摘要
针对青岛北站西广厅的振动舒适度和结构地震响应过大的问题,建立了整体有限元模型,对结构进行了动力特性分析。以IABSE建议的单人步行激励荷载为基础,确定了分析工况,并对该观景平台进行了人行荷载模拟,通过时程分析法对其进行了振动舒适度分析,结果表明,利用该方法设计MTMD减振系统可以有效地控制结构的竖向振动,最大减振率达到50.56%,同时也使各个工况的加速度峰值达到了控制目标。屈曲约束支撑(BRB)在地震时有良好的耗能能力、延性和滞回性能,采用BRB减震体系后的分析计算结果表明,屈曲约束支撑在罕遇地震作用下通过自身的耗能降低了结构自身的地震响应;同时,屈曲约束支撑的滞回曲线饱满,说明耗能充分,从而有效改善了结构的抗震性能,显著提高了结构的抗震承载能力。
Considering the problem of vibration serviceability and large seismic response of west-wide hall of Qingdao North Railway Station, a finite element model was established and the vibration properties of the structure were analyzed. Based on the IABSE data of single person walking loading, analysis working conditions were determined and the human-induced loading of the viewing platform was simulated. Then the vibration serviceability of the structure was analyzed by time history analysis method. The results show that the MTMD system designed by this method can control the vertical vibration of the structure effectively with maximum vibration reduction rate of 50.56% , and peak values of the acceleration in each working condition reach the control target. The Buckling-Restrained Brace（BRB） has good energy dissipation ability, ductility and hysteretic behavior during earthquake. Analysis and calculation results show that the seismic response of the structure is reduced by the energy dissipation of the BRB under rare earthquake, and the plump hysteretic curves show good energy dissipation performance, so the BRB can effectively improve seismic performance and seismic bearing capacity of the structure.
出处
《建筑结构》
CSCD
北大核心
2013年第23期17-22,46,共7页
Building Structure
基金
国家自然科学基金项目"高铁站房大跨楼盖结构随机人群荷载效应及其MTMD减振控制研究"(51278106)
江苏省建设厅基金项目"新型建筑结构体系关键技术研究与示范"(7605000023)
关键词
青岛北站
人体舒适度
多重调频质量阻尼器
屈曲约束支撑
耗能
弹塑性分析
Qingdao North Railway Station
human serviceability
MTMD
Buckling-Restrained Brace
energy dissipation
elastic-plastic analysis
