广州猎德大桥施工过程中关键参数的试验研究

Experimental study on the key parameters in construction process of Liede Bridge in Guangzhou

基于广州猎德大桥全桥缩比模型试验,采用两种不同的张拉程序对自锚式悬索桥在体系转换及施加二期恒载施工过程中,对长吊索索力、加劲梁控制截面应力、索塔根部应力等关键参数的变化规律进行了分析和研究.研究结果表明:该桥的各关键参数在体系转换过程中呈现比较显著的非线性变化规律,主要构件安全可靠,吊索张拉程序合理可行,对同类桥梁的设计与施工有一定的借鉴意义.

Based on the scale down model test of the whole bridge of Liede Bridge in Guangzhou,an experimental study on the varying regulars of some key parameters such as the axial force of long suspenders,the stresses in the control sections of stiffened girder and cable tower etc.in the construction process has been carried out by using two kinds of tensioning programs.The study results indicated that each key parameter presented marked nonlinear varying regularity,and the main structural members were safe and reliable with the reasonable and feasible hanger tensioning procedure,which provides some valuable reference for the design and construction of the similar bridges.