空间缆索自锚式悬索桥体系转换过程中受力行为的全桥模型试验研究  

An overall bridge model test study on the mechanical behaviors in the process of system transformation of self-anchored suspension bridge with spatial cable system

作　　者：张俊平[1] 黄海云[1] 刘爱荣[1] 梅力彪[1] 李永河[1] 

机构地区：[1]广州大学,广东广州510006

出　　处：《土木工程学报》2011年第2期108-115,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(50878059)

摘　　要：依据广州猎德大桥1/10比例全桥模型试验的实测数据,系统深入地研究空间缆索自锚式悬索桥体系转换过程中的非线性受力行为,揭示利用叠加原理、按照线性化计算二期恒载及活载效应的合理性,分析主缆变形、吊索索力在体系转换过程中的演变规律,阐明主缆变形、吊索索力变化规律与体系转换状态的相关性,指出吊索索力、主缆位移的弱相干性特征仅适用于加劲梁完全脱架、转换为自平衡体系后的结构状态,得出空间缆索索夹横向扭转角的量值特征与分布规律,指出此扭转角可通过预设偏角予以抵消,提出自锚式悬索桥宜按两阶段进行施工控制,探讨各阶段的施工控制目标与控制目标,为同类桥梁的设计及施工控制提供借鉴。According to the measurement data of a 1/10 overall model test of Liede Bridge in Guangzhou,a systematic and in-depth study of the nonlinear mechanical behaviors of self-anchored suspension bridge in the process of structural system transformation was carried out.It revealed that use of the superposition principle and in accordance with the linearization theory to calculate the action effects of second period dead load and live loads was reasonable.The evolution of the main cable deformation and hanger tensions in the process of structural system transformation was analyzed,which clarified the correlations between the evolution of main cable deformation,hanger tensions and the state of structural system transformation,and pointed out that the weak correlations of the main cable deformation or hanger tensions was only suitable for the states when the stiffen girder had been completely separated from all the supports and the structure system had reached self-balance.The magnitude and distribution of lateral torsion angle of the cable clamp,which could be counteracted by the way of setting a deviation angle in advance,were obtained.It proposed that the method of construction control with two stages was suitable for the self-anchored suspension bridge.The objective of construction control and the control aim of each stage were investigated,and references provided.

关 键 词：自锚式悬索桥 全桥模型试验 体系转换 索力 主缆位移 索夹扭转角 

分 类 号：TU317.1[建筑科学—结构工程] U448.225[建筑科学—桥梁与隧道工程]