北盘江新型空腹式连续刚构桥角隅节点模型试验研究
发布时间：2019-03-09 11:47
【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。
[Abstract]:In order to study the mechanical properties of the corner joint of a new type of bridge with hollow continuous rigid frame bridge, the 1:5 scale model test beam of the corner joint was designed. Through static load test, the strain and deflection of corner node model beam under cantilever loading are tested by using static collecting instrument and flexometer. The finite element space numerical model of the model beam is established, and the finite element numerical calculation results are compared with the experimental data. The results show that the corner joint of the hollow continuous rigid frame bridge has the mechanical properties different from the traditional angle joint of the inclined leg rigid frame bridge, and its roof is basically subjected to compressive stress along the bridge direction. The design of the corner joint should be strengthened because of the high local stress in the corner joint. The shear lag effect also exists in the corner joint, and the numerical simulation results are basically consistent with the experimental results. This study further reveals the mechanical properties of corner joints of hollow-abdominal continuous rigid frame bridges, validates the feasibility of numerical simulation, and provides a reference for the future design of this kind of bridge-shaped corner joints.
【作者单位】： 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;
【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)
【分类号】：U448.23
[Abstract]:In order to study the mechanical properties of the corner joint of a new type of bridge with hollow continuous rigid frame bridge, the 1:5 scale model test beam of the corner joint was designed. Through static load test, the strain and deflection of corner node model beam under cantilever loading are tested by using static collecting instrument and flexometer. The finite element space numerical model of the model beam is established, and the finite element numerical calculation results are compared with the experimental data. The results show that the corner joint of the hollow continuous rigid frame bridge has the mechanical properties different from the traditional angle joint of the inclined leg rigid frame bridge, and its roof is basically subjected to compressive stress along the bridge direction. The design of the corner joint should be strengthened because of the high local stress in the corner joint. The shear lag effect also exists in the corner joint, and the numerical simulation results are basically consistent with the experimental results. This study further reveals the mechanical properties of corner joints of hollow-abdominal continuous rigid frame bridges, validates the feasibility of numerical simulation, and provides a reference for the future design of this kind of bridge-shaped corner joints.
【作者单位】： 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;
【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)
【分类号】：U448.23
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