| In recent years, with the emergence and development of cold-formed thin-wall steel dwelling houses, integrated fabricated thin-walled light steel structure system has been widely used. For this kind of structure system, the whole stability performance is directly related to the stability of its components and connecting nodes. Element sections are liable to local and appear higher buckling strength for the larger width-to-thickness ratio of plates. So the stability of thus components including static and dynamic performance is different from common steel members. This paper, based on the theory of energy consumption, clarifies the effects of energy-dissipation modes between plastic development and the local buckling deformation on the stability performance of thin-walled rectangular steel components, and summarizes the restoring force model of such components. That offers the important guiding significance to the actual application of the project.The main contents of this paper are divided into four parts.The first part is the finite element theory and validated numerical model. It valued the validity and applicability for the numerical model by the comparation between the experimental results and finite element numerical modeling results.The second part analyses the stability performance of short columns including static stability and dynamic stability performance.In this part, influence of some parameters like material property(yield strength, strength-yield ratio), geometry parameters (high-to-width ratio, slenderness ratio), load parameters (axial pressure) on the buckling failure modes and energy-dissipation mechanism has been evaluated. The third part focuses on the stability performance of long columns. Based on the previous two parts, the fourth part summarize three different failure modes of inductive components, and put forward the restoring force model of cold-formed thin-wall rectangular section components. |
PDF Full Text Request