A Study of Behavior and Design of Reinforced Concrete Shear Walls With Unsymmetrical Cross-Section

在钢筋混凝土抗震设计中 使用L形或T形剪力墙的结构， 经常使用异形壁。 横向 这些不对称“法兰”的载荷特性 “墙”是不好理解的。 没有 已经进行了实验研究， 不对称带翼缘墙 大于2的比率，并且没有 现有建议可为以下方面提供指导： 适当的分析或设计程序。 该项目涉及分析和 非对称翻边试验研究 剪力墙 详细的分析研究 将在两个剪力墙主导 旧金山弗朗西斯科湾区的建筑物， 记录的仪表化响应数据 1989年洛马普列塔地震及其影响 余震 分析研究包括 旨在研究建模技术 横向载荷响应， 测量和计算的响应。 的 实验研究将涉及设计， 四个样本的构建和测试 具有不同的凸缘宽度和加强 比率。 样本将接受 反向循环横向载荷和恒定 轴向应力以研究刚度， 强度和变形特性 墙壁 详细的分析研究， 非线性有限元技术将是 用于评估现有的分析模型 并开发新的分析模型。 综合分析和 实验研究将建立 分析建模指南， 比例，以及不对称的细节 地震用翼缘剪力墙 阻力

In seismic design of reinforced concrete structures using shear walls L-shaped or T- shaped walls are often used. The lateral load behavior of these unsymmetrical "flanged walls" is not well understood. No experimental studies have been conducted on unsymmetrical flanged walls with aspect ratios greater than two, and no recommendations exist to provide guidance on appropriate analysis or design procedures. This project involves both analytical and experimental studies of unsymmetrical flanged shear walls. Detailed analytical studies will be conducted on two shear wall dominant buildings in the San Francisco Bay Area with instrumented response data recorded from the 1989 Loma Prieta earthquake and its aftershocks. The analytical studies are designed to investigate modeling techniques for lateral load response by comparing measured and computed responses. The experimental studies will involve the design, construction, and testing of four specimens with different flanged widths and reinforcing ratios. The specimens will be subjected to reversed cyclic lateral loading and constant axial stress to investigate stiffness, strength, and deformation characteristics of the walls. Detailed analytical studies using nonlinear finite element techniques will be used to evaluate existing analytical models and to develop new analytical models. The objectives of the combined analytical and experimental studies will be to establish guidelines for analytical modeling, proportioning, and detailing of unsymmetrical flanged shear walls for earthquake resistance.