Abstract：A hybrid RCS frame structure with replaceable components, consisting of energy dissipation frame and main frame, is proposed in this work.Through the damages of replaceable components to concentrate the seismic energy dissipation, the functions of structures after earthquake can be rapidly recovered by replacing the damaged replaceable components.By using SAP2000, the nonlinear static analyses on 14 frame structures were carried out, and the mechanical behaviors of RCS hybrid frames were compared, so as to clarify the yield mechanism and the stress states of the RCS hybrid frames.The influences of the destruction modes, section types and positions of replaceable beam and the spans and positions of energy-dissipation frame on the mechanical behavior of RCS hybrid frame were analyzed.Based on the analysis results of mechanical behavior, five performance levels of RCS hybrid frame are proposed, towards the purposes of normal use, replaceable energy-dissipation members, repairable main frame, life safety and collapse prevention, respectively.Additionally, the elastic stiffness ratio KDF/KMF and the yield displacement ratio Δ2/Δ1 are used as control parameters for the elastic design of RCS hybrid frame.By using SAP2000, the dynamic time-history analyses and nonlinear static analyses on 8 RCS hybrid frames were carried out.Limit values of inter-story drifts satisfying different performance levels and the ranges of control parameters for elastic design of RCS hybrid frame were proposed.Towards different performance objectives of the frame structure, the dual-parameter seismic design method of RCS hybrid frame was proposed.The research results indicate that the RCS hybrid frame has good yield mechanism; shear-type replaceable beam has good energy-dissipation ability; replaceable beam with user-defined section is beneficial to recovering the functions of structure after earthquake.The stiffness and bearing capacity of the structure can be improved by arranging floor-to-floor replaceable beams and increasing the span of energy-dissipation frames.When KDF/KMF is in the range of 2.8 to 4.3 and Δ2/Δ1 is greater than 1.8, the structure can achieve the expected stress state with good replaceability, and the dual-parameter seismic design method shall be effective.
门进杰 霍文武 兰涛 雷梦珂 史庆轩. 带可更换构件的RCS混合框架结构受力#br#
特性及抗震设计方法[J]. 土木工程学报, 2020, 53(6): 42-52.
Men Jinjie Huo Wenwu Lan Tao Lei Mengke Shi Qingxuan. Mechanical behavior and seismic design method of RCS hybrid frame#br#
structure with replaceable components. 土木工程学报, 2020, 53(6): 42-52.
