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作为一种高次超静定结构体系,斜拉桥在合理成桥状态确定以后需要根据既定的施工工序确定分阶段合理施工状态。斜拉桥合理施工状态计算方法的正确选择对于保证合理施工状态与合理成桥状态的吻合具有非常重要的意义。本文通过建立MIDAS/Civil有限元模型,并基于无应力状态法基本原理确定了斜拉桥合理施工状态。研究表明:无应力状态法在斜拉桥合理施工状态计算中的可行性和合理性,同时可为其他类型桥梁合理施工状态的确定提供参考。
As a kind of high-order statically indeterminate structure system, the cable-stayed bridge needs to determine the reasonable construction state in stages according to the established construction procedure after the reasonable bridge state is established. The correct choice of the reasonable construction state calculation method of cable-stayed bridge is very important for ensuring the reasonable construction state and reasonable bridge formation state. In this paper, MIDAS / Civil finite element model is established, and the reasonable construction state of cable-stayed bridge is determined based on the principle of non-stress state method. The research shows that the method of stress - free state is feasible and reasonable in the calculation of reasonable construction state of cable - stayed bridges and provides a reference for the determination of reasonable construction conditions of other types of bridges.