湛江海湾大桥锚拉板式索梁锚固区疲劳试验

为评估湛江海湾大桥锚拉板式索梁锚固结构关键构造细节的疲劳性能,对该结构进行了足尺模型疲劳试验.为指导疲劳试验,了解结构受力特性,用通用有限元软件ANSYS对结构进行了分析.结果表明,锚拉板与锚拉筒之间的连接焊缝下端部应力集中明显,最大主拉应力出现在该区域;在设计疲劳荷载作用下,该结构关键构造细节处均未发现疲劳裂纹,结构疲劳性能满足设计要求.

Fatigue Test of Tensile Anchor Plates in Cable-Beam Anchorage Zones for Zhanjiang Gulf Bridge

In order to assess the fatigue performance of the key connection details of tensile anchor plates in cable-beam anchorage zones, a full-scale model fatigue test of the tensile anchor plates of Zhanjiang gulf bridge was conducted. ANSYS, a finite element software, was used to analyze the structural behavior to guide the fatigue test. The analysis and test results show that the concentration of stresses at the end of fillet welds between the tensile anchor plate and the tensile anchor tube is obvious, and the maximum principal tensile stress occurs in the stress concentration region. In addition, no fatigue cracks were found in the test under the condition of the fatigue load designed. This shows that the fatigue life of these connection details can satisfy the design requirement.