三跨下承式钢管混凝土系杆拱桥施工控制研究

Research on construction control of a three-span through CFST tied arch bridge

以某三跨下承式钢管混凝土系杆拱桥为研究对象,采用通用有限元软件ANSYS建立了全桥模型,以拱肋应力、线形、系杆力等参数为控制目标,对该桥的施工全过程进行了数值模拟分析和现场监控。结果表明:通过实施必要的施工监控,该桥成桥后的结构受力和线形均满足设计要求,实桥实测值与有限元计算值的最大偏差率均小于11.4%;各主要构件在施工过程中受力性能均达到设计要求,最大偏差率小于18.9%。

In this paper,the finite element software ANSYS was used to establish a full-bridge model of a three-span through CFST tied arch bridge. Taking the parameters of arch rib stress,linear shape and tie rod force as the control targets,the whole construction process of the bridge was numerically simulated and monitored on site. The results show that by implementing necessary construction monitoring,the structural force and line shape of the bridge after the bridge meets the design requirements,and the maximum deviation between the measured value of the real bridge and the calculated value of the finite element is less than 11. 4%; The performance of each major component in the construction process meets the design requirements,and the maximum deviation rate is less than 18. 9%.