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种经济的替代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体/核心、钢框架和框架-核心连接的足够性能。与复合壁/芯循环性能相关的基本问题尚未得到解决。制定了一项结合实验和分析研究的协调研究计划，以研究复合墙体-混合体系的性能。该项目的主要目标是：(1)进行并记录复合墙体的实验研究，(2)研究循环拉伸和压缩下混凝土和包围钢截面之间的力传递机制，(3)评估关于墙体强度、刚度和延性的实验结果，(4)评估现有的规范要求，(5)提供必要的数据，以便对完整的建筑系统进行分析研究，以评估使用混合/复合系统的经济性。将测试5个约1/3比例的复合墙和约10个大型隔离边界柱。一个原型结构将用于推导测试样本的一般参数，并将实验数据与整体结构响应联系起来。此外，将进行隔离边界柱的循环荷载试验，以提供有关力传递机制和约束要求的详细数据。将对试件行为进行一般分析研究，以评估简化代码方程预测复合墙强度和刚度的能力。建模技术适用于完整的结构系统的分析研究也将进行调查。这是“复合材料和混合结构”的第二年倡议（NSF 94-154）下的一个奖项。

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.`