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国内外常采用理论分析和模型试验相结合的方式来研究斜拉桥索梁锚固结构的应力特征。以某斜拉桥锚拉板式索梁锚固结构为例,采用桥梁专业计算软件MIDAS CIVIL建立全桥空间杆系模型,确定了索梁锚固区试验模型的选取位置,采用大型通用有限元软件ABAQUS建立选取节段空间板单元模型,经过对比分析,对锚拉板式索梁锚固区试验模型进行了长度、宽度和高度的优化。最终确定的索梁锚固区试验模型不仅满足了实验室场地要求、设备要求和材料的合理利用,还保持了与原桥的高度相似性,保证了后续试验的可行性。
At home and abroad, theoretical analysis and model tests are often used to study the stress characteristics of the cable-stayed bridge anchorage structure. Taking the cable-stayed girder anchorage structure of a cable-stayed bridge as an example, a full-bridge space bar model was established by using the bridge specialized calculation software MIDAS CIVIL. The selected location of the cable girder anchorage zone test model was established and a large general finite element software ABAQUS was established The plate-element model of segment space is selected. After comparison and analysis, the length, width and height of the anchorage zone of anchor-plate girder anchorage zone are optimized. The final test model of cable girder anchorage zone not only meets the laboratory site requirements, equipment requirements and the rational use of materials, but also maintains a high degree of similarity with the original bridge to ensure the feasibility of follow-up test.