RC/Composite Wall - Steel Frame Hybrid Buildings:Connectionsand System

由钢筋混凝土墙/核心和混凝土重力框架组成的结构系统是高地震风险地区中等高度建筑的一种非常常见的结构系统。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。有限的研究已经进行了审查之间的承载力传递机制钢和混凝土。然而，有关的循环性能的组合墙/核心（那些与钢边界柱）和框架核心连接的基本问题尚未得到解决。将进行一个综合的实验和分析程序，以调查系统的性能与墙壁/核心（传统的加强或与钢边界元素）和钢重力或力矩框架。 该项目的主要目标是：（1）进行钢梁/楼板系统与核心连接的实验研究，（2）开发用于这种连接的分析建模技术，（3）将这些模型结合到广泛使用的非弹性结构分析计算机程序中，（4）提供研究分析完整的建筑系统以评估使用混合/复合系统的经济性的工具，（5）制定设计指南。该研究将围绕一个原型结构，这将被用来获得测试样本，并与实验数据的整体结构响应。本文对七根1/3比例的钢-墙边界柱进行了试验研究（可以是小的或较大的安装柱），（2）连接区域周围的横向钢筋数量，（3）复合金属桥面板对连接件刚度和强度的贡献，特别是“仅剪切”连接件，（4）梁轴向荷载（由于复合金属桥面板隔板作用而产生的拉伸或压缩）对剪力和弯矩连接性能的影响。将对试样行为进行一般分析研究，以评估简化规范方程预测子组件强度的能力。还将使用根据平衡和兼容性要求建立的简化力学模型和有限元模型进行详细的分析研究。这些研究将有助于了解观察到的标本行为，以及研究在研究的实验阶段没有考虑的其他标本配置。 将制定连接设计的具体建议。

Structural systems consisting of reinforced concrete walls/cores and concrete gravity frames are a very common structural system for moderate rise construction in regions of high seismic risk. Use of reinforced concrete or composite core walls and a steel gravity or moment frame offers an economical alternative to RC wall/core and concrete frame systems. Limited studies have been conducted to examine bearing force transfer mechanism between steel and concrete. However, fundamental issues related to cyclic performance of composite walls/cores (those with steel boundary columns) and frame-core connections are yet to be addressed. An integrated experimental and analytical program will be carried out to investigate the performance of systems with walls/cores (conventionally reinforced or with steel boundary elements) and steel gravity or moment frames. The primary objectives of this project are to: (1) conduct experimental studies of steel beam/floor system-to-core connections, (2) develop analytical modeling techniques for such connections, (3) incorporate these models into widely used inelastic structural analysis computer programs, (4) provide tools to investigate analytically complete building systems to assess the economics of using hybrid/composite systems, and (5) develop design guidelines. The research will revolve around a prototype structure which will be used to derive the test specimens, and to relate experimental data to overall structural response. The proposed research involves experimental testing of seven 1/3 -scale wall-to steel boundary columns (which may be a small erection column or a larger one), (2) amount of transverse reinforcement around the connection region, (3) contribution of composite metal decks to the stiffness and strength of the connections, particularly `shear-only` connections, and (4) the influence of beam axial load (tension or compression due to composite metal deck diaphragm action) on the performance of shear and moment connections. General analytical studies of specimen behavior will be conducted to evaluate the ability of simplified code equations to predict the strength of the subassemblages. Detailed analytical studies will also be conducted by using simplified mechanical models constructed based on equilibrium and compatibility requirements, and finite element models. These studies will assist in understanding observed specimen behavior, as well as to study additional specimen configurations not considered in the experimental phase of the research. Specific recommendations for connection design will be developed.