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This and the next image are FROM:
Ying Xu (1,2), Xiaoning Zhang (2) and Qinghua Han (1,2)
(1) Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin University, Tianjin, 300350, China
(2) School of Civil Engineering, Tianjin University, Tianjin, 300350, China
“Research on the progressive collapse resistance of single-layer cylindrical latticed shells with AH joints”, Thin-Walled Structures, Article 107178, Vol. 158, January 2021, https://doi.org/10.1016/j.tws.2020.107178
ABSTRACT: Progressive collapse accidents of single-layer latticed shells introduce a serious threat to public safety. The progressive collapse-resisting capacity (PCRC) has gradually become an essential requirement in the design of spatial structures. In this study, the progressive collapse test and numerical simulation of a single-layer cylindrical latticed shell were conducted to evaluate the effect of the joint stiffness on the PCRC of fabricated single-layer latticed shells. A combined spring model was established to simulate the semi-rigid performance of fabricated joints in the FEA. The failure mechanism of single-layer cylindrical latticed shells with different joint systems was thoroughly discussed from multiple perspectives. The results show that the combined spring model can accurately simulate the progressive collapse of a single-layer latticed shell with semi-rigid joints. The progressive collapse of the cylindrical latticed shell with type-II AH joints showed brittle features during the test. Most joints experienced connection failure. Although the rigid jointed shell and latticed shell with type-II AH joints have much higher PCRC, the semi-rigid jointed shell with type-I AH joints has better ductility during progressive collapse. This paper offers a reference for the progressive collapse-resisting design of latticed shells with fabricated joints.
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