摘要
因微振动控制要求,某工程风振作用下结构底板振动位移控制量级为纳米级别。基于结构风洞试验数据结果,建立有限元模型,利用abaqus分析风荷载时程激励作用下结构底板的振动位移响应。研究上部结构在不同柱截面尺寸、柱材料强度及桁架高度影响因素下对底板风振响应的影响;结果表明,材料及桁架高度影响显著,柱截面尺寸影响较小。根据最终参数建模,计算所选X1及Y1两条测线下的底板振动位移响应;结果表明,距离桁架两侧柱越远,底板竖向振动位移响应越小,而水平向振动位移响应变化不大。最终选择M1及M10两测点在各个风向角下的底板振动位移响应,计算结果表明,底板最大位移满足风振控制要求。
Due to the requirements of micro-vibration control,the vibration displacement control level of the structural floor under the action of wind vibration of a project is nanometer level.Based on the results of structural wind tunnel test data,a finite element model is established to analyze the vibration displacement response of the structural floor under wind load time history excitation by ABAQUS.The influence of superstructure on the wind vibration response of the floor under the influence factors of different column cross-sectional dimensions,column material strength and truss height was studied.The results show that the material strength and truss height have a significant influence,and the column cross-sectional dimensions have little influence.According to the final parameter modeling,the vibration displacement response of the bottom plate under the selected X1 and Y1 measurement lines was calculated.The results show that the farther away from the columns to both sides of the truss,the smaller the vertical vibration displacement response of the bottom plate,while the horizontal vibration displacement response does not change much.Finally,the vibration displacement response at observation points,M1 and M10 in each wind direction angle is selected,and the calculation results show that the maximum displacement of the floor meets the requirements of wind vibration control.
作者
刘洋阳
LIU Yangyang(Shanghai Institute of Architectural Design and Reaserch Co.,Ltd.,Shanghai 200041,China)
出处
《建筑结构》
北大核心
2023年第S02期2170-2174,共5页
Building Structure
基金
上海市科委课题《新一代大科学装置超大超长空间高精度恒温控制与纳米级振动控制关键技术研究》(21DZ1203100)。
关键词
风振响应
参数分析
微振动
有限元
环形建筑
wind vibration response
parametric analysis
micro-vibration
finite elements
ring building
