Experimental Investigation of the Strength Stiffness and Deformaton Capacity of Slender Reinforced Concrete Walls

细长钢筋混凝土墙强度刚度及变形能力试验研究

• 批准号: 8912992
• 负责人: Sharon Wood
• 金额: $ 19.48万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-15 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912992&HistoricalAwards=false
• 关键词: Experimental; Investigation; Strength; Stiffness; Deformaton

During the past 20 years, the satisfactory behavior of many reinforced concrete buildings during damaging earthquakes has been attributed to the presence of structural walls. Structural walls provide stiffness to the building systems, and control the drift and damage in the buildings. A critical concern for the design of structural walls in seismic regions has been the specification of reinforcement details to insure ductile response. The performance of buildings in Vina del Mar during the March 1985 Chilean earthquake appears to contradict professional opinion, because the buildings performed well and the reinforcement details were essentially nonexistent. This research project develops methods for determining the strength, effective stiffness, and deformation capacity of reinforced concrete walls. Walls are used as the primary lateral-load resisting system in many reinforced concrete structures, yet many fundamental concepts have not been verified experimentally. The experimental phase of the project involves lateral load tests of reinforced concrete walls. Major variables include the geometry of the cross section, amount of web reinforcement, type of loading, and amount of confinement reinforcement. Walls subjected to static load reversals and dynamic loading. The analytical phase of the project uses the observed response and the measured response of the experiments to develop a hysteresis model suitable for reproducing nonlinear response in shear and flexure. Methods are developed to determine the strength, likely mode of failure, and effective stiffness of structural walls during the design process.

在过去的20年里， 许多钢筋混凝土的性能 在破坏性地震中， 被认为是结构性的 墙 结构墙提供刚度， 建筑系统，并控制漂移 和建筑物的损坏。 一个关键 关注结构墙的设计， 地震区一直是规范 钢筋详图，以确保延性 反应 建筑物的性能 维纳德尔马在1985年3月智利 地震似乎违背了专业 因为建筑物表现良好， 加固的细节是 根本不存在 该研究项目开发了 确定强度，有效 刚度和变形能力 钢筋混凝土墙 墙被用作 主抗侧力体系 许多钢筋混凝土结构，但许多 基本概念尚未得到验证 实验性的 项目的试验阶段 包括加固的横向载荷测试 混凝土墙 主要变量包括 横截面的几何形状、腹板的数量 钢筋、荷载类型和数量 约束加固 墙受到 静态负载反转和动态负载。 项目的分析阶段使用 观测响应和测量响应 实验的结果是， 适用于再现非线性的模型 剪切和弯曲响应。 方法 用来确定 失效模式和有效刚度 在设计过程中的结构墙。