北盘江新型空腹式连续刚构桥角隅节点模型试验研究

doi:10.6040/j.issn.1672-3961.0.2016.137

摘要/Abstract

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。

关键词: 空腹式连续刚构, 力学性能, 角隅节点, 试验研究, 数值模拟, 桥梁工程

Abstract: In order to investigate mechanical performances of open-web continuous rigid frame bridge corner 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 corner 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. Corner 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 corner node, and verified the feasibility of numerical simulation, and provided a theoretical guild for same 山东大学学报 (工学版)第46卷 - 第6期彭元诚,等:北盘江新型空腹式连续刚构桥角隅节点模型试验研究 \=-type bridge corner node design.

Key words: bridge engineering, open-web continuous rigid-frame, mechanical performances, corner node, experimental research, numerical simulation

中图分类号:

U448.23

彭元诚,董旭,梁娜,邓振全. 北盘江新型空腹式连续刚构桥角隅节点模型试验研究[J]. 山东大学学报(工学版), 2016, 46(6): 113-119.

PENG Yuancheng, DONG Xu, LIANG Na, DENG Zhenquan. Model test of the Beipan River's new open-web continuous rigid frame bridge corner node[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2016, 46(6): 113-119.

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