1.College of Civil Engineering, Hefei University of Technology, Hefei 230009, China; 2.School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; 3.Anhui Key Laboratory of Civil Engineering Structures and Materials, Hefei 230009, China; 4.China Beijing Institute of Architectural Design, Beijing 100044, China
Abstract:Energy dissipation connections are introduced between the precast concrete (PC) frame structure and cladding panels, thereby forming the energy dissipation cladding panel (EDCP). The experimental investigations on dynamic responses and damping effect of the PC frame structure with EDCPs are lacking. Hence, a six-story, three-span planar frame structure with EDCPs (named “damping structure”) and a counterpart planar bare frame structure (named “seismic structure”) were designed. Then the middle span, bottom two stories of the frame was chosen as the test substructure, while the rest of structure was regarded as the numerical substructure. Hybrid tests on the damping and seismic structures were conducted, the damage modes and dynamic responses of the seismic and damping structures were analyzed. The damping effect and seismic performance of damping structure were clarified, as well as the collaborative mechanism of vibration reduction was revealed. The results indicated that damage evolution mode of the two structures were basically the same, with plastic hinges appearing successively at the ends of beams and the roots of columns, therefore the EDCP did not change the damage evolution mode of the main structure. No cracks were observed on the cladding panels and joints between the EDCP and main structure, and the structural inter-story displacement can effectively be transferred to USD through EDCPs. The maximum inter-story drift ratio of the damping structure was reduced by 12.59%, 17.68% and 10.34% under design-based earthquake, maximum considered earthquake and very rare earthquakes respectively, showing a satisfactory damping effect.
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