基于实际工作状态的多跨悬索桥中间塔静力试验模型设计  

Model design of static experiment for the middle tower of multi-span suspension bridge based on actual working conditions

作　　者：吉林[1] 王陶[2] 吴寒亮[2] 

机构地区：[1]江苏省长江公路大桥建设指挥部,江苏泰州225321 [2]交通运输部公路科学研究院,北京100088

出　　处：《中国工程科学》2012年第5期66-70,共5页Strategic Study of CAE

基　　金：国家科技支撑计划资助项目(2009BAG15B02);交通行业联合科技攻关项目(2008-353-332-180);江苏省"333高层次人才培养工程"专项资助

摘　　要：与传统两塔悬索桥相比,多塔连跨悬索桥中间塔的约束条件、工作环境及荷载作用等均有较大差别,其对全桥安全性和使用性有显著影响。基于泰州大桥的实际工作状态(中间塔的纵向最不利工况),采用静力相似理论设计中间塔缩尺模型。通过对原桥中间塔和试验模型的数值仿真分析,从内力、位移及应变等方面比较分析原桥和试验模型的相似关系,结果表明,以几何尺寸和材料弹性模量为基本相似量所设计的试验模型,能满足中间塔主要静力性能的试验要求。Compared to the tower of common two-span suspension bridges, the middle towers of multi-span suspension bridges have several different characteristics, such as the constraints, service conditions and loads, etc, which affect the safety and applicability of the bridges. In this paper, a small-scale model was designed for the middle tower of Taizhou Bridge, based on its actual working conditions. By the finite element method, the similarities between the experiment and the prototype were investigated from three aspects, including the internal forces, displacements and strains. It is demonstrated from the investigation that, with the geometric size and material modulus as the essential parameters, the designed model herein can satisfy the requirements of mechanical properties of experiment.

关 键 词：悬索桥 中间塔 实际工作状态 相似理论 数值仿真 模型试验 

分 类 号：TM344.1[电气工程—电机]