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针对杨家坝大跨度简支预应力渡槽在长期荷载作用下单跨结构稳定、挠度是关系到渡槽安全与正常运行的问题,采用有效模量法借助有限元软件ANSYS建模,计算了渡槽槽身在假定荷载保持不变条件下由徐变引起的应力和挠度,分析了渡槽的安全稳定性。结果表明,该渡槽徐变应力和挠度均满足现行规范要求,为工程设计提供了重要参考。
Aimed at the stability of single span structure of long-span simple-supported prestressed aqueduct under long-term load, the deflection is related to the safety and normal operation of aqueduct. Based on the finite element method ANSYS, the effective modulus method is used to calculate the displacement of aqueduct The stress and deflection due to creep under the assumption of constant load are analyzed, and the safety and stability of the aqueduct are analyzed. The results show that the creep stress and deflection of the aqueduct both meet the requirements of the current codes and provide an important reference for engineering design.