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北盘江新型空腹式连续刚构桥角隅节点模型试验研究

ISSN号：1672-3961
期刊名称：山东大学学报(工学版)
时间：2016
页码：113-119
期号：06
便笺：37-1391/T
分类：U448.23[建筑科学—桥梁与隧道工程;交通运输工程—道路与铁道工程]
作者地址：中交第二公路勘察设计研究院有限公司;山东大学岩土与结构工程研究中心;山东省质量技术监督局信息中心;
作者机构：[1]中交第二公路勘察设计研究院有限公司,湖北武汉430057, [2]山东大学岩土与结构工程研究中心,山东济南250061, [3]山东省质量技术监督局信息中心,山东济南250002
相关基金：国家重点基础研究发展计划（973）资助项目（2010CB732002）;国家自然科学基金资助项目（51379113）;高等学校博士学科点专项科研基金资助项目（20120131110031）

关键词：桥梁工程, 空腹式连续刚构, 角隅节点, 试验研究, 数值模拟, 力学性能, bridge engineering, open-web continuous rigid-frame, comer node, experimental research, numerical simulation , mechanical performances

中文摘要：

为研究空腹式连续刚构桥新型桥梁结构角隅节点的力学性能，设计了角隅节点1：5缩尺模型试验梁。通过静力荷载试验，利用静态采集仪及挠度计，测试角隅节点模型梁悬臂加载状态下的应变和挠度。建立模型梁有限元空间数值模型，并将有限元数值计算结果与试验数据进行对比分析。研究结果表明：空腹式连续刚构桥角隅节点具有区别于传统斜腿刚构桥角隅节点的力学性能，其顶板顺桥向基本受压应力作用；角隅节点区域局部应力较高，应加强此部位设计；剪力滞效应也同样存在于角隅节点部位；数值模拟结果与试验结果基本一致。本研究进一步揭示了空腹式连续刚构桥角隅节点力学性能，验证了数值模拟的可行性，为今后此类该桥型角隅节点设计提供了借鉴。

英文摘要：

In order to investigate mechanical performances of open-web continuous rigid frame bridge comer node, 1 ： 5 scaled model test girder was designed. Through the static load test, the static data acquisition instrument and deflection measurement sensors were used to measure the strain and deflection of model test girders under cantilever state. The finite element analysis （FEA） numerical model of test girder had been conducted, and numerical results were compared with test results. The results showed that, the comer nodes of open-web continuous rigid frame bridge had mechanical properties that were different from those of conventional slant-legged rigid frame bridge. The longitudinal top plates of model girder were subjected to pressure stress. Comer node region was under so high local stress that must be strengthened during design process. Shear lag effect also existed in the corner node model. Numerical simulation results were basically in accord with test data. This research revealed the mechanical performances of open-web continuous rigid frame bridge comer node, and verified the feasibility of numerical simulation, and provided a theoretical guild for same type bridge comer node design.

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