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Steel frames and composite wall panels are usually connected by welding. In this paper, a flexible bolt connection method is designed, and the cross section of the original composite wall panel is optimized to form a new envelope structure system. The new envelope structure is analyzed as a whole using the finite element software ABAQUS. In order to compare the performance of the welding and the flexible bolt connections, an experimental study is carried out to investigate the bearing capacity and displacement of single bolt and two bolts flexible bolt connection and the welded connection. The seismic bearing capacity, ductility and energy consumption capacity of of the different envelope structures are analysed. The results of the theoretical analysis and experimental verification indicate that the flexible bolt connection is superior to the rigid welded connection in terms of bearing capacity, ductility, energy consumption and impact on the stiffness of the main structure. It is believed that such findings are of great value for further application of steel frame structure in practice.

The cantilever structure will produce a large dynamic response under the vertical load, which will cause the user’s discomfort. Therefore, the vibration characteristics of the structure caused by the vertical load are an important part of the comfort design of the cantilever structure in the normal use limit state. This article takes the vertical displacement of a cantilevered balcony slab on one side of a project under load as an example, and builds a model in the nonlinear finite element software to calculate the structural displacement and the factors of the cantilever length and the tensile reinforcement, and the corresponding comfort evaluation is carried out, which provides a reference for the vibration comfort evaluation of the house cantilever structure.