大跨度钢管拱吊装中温度荷载效应分析及应用

为研究支井河大桥钢管拱安装过程中温度荷载对拱肋的影响规律,运用ANSYS软件的参数设计语言APDL建立空间有限元模型,对多种温度变化工况和实测温度分布工况进行计算分析和比较研究。该方法综合考虑扣索温度和拱肋构件的非线性温差,根据等效线性化原则把非线性温差等效为线性温差,建立有限元模型并求解。分析结果表明,日照作用下的非线性温差是影响拱肋安装精度的主要原因,并且揭示了拱肋在日照温差影响下引起拱肋状态变化的规律,为拱肋吊装的施工控制提供参考。

Theory analysis and application on temperature load effects of large span CFST arch ribs under construction

To research the law of temperature load effects during the installation of the steel tubular arch ribs of the Zhijing Bridge, a computational analysis and comparative study was done for a variety of working conditions of temperature changes and the measured temperature in site using a space finite element model established by ANSYS parametric design language. This method integrates the perspectives of bukle′s temperature and arch ribs′ nonlinear temperature, and establishes the finite element model according to the principle of equivalent linearization of the nonlinear temperature. The results showed that the nonlinear temperature under sunlight affects the accuracy of the main arch ribs installation, and reveals the changes law  of arch ribs under the sunlight affect, which could provide a reference for the installation of CFST arch ribs.