科研之友
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摘要
The self-weight of partially encased composite steel and lightweight aggregate concrete (PELC) columns is 15% lower than that of partially encased composite (PEC) columns, so PELC columns have a wide application in prefabricated buildings. To investigate the axial compressive behavior of PELC columns, finite element analysis models are built. For the verification of the finite element model by using the existing test data, the material properties of lightweight aggregate concrete and regular concrete, and the mechanical properties of PELC and PEC are compared. The results show that it is not safe to predict the bearing capacity of PELC columns with that of the PEC columns whose concrete strength is same. Then the stress and failure modes are analyzed.Also, this paper discussed the influence of strength of materials, slenderness ratio and steel ratio on the axial bearing capacity and deformation ability of PELC columns. In addition, the applicability of the existing procedures for calculating the axial compression capacity of long columns is verified. The research results can provide a reference for the theoretical research and design of PELC members. ? 2022, Progress in Steel Buiding Structures All right reserved.
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