Modeling Inelastic Response of Reinforced Concrete Columns and Steel (RCS) Connections For Use in Performance-Based Evaluation of RCS Frame Structures

由钢筋混凝土柱和钢梁组成的RCS结构是地震区的一种经济有效的建筑类型。根据试验结果，RCS节点的模型被限制为强度模型或单调力-变形模型。在框架结构中通常遇到的节点的行为，例如与强外板和T形配置的连接，并不为人所知。具有强外板的节点的非弹性性能与具有强内板的节点的非弹性性能有很大不同。支座失效可能是T型接头的一个威胁，因为连接上方缺少柱截面。将根据新的和现有的实验和分析结果，开发用于基于性能设计的RCS连接在剪切和承载方面的行为的宏模型。这些模型将包括约束的影响，混凝土软化，相对强度贡献的抗剪机制上的RCS节点的滞回响应。

RCS structures consisting of reinforced concrete columns and steel beams are a cost-effective type of construction in seismic zones. Models for RCS joints have been restricted to either strength models or monotonic force-deformation models based on experimental results. The behavior of joints typically encountered in frame structures, such as connections with strong outer panels and T-configurations, is not well known. Inelastic behavior of connections with strong outer panels could significantly differ from that of joints with strong inner panel. Bearing failures might represent a threat in T-joints because of the lack of a column section above the connection. Macro models that simulate the behavior of RCS connections in shear and bearing for performance-based design will be developed based on new and existing experimental and analytical results. These models will include the effect of confinement, concrete softening, and relative strength contribution from shear resistance mechanisms on hysteretic response of RCS joints.