Static and dynamic analysis of collapse behaviour of steel structures

Abstract

With the progress of structural engineering and technology, architects have desired to implement more complicated and flexible design, especially for large span structures and high-rise buildings. In these structures, it is almost impossible to ensure safety by the experiments with their actual size models. The structural analysis should be performed to check the safety. Furthermore, to confirm the true safety, not only linear elastic behavior but also nonlinear behavior of a structure is required to be carefully pursued until its collapse. Analytic solutions in explicit form based on the theory of structural mechanics have the advantage that they can figure out the action of a structure in both quality and quantity. However, the behavior of real complicated buildings with nonlinear characteristics still cannot be expressed in explicit form. Therefore, numerical analysis using computers becomes effective and critically important. This paper presents the computer program to pursue nonlinear behavior of steel structures until collapse state statically and dynamically, and it shows two results of example analyses. The program presented in this paper is specially designed to use the vector-processing function of super computer quite effectively. ETA10 (1.2 GFLOPS/8 CPU, 2 GB /8 CPU) and CRAY2 (1.9GFLOPS/4CPU, 2GB/4CPU) are used in Examples 1 and 2, respectively.