地震与风作用下钢框架‑自复位支撑筒结构损伤分析
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TU311.3; TU312+.1

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国家自然科学基金资助项目(52125804,52208455)


Damage analysis of steel frame self‑centering braced tube structure under the action of earthquake and wind
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    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/s2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。

    Abstract:

    In order to reveal the damage distribution law of self?centering braced structure under simultaneous and successive ac tions of earthquake and wind, the damage of beams and columns and global damage of a 50?story steel frame self?centering braced tube structure are analyzed under earthquakes with different intensities and wind with a return period of fifty years. The results indi cate 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 simultane ous 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/s2, 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 se verely damaged member in seismic damaged structure.

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徐龙河,刘媛媛,谢行思.地震与风作用下钢框架‑自复位支撑筒结构损伤分析[J].振动工程学报,2025,38(1):126~134.[XU Longhe, LIU Yuanyuan, XIE Xingsi. Damage analysis of steel frame self‑centering braced tube structure under the action of earthquake and wind[J]. Journal of Vibration Engineering,2025,38(1):126~134.]

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  • 在线发布日期: 2025-02-09
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