万州长江大桥欠质量模型振动台试验研究
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摘要
大跨结构的地震模拟振动台试验常因台面尺寸的影响而采用小比例模型,再加上材料的力学性能往往难以满足配重要求从而使试验变得比较困难,因而不得不选用欠质量试验模型作为研究对象。根据万州长江大桥跨长的特点,以1∶100欠质量模型为研究对象,进行了地震模拟振动台试验和三维有限元分析,通过实测值和理论值的对比分析,得出了正确的计算模型和动力分析方法,为该桥的进一步研究奠定了可靠的基础。
The shaking table test researches on aseismic behaviors of large-span structures often adopt small-scale models because of the influences of table sizes, moreover, the mechanical performances of materials frequently fail to meet the demands of loads. These facts usually result in difficulties in such tests, so insufficient-mass models have to be chosen as the objects in these tests consequently. In view of the large-span structure of the Wanzhou Yangtze River Bridge, a 1∶100 scale insufficient-mass model was examined by the 3-D finite element analyses and tested on the shaking table. This paper analyzed and compared the experimental values and theoretical values, and presented a correct calculation model and a dynamic analysis approach which would lay a solid foundation for further researches into the bridge.
The shaking table test researches on aseismic behaviors of large-span structures often adopt small-scale models because of the influences of table sizes, moreover, the mechanical performances of materials frequently fail to meet the demands of loads. These facts usually result in difficulties in such tests, so insufficient-mass models have to be chosen as the objects in these tests consequently. In view of the large-span structure of the Wanzhou Yangtze River Bridge, a 1∶100 scale insufficient-mass model was examined by the 3-D finite element analyses and tested on the shaking table. This paper analyzed and compared the experimental values and theoretical values, and presented a correct calculation model and a dynamic analysis approach which would lay a solid foundation for further researches into the bridge.
引文
[1]中铁大桥勘测设计院.新建铁路宜万线万州长江特大桥主桥动力特性和抗震性能试验研究的技术要求[R].武汉:中铁大桥勘测设计院,2003.
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[4]章关永.桥梁结构试验[M].北京:人民交通出版社,2002.
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[2]赵斌,卢文胜,吕西林,等.超高层剪力墙(短肢剪力墙)-筒体结构整体模型振动台试验研究[J].建筑结构学报,2004,25(3):14~21.
[3]李德寅,王邦楣.结构模型试验[M].北京:科学出版社,1996.
[4]章关永.桥梁结构试验[M].北京:人民交通出版社,2002.
[5]陈蜀俊,王清云.新建铁路宜万线万州长江特大桥工程场地地震安全性评价报告[R].武汉:中国地震局地震研究所,2002.
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