节点刚度对装配式钢结构看台动力性能影响分析  

EFFECTS OF JOINT STIFFNESS ON THE DYNAMIC CHARACTERISTICS OF THE PREFABRICATED STEEL GRANDSTANDS

作　　者：陆越 陈鑫[1] 孙勇[2] 于安林[1] 俞伟根[2] 李翔[3] LU Yue;CHEN Xin;SUN Yong;YU Anlin;YU Weigen;Li Xiang(Jiangsu Province Key Laboratory of Structure Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;Jiangsu Research Institute of Building Science Co.Ltd,Nanjing 210008,China;China Jingye Engineering Corporation Limited,Beijing 100088,China)

机构地区：[1]苏州科技大学江苏省结构工程重点实验室,江苏苏州215011 [2]江苏省建筑科学研究院有限公司,南京210008 [3]中国京冶工程技术有限公司,北京100088

出　　处：《工业建筑》2018年第8期169-175,共7页Industrial Construction

基　　金：国家自然科学基金项目(51408389);江苏省自然科学基金项目(BK20140281,BK20161581);江苏省“青蓝工程”;苏州科技大学研究生创新项目(SKCX16_039)

摘　　要：根据某赛事场馆改造中采用的装配式钢结构看台的特点,建立了三维有限元模型,并讨论了装配式钢结构看台节点的合理取值范围,分析了节点刚度对结构静力响应的影响;随后,研究了节点刚度对结构动力特性的影响,并通过数值拟合了结构动力特性随节点刚度和横向支架榀数的变化规律;最后,分析了起立、步行和跳跃荷载下的结构响应在不同节点刚度时的变化,提出了看台座椅面层变形和舒适度分析的简化计算方法。结果表明：节点刚度对装配式钢结构看台静力和动力响应影响较小,但对结构自振频率的影响最大可达30%。所提出的简化设计方法中位移调整系数为1.0,加速度调整系数为1.2,该方法具有一定的可靠性和实用性。According to the characteristics of a prefabricated steel grandstands for a sport stadium,the finite element model of the structure was established. Then the rational range of the joint stiffness of the prefabricated steel grandstands was discussed,and the influence of joint stiffness on the structure＇s static responses was analyzed. The effects of joint stiffness on structural dynamic characteristics were investigated,and the variation law of the dynamic characteristics,which was related to joint stiffness and number of the lateral support truss,are fitted numerically.Finally the variations of the structural responses with different joint stiffness were analyzed,when subjected to standing-up,walking and jumping loads. And a simplified calculation method was proposed for the analysis on seating surface＇s deformation and human comfort. The results showed that the joint stiffness had only a little influence on the static and dynamic responses of the prefabricated steel grandstands,but its impact on modal frequency could reach about 30%. The adjusting coefficients for displacements and accelerations were 1. 0 and 1. 2,the method had a certain reliability and practicability.

关 键 词：装配式看台 钢结构 节点刚度 动力荷载 舒适度 

分 类 号：TU311.3[建筑科学—结构工程] TU391