框架-剪力墻結構的框架地震層剪力分配
林斯嘉
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林斯嘉(華南理工大學建筑設計研究院，廣州510640)[摘要] 我國《建筑抗震設計規(guī)范》和《高層建筑混凝土結構技術規(guī)程》關于框架-剪力墻結構地震層剪力分配的規(guī)定是依據(jù)設計經(jīng)驗提出來的，并沒有考慮框架與剪力墻各自抗側剛度比值的影響，因而較為籠統(tǒng)，明顯欠缺合理性。連續(xù)化分析方法中框架．剪力墻結構的剛度特征值是表征框架-剪力墻受力和變形的重要指標。本文采用靜力彈塑性分析( Pushover)方法和動力彈塑性時程分析方法對剛度特征值為1.0~4.5的8棟框架-剪力墻結構做了全過程研究，得到了多遇、基本和罕遇地震作用下不同剛度特征值的框剪結構樓層剪力分配，以及罕遇地震下剪力墻剛度退化對樓層剪力分配的影響，并給出了框架層剪力分配公式供設計參考。[關鍵詞] 框架-剪力墻；層剪力分配；靜力彈塑性分析；動力時程分析中圖分類號：TU375.41 文獻標識碼：A 文章編號：1002-848X(2012) S2-0294-06Distribution of seismic shearing force in frame- shear wall structureLin Sijia( Architecture Design Research Institute, South China University of Technology, Guangzhou 510640, China)Abstract: 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 of our country is based on domestic and foreign design experience, no account of lateral stiffness ratio of frame and shear wall is considered, and therefore relatively general, obviously unreasonable. In order to solve this problem, this paper studied the seismic response of 8 frame shear wall structure buildings, with stiffness characteristic values arranging from l.0 t0 4.5,by the application of static elastic-plastic analysis( Pushover) method and dynamic time-lustory method. Distribution of storey shearing force of frame-shear wall structure buildings with different stiffness characteristic values under frequent earthquake, basic earthquake, as well as rare earthquake is obtained. The influence of shear wall stiffness degradation on the distribution of storey shearing force is also studied to summarize a frame structural storey shearing force distribution formula for design reference.Keywords: frame-shear wall structure; shearing force distribution; pushover analysis; dynamic time-historical analysis
