摘要
从构件安全层次考虑,提出了基于传力路径优化配置消能支撑的减震设计方法。采用广义结构刚度法计算结构系统中所有构件的重要性系数,在假定支撑截面参数后,取每层构件重要性系数最大的位置布置消能支撑,经支撑的最不利地震组合轴力验算确定支撑的最终参数和数目,并考虑远场、近场有脉冲、近场无脉冲地震动对结构的影响,对结构进行双向地震输入下的动力时程分析。计算结果表明,利用此方法布置支撑能有效保护在传力路径中占重要位置的构件,使消能支撑在小、中、大震下均能发挥良好性能,并能很好地控制整体结构响应。
In consideration of the safety of structural elements,some suggestions for application of energy dissipation method,which is the optimal allocation method of energy dissipation braces based on the load path are put forward. All the element importance indexes of structural system are calculated. After assumed brace section parameters,and then energy dissipation braces are arranged in these locations where element importance indexes are maximal on each floor. The final brace parameters and amounts are derived after checking axial forces in most unfavorable conditions with consideration of seismic,the structure is analyzed by time-history analysis method. in this process,three different conditions which are divided by the earthquake fault distance are considered,including far-field ground motions,near-field ground motion with pulse and near-field ground motion without pulse. The analysis results show that this allocation method can provide an effective protection to the most important members in the structural load path. The energy dissipation braces can also work well in different earthquake intensities,meanwhile,the structural seismic response is well controlled.
作者
杜永峰
张文丽
黄小宁
Du Yong-feng Zhang Wen-li Huang Xiao-ning(Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology,Lanzhou 730050, China)
出处
《工程抗震与加固改造》
北大核心
2017年第1期64-70,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(51578274)
关键词
传力路径
减震设计
广义结构刚度法
构件重要性系数
load path
energy dissipation design method
generalized structural stiffness
element importance index
