模块化单元房轻型楼盖人致振动响应与舒适度评价研究

Human-induced Vibration and Comfort Evaluation of Lightweight Floor Systems in Modular Unit House

轻型模块化单元房建筑中常采用冷弯薄壁轻钢龙骨复合预制板面层的组合楼盖系统。然而,该楼盖系统对人致振动响应的敏感度高,且目前缺乏足够的振动性能参考数据。为研究该轻型楼盖的振动性能,基于某实际模块化公寓项目,对建造前工厂试制的初制楼盖和实际工程应用的楼盖分别开展了振动频率和人行激励下的动力响应测试,参考现有规范和指南要求进行了楼盖舒适度评定并给出合理的评价指标建议。结果表明,楼盖的固有频率和人致振动响应受到楼盖跨度和面层刚度的显著影响,且随楼层升高楼盖自振频率降低;相较于纵向行走模式,横向行走模式更易引发楼盖的振动响应;多人非同频行走所引发的振动响应低于多人同频行走。建议以固有频率复合均方根加速度限值为指标,实现对模块化单元房楼盖振动性能的科学有效控制,从而提升模块建筑的居住舒适性,促进模块建筑的推广应用。

In lightweight modular unit house,the modular floors generally use composite systems with cold-formed thin-walled light steel joists and prefabricated panels.However,the lightweight floor system is highly sensitive to human-induced vibration response,and related data on vibration performance is limited.Based on a real modular apartment,the vibration frequency test and humaninduced dynamic response tests were conducted to initially fabricated floors and practically used floors,to investigate the floor vibration performance of light weight modular floors.The comfort performance is evaluated according to existing standards and guidelines,and reasonable evaluation criteria are suggested.Results indicated that the floor span and the surface layer stiffness had a significant impact on the natural frequency and human-induced vibration response.As the floor level increases,the boundary constraining extent decreases,leading to a reduction in floor natural frequency.The floor vibration caused by lateral walking is higher than that under longitudinal walking.The acceleration response of the floor vibration induced by multiple people nonsynchronous walking caused lower floor vibrations than synchrony walking.It is recommended to control the modular floor vibration by imposing limits on the natural frequency and root mean square acceleration responses,and therefore the living comfort of modular building is improved,which can promote the application of modular buildings.