某梁式钢楼梯在人致激励下的振动舒适度分析  

Vibration serviceability analysis of a beam-typed steel stair under human induced excitation

作　　者：朱前坤[1,2] 陈凯[1] 张举涛 杜永峰[1] 

机构地区：[1]兰州理工大学防震减灾研究所,兰州730050 [2]大连理工大学建设工程学部,大连116024 [3]甘肃省建筑设计研究院,兰州730050

出　　处：《建筑结构》2015年第19期53-57,共5页Building Structure

基　　金：国家自然科学基金(51508257);甘肃省青年科技基金(2013GS09576);甘肃省建设科技攻关项目(JK2014-37)

摘　　要：梁式钢楼梯除了需满足强度和变形要求外,还应该满足振动舒适度的要求。利用ANSYS软件对某梁式钢楼梯进行了有限元分析,建议使用楼梯上的人行激励模型进行动力时程分析,同时分别以峰值加速度、均方根加速度和振动加速度级等三种指标对该楼梯进行了舒适度分析。结果表明,梁式钢楼梯采用不同指标时舒适度分析结果存在差异,增大钢楼梯踏步板厚度能有效减小梁式钢楼梯的动力响应。In addition to the strength and deformation demands, beam-typed steel stair should also meet the requirement of vibration serviceability. Finite element software ANSYS was used to analyze a beam-typed steel stair. It was recommended to use the human induced excitation model on stairs to carry out dynamic time-history analysis. And three different indicators should be applied to analyze serviceability for the stair, including respectively the peak acceleration, the mean square root acceleration and the vibration acceleration level. The results show that serviceability analysis results are different under different indicators for the beam-typed steel stair. Moreover, increasing the thickness of the steel stair treads can effectively reduce its dynamic response.

关 键 词：梁式钢楼梯 振动舒适度 峰值加速度 均方根加速度 加速度振级 

分 类 号：TU391[建筑科学—结构工程]