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基于有限位移理论,采用广义的杆系结构几何非线性有限元法,联系实际的施工方法和施工过程,提出了索承网壳结构施工计算的循环前进分析方法。该方法以实际施工顺序进行前进分析,以初应变增量索力调整方法进行循环迭代,能够精确计及结构的几何非线性、后批预应力筋张拉对前批预应力筋张力的损失以及其它因素的影响。用该方法获得的施工初始索力进行施工,设计索力及位形易于保证,是一种实用的、高效率的分析方法。编制的施工状态计算机仿真分析程序,可实现施工状态的实时跟踪分析与控制。
Based on the theory of finite displacement, using the generalized finite element method of the nonlinear finite element method of the bar system, combining with the actual construction method and the construction process, the cyclic forward analysis method for the construction calculation of cable-supported reticulated shell structures is proposed. The method carries out forward analysis in the actual construction sequence, and iteratively adjusts the initial strain increment cable force to perform a cyclic iteration, which can accurately take into account the geometric nonlinearity of the structure and the loss of the tension of the pre-stressed prestressed tendons after the post-batch prestressed tendon tensioning. Influence of other factors. The construction initial cable force obtained by this method is used for construction, and the design of the cable force and configuration is easy to ensure. It is a practical and highly efficient analysis method. The computer simulation analysis program compiled for construction status can realize real-time tracking analysis and control of construction status.