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为给斜拉桥中钢锚梁-钢牛腿组合锚固结构的设计提供参考,针对钢锚梁边界条件变化导致传力机理不同的特点,基于平面框架理论,推导了斜拉索水平索力在钢锚梁和索塔间分配值的理论计算式,并以实际工程试验为背景,将理论计算结果与足尺模型试验结果、有限元模型计算结果进行对比分析,以验证理论计算式的合理性。结果表明:所提出的理论计算式较为合理;理论计算式计算结果与试验结果、有限元计算结果较为吻合,三者的水平索力分配值之差在10%以内,理论计算结果与有限元计算结果之差在5%以内。
In order to provide a reference for the design of composite anchorage structure of steel anchor beam and steel cow leg in cable-stayed bridge, aiming at the characteristics of different force transmission mechanism caused by the change of boundary conditions of steel and anchor beam, based on plane frame theory, The theoretical calculation formula of the distribution value between the steel anchor beam and the pylon, and the actual engineering test as the background, the theoretical calculation results are compared with the full-scale model test results and the finite element model calculation results to verify the rationality of the theoretical calculation formula . The results show that the theoretical calculation formula proposed is reasonable. The calculation results of the theoretical calculation are in good agreement with the experimental and finite element results. The difference between the three horizontal cable force distribution values is within 10%. The theoretical calculation and finite element calculation The difference between the results is less than 5%.