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基于风致响应的高层建筑等效静力荷载研究

林拥军 林池锬 刘先明 张晶 宋吉荣

林拥军, 林池锬, 刘先明, 张晶, 宋吉荣. 基于风致响应的高层建筑等效静力荷载研究[J]. 西南交通大学学报, 2019, 54(1): 137-144, 188. doi: 10.3969/j.issn.0258-2724.20170654
引用本文: 林拥军, 林池锬, 刘先明, 张晶, 宋吉荣. 基于风致响应的高层建筑等效静力荷载研究[J]. 西南交通大学学报, 2019, 54(1): 137-144, 188. doi: 10.3969/j.issn.0258-2724.20170654
LIN Yongjun, LIN Chitan, LIU Xianming, ZHANG Jing, SONG Jirong. Research on Equivalent Static Load of High-Rise Buildings Based on Wind-Induced Responses[J]. Journal of Southwest Jiaotong University, 2019, 54(1): 137-144, 188. doi: 10.3969/j.issn.0258-2724.20170654
Citation: LIN Yongjun, LIN Chitan, LIU Xianming, ZHANG Jing, SONG Jirong. Research on Equivalent Static Load of High-Rise Buildings Based on Wind-Induced Responses[J]. Journal of Southwest Jiaotong University, 2019, 54(1): 137-144, 188. doi: 10.3969/j.issn.0258-2724.20170654

基于风致响应的高层建筑等效静力荷载研究

doi: 10.3969/j.issn.0258-2724.20170654
基金项目: 国家重点研发计划资助项目(2016YFC0802205,2016YFB0303603-4);中央高校基本科研业务费专项资金资助项目(2682013CX044)
详细信息
    作者简介:

    林拥军(1974—),男,副教授,博士,研究方向为结构抗风与抗震,电话:028-87600640,E-mail: scsmith@126.com

    通讯作者:

    宋吉荣(1961—),男,教授,博士,研究方向为结构优化与项目管理,E-mail: song@swjtu.edu.cn

  • 中图分类号: TU973.213

Research on Equivalent Static Load of High-Rise Buildings Based on Wind-Induced Responses

  • 摘要: 为研究风荷载作用下高层建筑动力响应对其顺风向等效静力风荷载的影响,基于结构风致响应动力学理论、脉动风速功率谱密度函数与相干函数的维纳辛钦关系及脉动风速准定常关系,采用随机振动振型分解方法对高层建筑的风致响应进行了研究. 首先,对高层建筑的平均风响应、背景风响应和共振风响应进行了理论分析,并推导出了沿结构高度分布的高层建筑顺风向等效静力风荷载理论计算公式;其次,通过对理论公式中各参数对计算结果的影响进行分析,提出了便于实际应用的高层建筑顺风向等效静力风荷载简化计算方法;最后,设计了4个典型高层建筑算例模型,并与阵风荷载因子法(gust load factor method,GLF)和惯性风荷载法(inertial wind load method,IWL )进行对比,研究了本文方法的可靠性和有效性. 研究结果表明:当结构高度小于250 m时,3种方法所计算出的分布风力、剪力响应和弯矩响应偏差要大一些,GLF法计算结果最大,IWL法的计算结果最小,本文方法介于二者之间;当结构高度大于350 m时,分布风力的偏差在15%以内,对于剪力响应和弯矩响应的偏差在10%以内;本文方法与IWL法在剪力响应方面的差异率在–1%~18%之间,与GLF法的差异率在–12%~5%之间;本文方法与IWL法在弯矩响应方面的差异率在–6%~10%之间,与GLF法的差异率在–16%~5%之间.

     

  • 图 1  分布风力、剪力响应和弯矩响应计算结果

    Figure 1.  Calculation results of distribution wind force,shear response and moment response

    图 2  分布风力、剪力响应和弯矩响应偏差比

    Figure 2.  Deviation ratios of distribution wind force,shear response and moment response

    图 3  本文方法计算剪力响应的差异率

    Figure 3.  Difference rate of shear response to use this method

    图 4  本文方法计算弯矩响应的差异率

    Figure 4.  Difference rate of bending moment response to use this method

    表  1  算例模型参数

    Table  1.   Example model parameters

    算例
    模型
    高度/m 迎风面
    宽度/m
    基频
    /Hz
    阻尼比 基本风
    压/kPa
    地貌
    EM1 100 35 1.31 0.05 0.8 D
    EM2 250 45 1.12 0.04 0.65 C
    EM3 350 55 1.01 0.03 0.45 B
    EM4 500 70 0.96 0.02 0.30 A
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出版历程
  • 收稿日期:  2017-09-01
  • 修回日期:  2017-10-31
  • 网络出版日期:  2018-05-14
  • 刊出日期:  2019-02-01

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