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斜拉桥的索力大小直接决定了斜拉桥主梁的内力状态,确定斜拉桥的索力是确定合理成桥状态的关键。本文介绍了一些现有的确定斜拉桥合理成桥状态的方法,并确定了适合不对称混合梁斜拉桥合理成桥状态确定的原则。以某不对称混合梁斜拉桥为工程背景,在有限元软件Midas/Civil中建立了仿真分析模型,利用其未知荷载系数功能确定了该不对称混合梁斜拉桥的合理成桥状态。计算结果表明,该合理成桥状态满足规范要求,具有可靠性。总结了该类桥型合理成桥状态的一些特点,为该类结构的合理成桥状态的确定提供借鉴。
The cable force of the cable-stayed bridge directly determines the internal force state of the main beam of the cable-stayed bridge. Determining the cable force of the cable-stayed bridge is the key to determine the reasonable state of the bridge. This paper introduces some existing methods to determine the reasonable bridge state of cable-stayed bridge, and determines the principle of determining the reasonable bridge state of asymmetric hybrid beam-stayed bridge. Taking an unsymmetrical hybrid cable-stayed bridge as engineering background, a simulation analysis model is established in the finite element software Midas / Civil, and the reasonable bridge formation of the asymmetric hybrid cable-stayed bridge is determined by the unknown load factor function. The calculation results show that the reasonable bridge state meets the requirements of the specification and is reliable. This paper summarizes some of the characteristics of this type of bridge into a reasonable state of the bridge, to provide a reference for the determination of the reasonable bridge state of such structures.