地震与风作用下钢框架-自复位支撑筒结构损伤分析  

Damage analysis of steel frame self⁃centering braced tube structure under the action of earthquake and wind

作　　者：徐龙河[1] 刘媛媛 谢行思 XU Longhe;LIU Yuanyuan;XIE Xingsi(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《振动工程学报》2025年第1期126-134,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(52125804,52208455)。

摘　　要：为揭示地震‐风同时作用和先后作用下自复位支撑结构的损伤分布规律,对一50层钢框架‐自复位支撑筒在不同强度地震动与50年重现期风荷载下的梁/柱构件和结构整体损伤进行分析。结果表明,地震单独作用和地震‐风同时作用下,支撑筒梁均比外框架梁先受损,支撑筒柱较外框架柱损伤发展更快;地震‐风同时作用增大了柱的损伤程度,使31层柱的最大损伤值增大了78.6%;随着地震动强度的增大,风荷载作用对结构整体损伤的加重程度逐渐增大。在不同强度的地震动与50年重现期风荷载先后作用下,风荷载增大了震损结构的最大残余变形角均值;当峰值地面加速度为10 m/s^(2)时,风荷载使震损结构的最大残余变形角均值由0.325%增至0.330%,但风荷载对震损结构损伤最大构件的损伤状态影响不大。In order to reveal the damage distribution law of selfcentering braced structure under simultaneous and successive actions of earthquake and wind,the damage of beams and columns and global damage of a 50story steel frame selfcentering braced tube structure are analyzed under earthquakes with different intensities and wind with a return period of fifty years.The results indicate that under earthquake alone and under simultaneous action of earthquake and wind,beams in braced tube are damaged earlier than those in exterior frame,and the damage of columns in braced tube develops faster than those in exterior frame.The simultaneous action of earthquake and wind increases the damage degree of columns and increases the maximum damage value of columns at the 31st story by 78.6%.As earthquake intensity increases,the amplification influence of the action of wind on structural global damage increases gradually.Under successive action of earthquake with different intensities and wind with a return period of fifty years,the action of wind increases the average value of maximum residual deformation ratio of seismic damaged structure.When the peak ground acceleration is 10 m/s^(2),the average value of maximum residual deformation ratio of seismic damaged structure is increased from 0.325%to 0.330%caused by wind load.However,wind load has less influence on the damage state of the most severely damaged member in seismic damaged structure.

关 键 词：损伤识别 地震‐风耦合作用 自复位支撑 高层钢结构 残余变形 

分 类 号：TU311.3[建筑科学—结构工程] TU312.1