的杆系有限元分析模型。对不同输入方向的三条地震波作用下是否考虑墩柱扭转效应的纤维梁模型的计算结果进行了对比,包括墩顶位移、墩柱扭转角和墩柱内力等。在此基础上,对曲线组合梁桥在罕遇地震作用下的扭转效应的关键影响参数进行了分析。结果表明:采用考虑扭转效应的纤维梁模型分析曲线组合梁桥在地震作用下的受力反应,可有效的反映罕遇地震下曲线钢-混凝土组合梁桥的墩柱扭转效应。另外,曲率半径和墩高是影响曲线组合梁桥在纵向地震作用下墩柱扭转效应的主要因素。
[Abstract]:In order to study the torsional effect of pier columns of curved steel-concrete composite beam bridge under rare earthquake, based on the concrete-filled steel tubular fiber beam model considering torsional effect, the finite element analysis model of curved composite beam bridge is established. The calculation results of fiber beam model considering the torsional effect of pier and column under the action of three seismic waves with different input directions are compared, including the displacement of pier top, the torsional angle of pier and column, and the internal force of pier column. On this basis, the key influencing parameters of torsional effect of curved composite beam bridge under rare earthquake are analyzed. The results show that using the fiber beam model considering torsional effect to analyze the stress response of curved composite beam bridge under earthquake can effectively reflect the torsional effect of pier and column of curved steel-concrete composite beam bridge under rare earthquake. In addition, curvature radius and pier height are the main factors affecting the torsional effect of pier columns in curved composite beam bridges under longitudinal earthquake.
【作者单位】：中国铁道科学研究院铁道建筑研究所;清华大学土木工程系;中国路桥工程有限责任公司;
【基金】：国家自然科学基金项目(51078206) “十二五”科技支撑计划项目(2011BAJ09B02)
【分类号】：TU398.9

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