简谐荷载作用下井字梁楼盖减振加固方案研究  

Study on vibration reduction scheme of cross beam slab under harmonic load

作　　者：姚宗健[1,2] 张林 姜娜 杨沁恬 刘润广 Yao Zong-jian;Zhang Lin;Jiang Na;Yang Qin-tian;Liu Run-guang(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering Ministry of Education,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东建筑大学建筑结构加固改造与地下空间工程教育部重点实验室,山东济南250101

出　　处：《工程抗震与加固改造》2023年第4期148-155,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(51308327);山东建筑大学工程鉴定加固研究院有限公司科研项目(2020-KY008)。

摘　　要：对某工业厂房井字梁楼盖进行现场动力特性测试,基于测试结果采用ABAQUS软件建立局部井字梁楼盖模型。研究简谐荷载作用下井字梁楼盖的振动特性,提出增加井字梁楼盖刚度的几种减振加固方案。结果表明:通过增加梁高、板厚和新增次梁,楼盖竖向振动峰值加速度均可减小。其中增加梁高方案中同时增加主次梁高度效果较好;新增次梁方案中将次梁布置在设备支座处减振加固效果明显。The dynamic characteristics of a cross beam slab in an industrial workshop are tested.Based on the test results,ABAQUS software is used to establish a local cross beam slab model.The vibration characteristics of the cross beam slab under the action of simple harmonic load are studied and several vibration reduction schemes to increase the stiffness of the floor slab are proposed.The results show that the peak acceleration of vertical vibration of the floor can be decreased by increasing of beam height,plate thickness and adding secondary beam;in the scheme of increasing beam height,the effect of increasing the height of primary and secondary beams at the same time is better;in the newly added secondary beam scheme,the secondary beam is arranged at the equipment support and the vibration reduction effect is obvious.

关 键 词：井字梁楼盖 简谐荷载 竖向振动峰值加速度 减振加固 

分 类 号：TU375.2[建筑科学—结构工程]