钢管混凝土拱桥参数误差识别与修正

Parameters Error Identification and Correction of Arch Bridge

针对钢管混凝土拱桥实际施工中计算参数的取值与计算模型的假设值总会有一定偏差的问题,利用最小二乘原理结合倒装分析法进行控制参数的误差识别,通过举例分析参数实际值与参数修正值的差值,验证了对参数进行修正后,可以有效地提高参数估计值的精度,使得计算模型更加接近实际结构受力情况,更加精确的指导施工.

In the construction of concrete-filled steel-tubular arch bridge,the actual parameter value always deviates from the simulated parameters of the computer model. The error estimation of the control parameters is carried out by using the least squares principle combined with the flip-chip analysis method. Through the example analysis,the recognition is compared between the true value of parameters and the parameters to be iteratively corrected. It is testified that the modified parameters can effectively promote the accuracy of parameter estimation.Therefore,through the parameter identification and correction,the forecasting model can be established to better guide the construction in an orderly manner.