【摘要】 本文以常澄高速公路某部分预应力混凝土斜拉桥为工程背景,采用有约束的最小二乘法对施工阶段计算模 型中的主要参数进行识别,以主梁标高误差平方和最小为目标函数,参数调整量大小为约束条件,采用Matlab优化 函数进行求解,得出了符合工程实际的参数修正值。实例证明采用该方法进行参数识别可以使计算模型基本上与实 际结构相一致,在此基础上可以实现时施工状态进行更好的控制。更多还原

【Abstract】 Based on the engineering background for a part prestressed concrete cable - stayed bridge in Chang Cheng expressway, The paper adopt the constrained least square method to identify main parameter for computer model in construction stage. The objective function is to make the square sum of girder elevation errors least, and the constrained condition is parameter adjustment value. The problem is solved by means of Matlab optimum function, and the modified parameter value in accordant to engineering practice will be attained. The engineering example proves that the parameter identification method will make the computer model accordant to the practice structure, and better control to construction stage will be achieved.更多还原