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以中车科技文化展示中心为工程背景,对大跨度钢管桁架组合楼盖开展了人致振动舒适度研究。采用SAP 2000对楼盖进行模态分析和各种不利工况作用下的动力响应分析,重点研究行走、跑步、跳跃、起立等激励下楼盖的动力时程响应,得到相应的竖向振动峰值加速度,并与选取的舒适度评价标准对比。研究表明:该楼盖结构的人致振动舒适度满足设计要求;在跳跃、跑步等有节奏运动激励下,楼盖的振动响应较大;激励荷载的高阶谐波分量能引起楼盖的共振;分析人致振动舒适度应考虑建筑功能划分。
Based on the project of Zhongke Technology Cultural Exhibition Center, the human-induced vibration comfort of the long-span steel-truss composite floor was studied. The analysis of dynamic response of the floor under the modal analysis of SAP2000 and various unfavorable conditions is carried out by using SAP2000. The dynamic time-history response of the floor under walking, running, jumping, standing up and so on is mainly studied. The corresponding vertical vibration peak Acceleration, and compared with the selected comfort evaluation criteria. The research shows that the vibration comfort of the floor cover structure meets the design requirements. The vibration response of the floor cover is more excited by the rhythmic movement such as jumping and running. The high-order harmonic components of the excitation load can cause the resonance of the floor cover ; Analysis of people caused by vibration and comfort should be considered architectural division.