Experimental and Analytical Investigation of Hybrid/ Composite Structural Walls - Steel Frame Systems

使用钢筋混凝土或复合核心墙和钢重力或力矩框架提供了一个经济的替代RC墙/核心和混凝土框架系统。这些系统的成功性能取决于墙/核心、钢框架和框架-核心连接的足够性能。 与复合墙/芯的循环性能相关的基本问题尚未得到解决。 一个协调的研究计划，结合实验和分析研究，制定调查复合墙混合系统的性能。 该项目的主要目标是：（1）进行并记录组合墙的实验研究，（2）研究在循环拉伸和压缩下混凝土和外包钢截面之间的力传递机制，（3）评估关于墙强度、刚度和延性的实验结果，（4）评估现有的规范要求和（5）提供必要的数据，以便可以分析地研究完整的建筑系统，以评估使用混合/复合系统的经济性。 将测试五个约1/3比例的组合墙和约十个大型隔离边界柱。 原型结构将被用来推导出测试样本的一般参数，并将实验数据与整体结构响应相关联。 此外，还将对隔离边界柱进行循环荷载试验，以提供有关力传递机制和约束要求的详细数据。 将对试件性能进行一般分析研究，以评估简化规范方程预测组合墙强度和刚度的能力。 也将研究适用于完整结构系统分析研究的建模技术。 这是一个奖项下的第二年倡议（NSF 94-154）的“复合材料和混合结构。

The use of reinforced concrete or composite core walls and steel gravity or moment frames offers an economical alternative to RC wall/core and concrete frame systems. Successful performance of these systems depends on the adequate performance of walls/cores, steel frames, and frame-core connections. Fundamental issues related to cyclic performance of composite walls/cores have yet to be addressed. A coordinated research program, combining experimental and analytical studies is formulated to investigate the performance of composite wall - hybrid systems. The primary objectives of this project are to: (1) conduct and document experimental studies of composite walls, (2) investigate force transfer mechanisms between concrete and encased steel sections under cyclic tension and compression, (3) evaluate the experimental results with respect to wall strength stiffness, and ductility, (4) assess existing code requirements and (5) provide essential data so that complete building systems can be investigated analytically to assess the economics of using hybrid/composite systems. Five approximately 1/3-scale composite walls and approximately ten, large-scale isolated boundary columns will be tested. A prototype structure will be used to derive general parameters of the test specimens and to relate experimental data to overall structural response. In addition, cyclic load tests of isolated boundary columns will be done to provide detailed data on force transfer mechanisms and confinement requirements. General analytical studies of specimen behavior will be performed to evaluate the ability of simplified code equations to predict the strength and stiffness of the composite walls. Modeling techniques appropriate for analytical studies of complete structural systems will also be investigated. This is an award under the 2nd year Initiative (NSF 94-154) on `Composite and Hybrid Structures.`