Seismic Behavior of Composite Moment Resisting Frame Systems

本课题研究了型钢混凝土柱与钢梁组合抗弯框架体系在中高地震危险区的适用性。组合抗弯框架体系的抗震设计思想是基于开发一种理想的梁-侧移机制，其中延性钢梁的弯曲铰在整个建筑中发展，而铰在一层柱-基础界面处发展。研究任务包括：(A)组合钢骨混凝土柱和梁柱节点区域在地震荷载作用下提供高效耗能和变形能力的试验部件试验，以评估各种加固细节。(B)为评估各种配筋细节以确保关键的一层型钢混凝土柱-混凝土基础界面有足够的强度和变形能力，以及(C)使用著名的非线性分析程序IDARC进行分析研究，以模拟反应行为，将通过有和没有楼板相互作用的头部剪力钉来研究连续钢梁的反应行为。将进行参数研究，以确定组合子组件中的重要滞回特性，并扩展到评估完整的组合抗弯框架体系在地震激励下的反应性能。研究结果对制定地震作用下组合抗弯框架体系的设计准则和加固细节要求具有一定的适用性。评估结果对中高地震危险区组合型钢混凝土柱和钢梁组合抗弯框架结构体系设计准则和加固细则要求的适用性。

This research project studies the applicability of composite moment resisting frame systems made of composite Steel Reinforced Concrete (SRC) columns and steel beams for zones of moderate-to-high seismic risk. The seismic design philosophy for composite moment resisting frame systems is based on developing a desirable beam-sidesway mechanism, where ductile steel beam flexural hinging develops throughout the building and hinging develops at the first story column-foundation interfaces. The research tasks include: (a) experimental subassemblage testing to evaluate various reinforcing details for composite SRC columns and beam-column joint regions that provide efficient energy dissipation capacity and deformation capability during seismic loading scenarios. The response behavior of the subassemblages will be investigated for continuous steel beams through the joint with and without floor slab interaction by headed shear studs (b) experimental subassemblage testing to evaluate various reinforcing details to ensure sufficient strength and deformation capability at the critical first story SRC column-concrete foundation interface, and (c) analytical studies using the well-established nonlinear analysis program IDARC to model the response behavior using data from previous subassemblage testing and this research study. Parametric studies will be performed to identify important hysteretic properties in the composite subassemblages and expanded to evaluate the response behavior of complete composite moment resisting frame systems during earthquake excitations. The applicability of the results to develop design guidelines and reinforcing detail requirements for composite moment resisting frame systems during earthquake excitations. The applicability of the results to develop design guidelines and reinforcing detail requirements for composite moment resisting frame structural systems made of composite SRC columns and steel beams for zones of moderate-to-high seismic risk will be evaluated.