钢筋混凝土矩形桥墩的延性抗震分析  

Anti-Seismic Analysis of Ductility of Reinforced Concrete Bridge Piers with Rectangle Section

作　　者：李永学[1] 刘贵位[1] 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,哈尔滨市150090

出　　处：《公路》2010年第10期20-27,共8页Highway

摘　　要：利用各种材料的弹塑性应力—应变关系求解结构任意截面的弯矩—曲率关系是桥梁结构延性抗震分析的关键所在。针对钢筋混凝土矩形桥墩,将纵向钢筋等效为钢环,将截面等效分解为多个截面的组合体,推导出了计算弯矩—曲率关系(M-φ曲线)的简便计算公式;结合分段近似求解位移的计算公式,利用C语言编制了P-Δ曲线的计算程序。通过理论计算与荷载试验结果的比较分析,不但证明了简便计算方法的精确性和实用性,还初步探讨了不同类型的材料应力—应变关系对桥墩弹塑性力学分析结果的影响,验证了我国现行《公路桥梁抗震设计规范》中建议的材料模型的可靠性。It is a key to get any sections＇ moment-curvature curve by using material＇s elastic-plastic stress-strain relation for bridge structure＇s anti-seismic ductility analysis. To the reinforced concrete bridge piers with rectangle section, the new M-9 curve calculation formulas are given by simulating all the vertical steels as a steel ring and simulating the section as a combination of several sections. Combining with dis- placement approximation calculating formulas, a P-＆curve calculating program is made by C language. Through the calculation and comparison with some experiments, not only the accuracy of new calculation methods is proved, but also a preliminary discussion for material stress - strain relations and its effects in this simulation calculation is made, the reliability of material model given by China＇s current Highway Bridge Seismic Design Specifications is proved too.

关 键 词：桥梁工程 延性 仿真计算 钢筋混凝土矩形桥墩 M-Φ曲线 P-Δ曲线 材料模型 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]