大跨度拱形钢塔斜拉桥模型试验研究  

Experimental Study on Model of Long-span Cable-stayed Bridge with Arch-shaped Steel Pylon

作　　者：曹一山[1] 徐强[1] 李克冰[2] 

机构地区：[1]交通运输部公路科学研究所,北京100088 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《公路交通科技》2016年第5期73-77,共5页Journal of Highway and Transportation Research and Development

基　　金：中央级公益性科研所基本科研业务费专项资金项目(2015-9020);浙江省交通运输厅科技计划项目(2011H17)

摘　　要：为了对大跨度拱形钢塔斜拉桥的力学行为特性进行分析和试验验证,以之江大桥为工程背景对此类结构进行了模型试验研究。首先介绍了试验模型的设计,并通过试验模型的有限元模拟,证明了试验模型能很好地反映实际结构的受力性能。最后对组装成桥的试验模型,进行了4个工况的加载试验,并以中跨跨中最大弯矩的工况为例对主塔应力和主梁变形的试验结果进行了分析,分析结果表明实测数据与实桥计算结果折算值较为接近,实际结构有较大的安全储备。In order to analyse and experimental verify the mechanical behavior characteristics of long-span cable-stayed bridge with arch-shaped steel pylon,taking Zhijiang river bridge as the engineering background,the model of this kind of structure is experimental researched. First,the design of the test model is introduced,then it is proved that the test model can well reflect the mechanical performance of actual structure by finite element simulation of the test model. Finally,the loading test on the test model of the assembled bridge under 4 conditions. Taking the condition of maximum bending moment of mid-span of central span for example,the test result of main pylon stress and main girder deformation are analysed. The result shows that the measured data are closer to the converted values of the real bridge calculation,and the actual structure has higher safety reservation.

关 键 词：桥梁工程 钢拱塔斜拉桥 模型试验 受力特性 弯矩 

分 类 号：U448[建筑科学—桥梁与隧道工程]