考虑人-结构动力相互作用螺旋楼梯人致振动舒适度评估  

Serviceability evaluation of human induced vibration of spiral stair based on human-structure dynamic interaction

作　　者：杜永峰[1,2] 陈凯[1] 朱前坤[1,3] 刘路路[1] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [3]大连理工大学建设工程学部,辽宁大连116024

出　　处：《兰州理工大学学报》2017年第2期115-120,共6页Journal of Lanzhou University of Technology

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);甘肃省高等学校科研项目(2015B-034)

摘　　要：为研究人致激励下大跨柔性钢楼梯的振动舒适度问题,利用有限元软件ANSYS对某360度螺旋钢楼梯进行有限元建模,对该模型进行静力分析.在保证该模型满足强度和变形的前提下,又对其进行振动舒适度分析.在总结舒适度评价方法的基础上,建议使用结构的固有频率和振动峰值加速度来控制结构的整体刚度.通过对结构进行在人行激励作用下的动力时程分析,建议在评估柔性钢楼梯人致振动舒适度时应考虑人-结构动力相互作用.In order to study the problem of serviceability of human-excited vibration of spira! steel stair, the finite element software ANSYS was used to conduct finite element modelling of a 360-degree spiral steel stair and the static force analysis of the model was carried out. Under the premise that this model meets the requirement of the strength and deformation for sure, the vibration serviceability analysis of the model was carried out as well. Based on the summarization of evaluation method, it was suggested that the natural vibration frequency and peak acceleration should be used for control of the overall stiffness of the structure. By means of dynamic time-history analysis of the structure under the action of human walking excitation, it was suggested that the human-structure dynamic interaction should be taken into considera- tion when the vibration serviceability was evaluated.

关 键 词：螺旋钢楼梯 振动舒适度 固有频率 峰值加速度 人-结构动力相互作用 

分 类 号：TU311.3[建筑科学—结构工程] TU391