“…However, it can be concluded from the tests on the module-to-module connection in Table 1 that the intra-module beam-to-column connection have a significant influence on the seismic performance of the module-to-module connections, thereby affecting the overall seismic performance of MSC. Zhang et al [ 113 , 114 ] studied the seismic performance of the column-to-corner fitting connection in MSC using cyclic tests and finite element analysis, as shown in Fig. 10 (a).…”
Section: Recent Innovations On the Connectionsmentioning
“…However, it can be concluded from the tests on the module-to-module connection in Table 1 that the intra-module beam-to-column connection have a significant influence on the seismic performance of the module-to-module connections, thereby affecting the overall seismic performance of MSC. Zhang et al [ 113 , 114 ] studied the seismic performance of the column-to-corner fitting connection in MSC using cyclic tests and finite element analysis, as shown in Fig. 10 (a).…”
Section: Recent Innovations On the Connectionsmentioning
“…Compared to the cold-formed steel buildings, ATLS modular houses have advantages of construction efficiency and removable performance [ 12 – 14 ]. In contrast to traditional modular structure buildings, the frame and enclosure of the ATLS modular house can be utilized repeatedly [ 15 ]. Fig.…”
The assembled -type light steel (ATLS) modular house is an emerging type of eco-friendly modular building and has been widely used for buildings with repetitive units. This paper focused on the bending stiffness of the bottom frame of ATLS modular house. The bending stiffness of the full-scale ATLS modular house was tested. It was indicated that the stiffness of the cold-formed thin-walled beam of the bottom floor was weak and the vertical deformation of the beam was obvious. Furthermore, the finite-element (FE) model was developed based on the general purpose finite-element software ABAQUS. The results of the FE model were consistent approximately with the test results in terms of the load–displacement curves at the mid-span of the bottom frame beam, and center of the bottom floor. Based on the verified FE model, the influence of the calcium silicate board, opening of corner fitting, stiffness of bolt connection, and the constraint of corner fitting on the bending stiffness of the bottom frame beam was revealed. The opening of the corner fitting has little effect on the bending stiffness of the floor. The existence of the calcium silicate board can increase the bending stiffness of the floor by 23%. The increase of stiffness of the high-strength bolt connection has less influence on the bending stiffness of the floor. The bending stiffness of the floor decreases by 14.7% when constraining the inside edge of the corner fitting compared to other boundary conditions. The presented experimental and numerical studies will be useful to promote the design of ATLS modular house.
“…The structural strength and stability of cold-formed steel lipped channel beam columns under biaxial moments and axial forces were experimentally investigated by Torabian et al [13]. Zhang et al [14] conducted the vertical bearing capacity test of the prefabricated box houses, and the calculation method for the initial rotation stiffness was obtained. Then Zhang et al [15] carried out the test on the full-scale models of prefabricated box houses under longitudinal horizontal load.…”
In recent years, cold-formed steel has been widely used in prefabricated steel structures, and the common cross-section forms are mainly complex lipped angle sections. However, there is a lack of design guidance for such a cross-section due to the complex geometric property. The restraint between adjacent plates cannot be considered proper for the traditional analytical method. Therefore, it is particularly important to study the stability bearing capacity of angle sections with complex edges under axial compression. In this paper, the finite strip software (CUFSM5) was used to analyze the critical stress of 1296 different angle sections under axial compression. The deformation diagram and the critical stress of elastic buckling were obtained. Considering the restraint between adjacent plates, the formula for predicting the critical stress of elastic local buckling of complex lipped angle sections was proposed and verified. Further, the critical stress of elastic distortional buckling of 918 complex lipped angle sections was analyzed by CUFSM. It was found that the cross-sections can be divided into two categories: cross-section without distortional point and cross-section with distortional point. It was found that the critical stress of elastic local buckling of the angle steel section can be significantly improved by the complex edge. Additionally, the critical stress of elastic local buckling of the section is less affected by the edge size for the complex edge section. The accuracy of the Hancock method for calculating the critical stress of elastic distortional buckling of complex lipped angle sections with distortional points was verified. The presented research can provide useful guidelines for designing cold-formed steel angle columns.
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