框架_密肋复合墙结构剪力分担率计算方法研究 (1).pdfVIP

第 28 卷第 2 期 Vol.28 No.2 工 程 力 学 2011 年 2 月 Feb. 2011 ENGINEERING MECHANICS 141 文章编号：1000-4750(2011)02-0141-06 框架-密肋复合墙结构剪力分担率计算方法研究 *郭 猛，姚谦峰，袁 泉 (北京交通大学土木建筑工程学院，北京 100044) 摘 要：密肋复合墙体具有独特的结构构造形式，其刚度可按不同抗震设防要求进行调整，并可满足复杂建筑形 式的要求。该文以框架-剪力墙结构为依据，对框架-密肋复合墙结构协同工作机制及剪力分担率计算方法进行较 为系统的研究。基于 Timoshenko 梁基本理论，将框架-密肋复合墙结构视为由剪切型悬臂框架、弯剪型悬臂梁组 成的双重抗侧力体系，采用连续化方法建立框架-密肋复合墙结构的位移微分方程，推导出了计入复合墙剪切变形 的水平位移解析表达式和内力计算公式。根据前期试验获得的墙体模型低周反复荷载试验数据，拟合得出密肋复 合墙体指数式刚度退化模型，量化了墙体在各变形阶段的刚度退化系数。在此基础上提出不同变形阶段框架-密肋 复合墙结构剪力分担率的实用计算方法，并通过算例验证了复合墙刚度退化对结构内力分配的影响程度。 关键词：框架-密肋复合墙结构；位移微分方程；剪切变形；弯曲变形；刚度退化；剪力分担率 中图分类号：TU375 文献标识码：A CALCULATION METHOD FOR THE SHEAR-SHARING RATIO OF FRAME-COMPOSITE WALL STRUCTURE * GUO Meng , YAO Qian-feng , YUAN Quan (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China) Abstract: The multi-grid composite wall has unique structural types, and its stiffness can be adjusted according to different anti-seismic requests and complex architectural styles. In the context of the frame-shear wall structure, the cooperative work mechanism and shear-sharing ratio calculation method of frame-composite wall structures are studied systematically in this paper. Based on the fundamental theory of Timoshenko beam, the frame-composite wall structure is treated as double anti-seismic system consisting of shear type frames and shear-flexural type beams. The fundamental differential equation is established by the continuous approach, and its analytical solution of displacement and internal force are derived. Based on typical