车辆荷载作用下自锚式悬索桥的横梁受力分析研究  

Mechanical Properties of Cross Beams in Concrete Self-Anchored Suspension Bridge Under Vehicular Load

作　　者：谭晶晶 乔朋[2] TAN Jingjing;QIAO Peng(China Railway Jian'an Engineering Design Institute Co.,Ltd.,Xi'an 710061,China;School of Civil Engineering,Chang'an University,Xi'an 710061,China)

机构地区：[1]中铁建安工程设计院有限公司,陕西西安710061 [2]长安大学建筑工程学院,陕西西安710061

出　　处：《国防交通工程与技术》2022年第4期9-12,共4页Traffic Engineering and Technology for National Defence

摘　　要：为掌握混凝土自锚式悬索桥中横梁的受力特点,分别利用平面简化法和空间梁格法对某双塔三跨自锚式悬索桥在车辆荷载作用下的横梁受力进行对比分析,并提出了等效梁格荷载的确定方法,分析结果证明空间梁格法的分析结果更加准确。双边主梁体系的混凝土自锚式悬索桥中横梁受力特点:中跨横梁跨中正弯矩较边跨的分配更均匀,边跨横梁跨中正弯矩最大值较中跨更小、最大负弯矩较中跨更大。文中分析方法和结论可供类似纵横梁悬吊桥面体系的横梁设计参考。The mechanical properties of cross beams in self-anchored suspension bridge were studied.Aiming at a concrete self-anchored suspension bridge with two towers and three spans,the mechanical properties of cross beams under vehicular load were analyzed separately by simplified plane method and space beam grillage method.And the definition of equivalent beam grillage load and its calculating method were proposed.The results proved that the analysis of the space beam grillage method was more accurate.The mechanical properties of cross beams in concrete self-anchored suspension bridge with two side main beams were obtained through the theoretical analysis.The distribution coefficients of positive moment in the mid-section of middle span are smaller than that for side span.However,compared with the middle span,the maximum positive mid-section moment in the cross beams of side spanis smaller,but its maximum negative moment is larger.The analysis method and results in this paper provide references for the beam design of similar suspension bridge deck system.

关 键 词：混凝土自锚式悬索桥 横梁 受力分析 空间梁格法 等效梁格荷载 

分 类 号：U443.323[建筑科学—桥梁与隧道工程] U441.4[交通运输工程—道路与铁道工程]