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结构在地震带是一种经济有效的建筑类型。基于试验结果的RCS节点模型一直局限于强度模型或单调力-变形模型。通常在框架结构中遇到的节点的行为，例如与坚固的外面板和t形结构的连接，尚不清楚。具有强外板连接的非弹性性能与具有强内板连接的非弹性性能显著不同。在t型接头中，由于在连接上方缺少柱段，轴承失效可能会构成威胁。将根据新的和现有的实验和分析结果，开发模拟RCS连接在剪切和承载下的行为的宏观模型，用于基于性能的设计。这些模型将包括约束、混凝土软化和抗剪机制对RCS节点滞回响应的相对强度贡献的影响。

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.