Composite Interaction of Steel Frame Members and Reinforced Concrete Walls Under Seismic Loading

地震荷载下钢框架构件与钢筋混凝土墙的复合相互作用

• 批准号: 9810005
• 负责人: Jerome Hajjar
• 金额: $ 11.49万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9810005&HistoricalAwards=false
• 关键词: Composite; Interaction; Steel; Frame; Members

9810005 Hajjar This project presents a combined computational/experimental effort focusing on the seismic behavior of the interface between concrete walls and steel frame members in composite wall structural building systems. The work targets the development of comprehensive, nonlinear, static and dynamic analysis procedures for modeling composite wall building structures, including the behavior of the steel/concrete interface; and achieving a more through understanding of the composite cyclic interaction between RC walls and steel framing. Composite structural wall systems provide excellent strength and stiffness to withstand both service level drift and ultimate forces from seismic events. The objectives of the research include the development of a finite element formulation for the seismic analysis of composite reinforced concrete walls with surrounding steel framing, the quantification through experimental testing of the combined cyclic shear and tensil strength of headed hear studs and deformed bar anchors embedded in concrete panels, and the verification and calibration of the shear and axil strength interaction relations under monotonic and cyclic loading for connectors used in practice used in practice. A three-dimensional, nonlinear finite element to model to simulate the cyclic interaction at the steel/concrete wall interface will be formulates. A series of experiments will be designed to document the cyclic interaction along the interface between RC walls and surrounding steel framing. The analyses will feature a geometrically and materially nonlinear finite element formulation, using a new fiber-based finite element for the shear connectors and appropriate continuum elements for the concrete in the interface region, align with stress-space plasticity formulations for both the concrete and steel. The ultimate goals is the development of clear guidelines for: 1) incorporating the steel-concrete interface behavior in both linear and nonlinea r analyses of composite wall systems; and 2) detailing the steel frame-concrete panel connection to achieve desirable performance goals. This project is supported under the fourth year competition of NSF 94-154. ***

9810005 Hajjar 该项目提出了一项综合计算/实验工作，重点关注复合墙结构建筑系统中混凝土墙和钢框架构件之间界面的地震行为。 这项工作的目标是开发用于模拟复合墙体建筑结构的综合、非线性、静态和动态分析程序，包括钢/混凝土界面的行为；并通过了解 RC 墙和钢框架之间的复合循环相互作用来实现更多目标。复合结构墙系统提供出色的强度和刚度，可承受使用水平漂移和地震事件产生的极限力。 研究的目标包括开发一种有限元公式，用于对周围钢框架的复合钢筋混凝土墙进行抗震分析，通过实验测试对嵌入墙体中的带头螺柱和变形钢筋锚栓的组合循环剪切和拉伸强度进行量化。混凝土面板，以及实际使用的连接器在单调和循环载荷下的剪切和轴强度相互作用关系的验证和校准。 将制定三维非线性有限元模型来模拟钢/混凝土墙界面处的循环相互作用。 将设计一系列实验来记录沿钢筋混凝土墙与周围钢框架之间界面的循环相互作用。 分析将采用几何和材料非线性有限元公式，对剪力连接器使用新的基于纤维的有限元，对界面区域的混凝土使用适当的连续体单元，与混凝土和钢的应力空间塑性公式保持一致。 最终目标是制定明确的指导方针：1）将钢-混凝土界面行为纳入复合墙体系统的线性和非线性分析中； 2) 详细设计钢框架-混凝土板连接以实现理想的性能目标。 该项目得到了 NSF 94-154 第四年竞赛的支持。 ***