摘要
立式轻工业建筑结构存在大跨度、高空重载及竖向质量分布不均匀等特点,为研究该结构形式的振动响应特征,以某典型立式轻工业生产车间为背景,建立了精细化三维非线性计算模型,通过有限元仿真技术对该结构形式开展抗震性能研究。结果表明:通过合理设计,立式轻工业建筑结构能满足结构抗震设计要求,结构损伤呈由外及里的发展过程,塑性铰分布规律表现为高层多,低层少,重载层多,非重载层少的特点,在抗震设计过程中,应将重载楼层视为薄弱层予以加固,对外侧抗风柱应设置水平及垂直支撑,以延缓内部承载构件的损伤破坏,提高结构的整体抗震性能。此外,当结构存在大质量比可变荷载时,应该考虑其质量变化对结构动力特性的影响;当设备质量占比较小时,可忽略设备与结构之间的相互作用,抗震分析时可采用设备-结构固结模型进行简化计算。
Vertical light industrial building structures exhibit characteristics such as large spans,high-altitude loads,and uneven vertical mass distribution.In order to investigate the vibration response characteristics of this structural form,this paper takes a typical vertical light industrial production workshop as a background and establishes a refined three-dimensional nonlinear computational model.Seismic performance research on this structural form is conducted through finite element simulation technology.The results show that the structure can meet the structural seismic requirements through reasonable design.The structural damage spreads from the outside to the inside.The plastic hinges are distributed more at high levels and less in low levels,and more on heavy load layers and less on non-heavy load layers.In the seismic design process,the heavily loaded floors should be considered as weak floors to be reinforced,and the horizontal and vertical supports should be set in the outer wind-resistant columns to delay the damage of the internal load-bearing members and improve the seismic performance of the structure.In addition,when a large mass ratio variable load exists on the structure,the effect of mass variation on the structural dynamic properties should be considered.When the mass of the equipment is smaller,the interaction between the equipment and the structure can be ignored,and the consolidation model for equipment and structure can be used for simplified calculation during seismic analysis.
作者
吴斌
杨悦
姚仰平
王凇晗
姜雪薇
许立言
WU Bin;YANG Yue;YAO Yangping;WANG Songhan;JIANG Xuewei;XU Liyan(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;School of Transportation Science and Engineering,Beihang University,Beijing 100191,China)
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2024年第4期1240-1250,共11页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家重点研发计划(2018YFC0705700)
国家自然科学基金(51878018,51878379)
博士科研启动金(DC2300001260)。
关键词
立式轻工业建筑
大跨度
高空重载
抗震性能
时程分析
multistory light industrial building
long span
high altitude heavy load
seismic behavior
time history analysis
