基于惯性半径相似岸桥模型的地震试验  

Seismic Experimental Research on Cross Section Radius of Inertia Similar for Dynamic Model of Container Cranes

作　　者：李哲[1] 王贡献[1] 胡吉全[1] 王东[1] 

机构地区：[1]武汉理工大学物流工程学院,武汉430063

出　　处：《振动．测试与诊断》2016年第5期972-978,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51275369)

摘　　要：岸桥结构进行缩尺模型设计时,各构件(梁)的几何尺寸可由原形的尺寸按相似比推导出来,梁截面厚度却不能和长度按同一比尺缩小,导致梁截面尺寸不能完全相似。笔者采用截面惯性半径相似的方法控制抗弯刚度设计梁截面尺寸。以该方法为参考制作了一台岸桥缩尺模型并进行地震试验,缩尺模型试验测量值与数值计算结果接近,结构各考察点加速度、应变出现极值的大小以及所对应的时间都比较接近。该缩尺模型能替代完全相似模型,所得试验值能近似反映实际结构在地震中的动态响应,验证了截面惯性半径相似模型设计方法的可行性,为工程中大型钢结构缩尺模型的设计及后续的地震试验研究提供了参考。According to the dynamic similarity theory, the scale model of a container crane structure was designed, and the length of each component (beam) was similar to the size of the prototype. However, it was difficult to strictly alter cross section thickness according to the same scale. This problem can be effectively solved using the method of cross section radius of inertia similar to design the scale model. A series of finite element time history analysis and seismic sharking table tests were carried out for the prototype finite element model and the scale model. The results showed that the experimental results were close to the calculation results. The maximum acceleration and strain were nearly at the same positions at the same time. This indicates that the response of the scale model can reflect the real structure subject to seismic load and thus verifies the design method, which provides a reference for model design and seismic experimental research. © 2016, Editorial Department of JVMD. All right reserved.

关 键 词：惯性半径 相似理论 岸桥结构 缩尺模型 振动台试验 

分 类 号：U448.21[建筑科学—桥梁与隧道工程] TH13[交通运输工程—道路与铁道工程]