摘要
针对某大跨度钢筋混凝土楼盖的舒适度问题,采用SAP 2000建立有限元模型进行动力时程分析,对其在跳跃荷载作用下的动力响应特性进行了研究,并分析了结构阻尼比、荷载加载模式、荷载频率等因素对结构动力响应的影响。研究表明:阻尼比越小、荷载密度越大、接触比越小,楼盖竖向振动反应越大,荷载布置在跨中及其附近对楼盖舒适度较为不利。本文研究可为类似大跨度楼盖振动舒适度的分析、控制和设计提供借鉴和参考。
The vibration response of the long-span floor under jumping load is studied through selecting the model of a long-span RC floor as the research objective.With the help of the FEM software SAP 2000,the vibration response of the long-span floor are computed and analyzed with different factors such as damping ratio,additional load,load arrangement and load frequency.The results indicate that,the less damping ratio and contact ratio are and the bigger human load density is,the bigger the vibration response of floor is.The unfavorable load arrangement is that the load is on the middle of floor.The study described in this paper can provide an important reference for the analysis,control and design serviceability of similar long-span floors.
出处
《工程抗震与加固改造》
北大核心
2013年第6期64-67,103,共5页
Earthquake Resistant Engineering and Retrofitting
关键词
大跨度楼盖
振动舒适度
跳跃荷载
时程分析
long-span floor
vibration serviceability
jumping load
time-history analysis
