地震作用下相邻结构碰撞对结构性能影响研究
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摘要
在地震中,房屋结构间的碰撞是一种常见的震害,相邻结构高度相差较大时碰撞后果更为严重。采用简化的Hertz-damp碰撞模型,对两相邻8层和3层钢筋混凝土框架结构间的地震碰撞进行了数值模拟和参数研究.研究表明:碰撞对结构的位移、柱底剪力都产生了很大影响,并在楼层位置产生很大的碰撞力和加速度脉冲,间隙比和周期比是影响碰撞的两大重要因素.
Seismic induced pounding between adjacent structures is the common damage during earthquake.It is even move serious when a great height difference exists between adjacent structures.A simplified Hertz-damp contact model is applied to simulate the seismic pounding between two adjacent 8-story and 3-story reinforced concrete structures,and the parameters are studied.Results show that the seismic induced pounding has great influence on the structural displacement and the shear force on the column bottom.A great pounding force and acceleration pulse can be caused.Results also show that the separation ratio and period ratio are two important facts that affect the pounding.
Seismic induced pounding between adjacent structures is the common damage during earthquake.It is even move serious when a great height difference exists between adjacent structures.A simplified Hertz-damp contact model is applied to simulate the seismic pounding between two adjacent 8-story and 3-story reinforced concrete structures,and the parameters are studied.Results show that the seismic induced pounding has great influence on the structural displacement and the shear force on the column bottom.A great pounding force and acceleration pulse can be caused.Results also show that the separation ratio and period ratio are two important facts that affect the pounding.
引文
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[2]Rosenblueth E,Meli R.The 1985 earthquake:causes and effects in Mexico city[J].Concrete International,1986,8(5):23-34.
[3]Kasai K,Maison B F.Building pounding damage during the 1989 Loma Prieta[J].Earthquake Engineering Structures,1997,19:195-207.
[4]孟庆利,徐盛增.相邻结构地震碰撞研究简述[J].世界地震工程,2003,19(4):68-72.Meng Qingli,Xu Shengzeng.Asimplified reviewon the seismic pounding of adjacent buildings[J].WorldEarthquake Engi-neering,2003,19(4):68-72.(in Chinese)
[5]丁文胜,孙福全.纵向地震作用下系杆拱桥与引桥间碰撞响应研究[J].江苏科技大学学报:自然科学版,2007,21(2):25-29.Ding Wensheng,Sun Fuquan.Analysis of pounding effect of longitudinal ground motion on tie arch bridge and side span[J].Journal ofJiangsu UniversityofScience and Technology:Natural Science Edition,2007,21(2):25-29.(in Chinese)
[6]李忠献,岳福青.城市桥梁地震碰撞反应研究与发展[J].地震工程与工程振动,2005,25(4):91-98.Li Zhongxian,Yue Fuqing.State of arts of study on seismic pounding responses of urban bridges[J].Earthquake Engineer-ing and Engineering Vibration,2005,25(4):91-98.(in Chinese)
[7]Muthukmar S.A contact element approach with hysteresis damping for the analysis and design of pounding in bridges[D].USA:Georgia Institute of Technology,2003.
[8]邹宏德,蓝宗建.相邻建筑结构碰撞问题的探讨[J].工业建筑,2002,32(4):49-52.Zou Hongde,Lan Zongjian.Discussion on structural collision between adjacent buildings[J].Industral Construction,2002,32(4):49-52.(in Chinese)
[9]Susendar M,Reginald D R.A Hertz contact model with non-linear damping for pounding simulation[J].Earthquake Engi-neering and Structural Dynamics.2006,35:811-828.