RC框架-剪力墙结构的框架地震层剪力分配
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摘要
我国《建筑抗震设计规范》与《高层建筑混凝土结构技术规程》关于框架-剪力墙结构地震层剪力分配的规定是依据设计经验提出来的,并没有考虑框架与剪力墙各自抗侧刚度比值的影响,因而较为笼统,明显欠缺合理性。连续化分析方法中框架-剪力墙结构的刚度特征值是表征框架-剪力墙受力和变形的重要指标。本文采用静力弹塑性分析(Pushover)方法和动力弹塑性时程分析方法对刚度特征值为1.0～4.5的8栋框架-剪力墙结构进行了全过程研究,得到了多遇、基本和罕遇地震作用下不同刚度特征值的框剪结构楼层剪力分配,以及罕遇地震下剪力墙刚度退化对楼层剪力分配的影响,并给出了框架层剪力分配公式供设计参考。
The provisions about the distribution of seismic shearing force of frame shear wall structures in《Code for seismic design of buildings》and《Technical specification for concrete structures of tall building》in our country are based on domestic and foreign design experience,however the lateral stiffness ratio of frame and shear wall are not including in their consideration. For solving this problem, this paper states that the seismic response on several buildings, which have 8-frame-sheared wall structure,with stiffness characteristic values arranging from 1.0 to 4.5,by the application of static elastic-plastic analysis method(Pushover)and dynamic time-history method. This study summarizes that different stiffness value of storey shearing force is distributed on frame-shear wall structure under different frequency of earthquake. The influence of shear wall stiffness degradation on the distribution of storey shearing force is also mentioned in this article. The formula about a frame structural storey shearing force distribution is supported for further designs and studies.
The provisions about the distribution of seismic shearing force of frame shear wall structures in《Code for seismic design of buildings》and《Technical specification for concrete structures of tall building》in our country are based on domestic and foreign design experience,however the lateral stiffness ratio of frame and shear wall are not including in their consideration. For solving this problem, this paper states that the seismic response on several buildings, which have 8-frame-sheared wall structure,with stiffness characteristic values arranging from 1.0 to 4.5,by the application of static elastic-plastic analysis method(Pushover)and dynamic time-history method. This study summarizes that different stiffness value of storey shearing force is distributed on frame-shear wall structure under different frequency of earthquake. The influence of shear wall stiffness degradation on the distribution of storey shearing force is also mentioned in this article. The formula about a frame structural storey shearing force distribution is supported for further designs and studies.
引文
[1]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[2]JGJ3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
[3]包世华.高层建筑结构设计和计算[M].北京:清华大学出版社,2005:75-96.
[4]刘建新.高层框-剪结构中框架地震内力的确定[J].建筑结构学报,1999,20(3):15-22.
[5]钟华,易伟建,袁贤讯.钢筋混凝土框架-剪力墙结构中框架的地震层剪力[J].建筑结构,2004,4(1):53-55.
[2]JGJ3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
[3]包世华.高层建筑结构设计和计算[M].北京:清华大学出版社,2005:75-96.
[4]刘建新.高层框-剪结构中框架地震内力的确定[J].建筑结构学报,1999,20(3):15-22.
[5]钟华,易伟建,袁贤讯.钢筋混凝土框架-剪力墙结构中框架的地震层剪力[J].建筑结构,2004,4(1):53-55.
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