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由于各种施工条件的限制,预应力空间钢结构的索力张拉和调整一般都是分批分阶段进行的,但后一批索的张拉会影响前一批已张拉索的内力值,故索力张拉和调整模拟的关键问题是求出每阶段每批次的控制索力.根据索力张拉和调整均为从一个初始状态转变到一个目标状态的原理,将索力的张拉和调整统一为一个问题,即从结构索力张拉调整的初始状态和目标状态的索应变值入手来求解各阶段各批次的控制索力.最后,通过一张弦桁架结构的索力张拉调整试验及模拟分析,表明该方法是可行有效的.
Due to various construction conditions, the cable tension and adjustment of prestressed space steel structures are generally carried out in stages and in batches. However, the tension of the last batch of cables will affect the internal force value of the previous batch of cable , So the tension of the tension and adjust the simulation of the key issue is to find out the control of each batch of cable force each stage.According to the cable tension and adjust the transition from an initial state to a target state principle, Tension and adjust the unity of a problem, that is, from the structure of the cable tension adjustment of the initial state and the target state of the cable strain value to solve the various stages of the control cable force.Finally, through a chord truss structure of the cable Tension adjustment test and simulation analysis show that this method is feasible and effective.