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正常使用过程中张弦梁结构下弦索在荷载态几何下的索力大小是影响结构安全的重要因素.在施工误差、环境因素、松弛等因素作用下,索力可能与设计值差别较大,结构设计需要掌握真实索力.通过分析张弦梁结构的整体受力特点,采用使用阶段张弦梁结构有限元求解模型,建立张弦梁结构构件内力与结构位移的相关关系.基于反问题求解正则化方法,将问题转化为通过实测结构位移进而识别索力.数值模拟算例验证了方法的理论可行性.
Under normal operation, the cable force of the lower chords of the beam string structure under load geometry is an important factor affecting the structural safety.Under the construction error, environmental factors, relaxation and other factors, the cable force may differ greatly from the designed value, and the structural design We need to know the true cable force.Through the analysis of the overall force characteristics of the beam string structure, the finite element method is used to solve the internal force and structural displacement of the beam string structure element.Based on the inverse problem solving regularization method, the problem is transformed into The structure force is measured and the cable force is identified, and numerical simulation shows that the method is feasible.