Seismic Behavior of Steel Moment-Resisting Frames with Composite Reinforced Concrete Infill Walls

摘要本文采用为期三年的试验和分析研究方法，研究了复合钢筋混凝土（RC）填充墙钢抗弯矩框架在地震作用下的设计和性能。该方案包括一系列的两个两层，一个海湾框架实验，循环剪切连接器实验，和一个全面的分析工作。在钢框架-钢筋混凝土填充体系中，钢梁和钢柱作为边界构件抵抗地震倾覆荷载和轴力，钢筋混凝土填充作为腹板抵抗剪力。为确定钢框架-钢筋混凝土填充复合墙体体系的抗震性能，将进行三分之一比例尺、两层、一孔框架的模拟地震荷载试验。将确定钢框架和RC填充物提供给系统的强度和刚度的比例。完全约束（力矩）梁-柱连接部分约束将进行测试。此外，还将进行连接器试件的循环剪切试验，量化抗剪螺柱在循环剪切和轴向拉伸作用下的强度。数据分析与线性和非线性分析相结合的钢框架-钢筋混凝土填充子组合将有助于建立分析和设计建议。框架试验的实验观察结果，加上迄今为止在类似系统上进行的所有现有实验数据，这些数据主要包括RC填充物（例如，有效压缩支柱或膜单元）的简单计算模型的几何、拓扑和本构特性。本项目由国家科学基金（NSF-94-154）“复合材料和混合结构”研究计划第二年资助。

A three-year experimental and analytical research program is undertaken to study the design and behavior of steel moment-resisting frames with composites reinforced concrete (RC) infill walls subjected to seismic excitations. The program includes a series of two two-story, one-bay frame experiments, cyclic shear connector experiments, and a comprehensive analytical effort. In the steel frame-RC infill system, the steel beams and columns act as boundary members resisting gavotte loads and axial forces from seismic overturning, while the RC infills serve as webs resisting shear. Simulated seismic load testing of one-third scale, two-story, one-bay frames will be conducted to determine the seismic behavior of steel frame-RC infill composite wall systems. The proportions of strength and stiffness provided to the system by the steel frame and the RC infills will be determined. Fully-restrained (moment) beam-to-column connections partially-restrained will be tested. In addition, cyclic shear tests of connector specimens to quantify the strength of shear studs under cyclic shear and axial tension will also be tested. Data analysis coupled with linear and nonlinear analysis of steel frame-RC infill subassemblages will serve to establish analysis and design recommendations. Experimental observations from the frame tests, coupled with all existing experimental data on similar systems conducted to date which consist mainly of geometry, topology, and constitutive properties of simple computational models for the RC infills (e.g., effective compression struts or membrane elements). This is a project supported under the second year program of research initiative `Composite and Hybrid Structures`, NSF-94-154.