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钢管混凝土系杆拱桥以其突出的优点在中国公路桥梁建设中占有重要地位。对目前钢管混凝土系杆拱桥成桥状态吊杆内力的优化方法进行了回顾,并提出了基于影响矩阵的双重优化法,首先以结构弯曲应变能最小为目标进行优化,然后以吊杆内力方差最小(即吊杆内力均匀)为目标进行优化,最终得到满足要求的成桥状态吊杆内力。该方法力学概念明确,思路清晰,计算方便,成功地应用在苏南地区某下承式钢管混凝土系杆拱桥中,并取得了良好的效果。
With its outstanding advantages, the CFST tied arch bridge occupies an important position in the construction of China’s highway bridges. In this paper, the optimization method of boom internal force of CFST arch bridge at the bridge is reviewed, and the double optimization method based on the influence matrix is proposed. Firstly, the minimum bending strain energy of the structure is optimized. Then, (That is, uniform internal force boom) as the goal of optimization, and ultimately meet the requirements of the state into the bridge boom. The method has clear mechanics concept, clear thinking and convenient calculation, and has been successfully applied to a certain type of CFST arch bridge in southern Jiangsu Province and achieved good results.