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        A Prefabricated Underground Cylindrical Garage and a Corresponding Stiffness Analysis

        Zhenbo Zhang,Pengfei Li,Zheng Li,Mingju Zhang,Haocheng Xiong 한국강구조학회 2020 International Journal of Steel Structures Vol.20 No.3

        This paper presents a design of a prefabricated structure for an underground cylindrical garage. The performance of this structure and the node connections in terms of lateral stiff ness is investigated, which is critical to the safety of the excavation process. Analytical solutions of the lateral stiff ness of the prefabricated structure are derived considering compatible displacement. A 3D model of the prefabricated structure is developed and used in the numerical simulation to verify the theoretical model. As the key factor of the lateral stiff ness of the prefabricated structure, the lateral stiff ness of the node is also obtained via laboratory testing. Three connection nodes are fabricated according to the design and are tested in the laboratory. The infl uence of the cross-sectional area of the connection beam and the thickness of the column base on the lateral stiff ness of the connection node is also investigated in the laboratory test.

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