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A Substructure On-Line Earthquake Response Simulation of Steel Frames with Shear Collpase in Middle of Beam

梁中部剪切垮塌钢框架下部结构在线地震响应模拟

基本信息

批准号：
14550488
负责人：
MIKI Toshihiro
金额：
$ 1.41万
依托单位：
Daido Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550488/
关键词：
steel piers web plates of beam shearing buckling earthquake response on-line testing 鋼製ラーメン橋脚

项目摘要

1.Development of Experimantal Device for High Speed Shearing Force1)An experimental device was developed for appling the shearing force to web plates. Four corners of steel square plates correspond to the centre of bearing set in the experimental device.2)Dynamic tests of steel web plates can be performed under the condition of almost pure shearing force.3)Steel web plates can deform up to the large displacement and siginificantly inelastic region corresponding to about hundred times yield shearing strain.2.Experiments on inelastic response of steel web plates under rapid shearing forceFifty square plate specimens with thickness of 2.3, 3.2, 4.5 and 6mm were tested up to dynamic failure under the following shearing force ;1)Statically increasing shearing force2)Statically cyclic shearing force3)Dynamically cyclic shearing force4)Earthquake response analysis based on an on-line experimental method3.Conclusions1)Experimental device was developped for web plates under high speed cyclic shearing force.2)This experimental device can give the rapid shearing force which corresponds to about a hundred and twenty times shearing strain (=about 0.25 rad/s) of steel materials.3)The yield shearing stress in the first hysteresis loop increases due to the increase in strain rate.4)In order to know the real earthquake response of web plates under shearing force, it is necessary to realize the loading condition of rapid shearing force corresponding to about four hundreds times shearing strain of steel materials.

1.高速剪切力实验装置的研制1）研制了腹板剪切力实验装置。试验装置中，钢腹板的四个角与支座中心相对应; 2）钢腹板的动力试验可以在几乎纯剪力的情况下进行;钢腹板的大变形区和显著非弹性区对应于近百倍的屈服剪应变。2.钢腹板在快速剪力作用下的非弹性响应试验分别对厚度为2.3、3.2、4.5和6 mm的板试件在以下剪切力作用下进行动态破坏试验; 1）静力递增剪力2）静力循环剪力3）动力循环剪力4）基于在线试验方法的地震反应分析3.结论1）研制了高速循环剪力作用下腹板的试验装置该实验装置能产生相当于约120倍剪应变的快速剪切力（=约0. 25 rad/s）。3）第一滞回线中的屈服剪应力由于应变率的增加而增加。4）为了了解腹板在剪力作用下的真实的地震反应，必须实现相当于钢材料400倍左右剪切应变的快速剪切力加载条件。