| 竖向荷载作用下曲线梁桥约束反力特性分析 |
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| 引用本文： | 潘晓民,孙立山,宁伯伟.竖向荷载作用下曲线梁桥约束反力特性分析[J].桥梁建设,2011(3). |
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| 作者姓名： | 潘晓民 孙立山 宁伯伟 |
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| 作者单位： | 中铁大桥勘测设计院有限公司,湖北武汉,430056 |
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| 摘 要： | 为分析竖向荷载作用下曲线梁桥约束反力的特性,以力法方程、三弯矩方程为基础,推演单跨曲线梁桥和连续曲线梁桥的约束反力(扭矩)表达式,并采用推导出的表达式和有限元程序PCBP分别对某六跨连续曲线梁桥的内力与约束反力进行计算分析。分析结果表明:在点支承抗扭约束条件下,受竖向荷载作用的单跨曲线梁桥,其曲线内侧的约束反力小于曲线外侧的;受竖向荷载作用的连续曲线梁桥,梁端曲线内侧的约束反力小于曲线外侧的,而在中间支承处会出现曲线内侧的约束反力大于曲线外侧的现象。
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| 关 键 词： | 曲线桥 约束反力 力法方程 三弯矩方程 有限元法 |
Analysis of Restraint Reaction Force Characteristics of Curved Beam Bridges Under Action of Vertical Load |
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| PAN Xiao-min,SUN Li-shan,NING Bo-wei.Analysis of Restraint Reaction Force Characteristics of Curved Beam Bridges Under Action of Vertical Load[J].Bridge Construction,2011(3). |
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| Authors: | PAN Xiao-min SUN Li-shan NING Bo-wei |
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| Institution: | PAN Xiao-min,SUN Li-shan,NING Bo-wei(China Railway Major Bridge Reconnaissance & Design Institute Co.,Ltd.,Wuhan 430056,China) |
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| Abstract: | To analyze the restraint reaction force characteristics of curved beam bridges under the action of vertical load,the expressions for the restraint reaction forces(torsional moment) of the single-span curved beam bridge and continuous curved beam bridge are deduced on the basis of the force method equation and three-moment equation.The internal force and the restraint reaction force of a 6-span continuous curved beam bridge are respectively calculated and analyzed by the deduced expressions and finite elemen... |
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| Keywords: | curved bridge restraint reaction force force method equation three-moment equation finite element method |
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