大跨度楼盖不满足振动舒适度要求时的加固方法  

Retrofitting Method of Large Span Floor Unsatisfied Vibration Servicebility

作　　者：何益斌[1] 伍天甲 沈蒲生[1] 谭浩智[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程抗震与加固改造》2014年第4期106-110,共5页Earthquake Resistant Engineering and Retrofitting

基　　金："十二五"国家科技支撑计划项目(2012BAK15B02)

摘　　要：大跨度楼盖普遍具有跨度大、刚度小、柔性大、阻尼小等特点。使用者在进行有氧健身操等有节奏运动时容易使楼板产生共振,引发楼板竖向振动舒适度问题。本文以有氧健身操过程中的有节奏振动为振动来源,通过对楼板体系振动进行理论计算的方法得到楼板体系特性。采用楼板结构自振频率和加速度限值两个评价指标作为评价标准,实现对有节奏运动引起的楼板振动舒适度的控制。对文献[1]中6.4节不满足舒适度要求的工程案例采用3种方案进行加固,对3种加固方案进行了对比,并对楼盖竖向振动加速度问题进行了讨论。The structures with large span floors, such as gymnasium, always have some characters like large span, small stiffness, large flexibility and small damping. The resonance will be happened when there are some rhythmic activities on it. It would trigger the discomfort caused by longitudinal vibration. In this paper, the floor system characters are obtained using theoretical calculation methods of floor system vibration. The vibration sources is derived from the rhythmic activities of aerobic exercise. Floor system＇s natural frequency and acceleration limitation are considered to control the comfort level of floor vibration occurred by rhythmic activities. Besides, three plans are made to reinforce the unsatisfied engineering case mentioned in the Section 6.4 of the Reference 1. The results of three plans are compared and discussions are carried out to find the influence of vertical vibration acceleration on the servicebility.

关 键 词：舒适度 楼板振动 有节奏运动 自振频率 有效最大加速度 加固 

分 类 号：TU311.3[建筑科学—结构工程]