Controls on material and mesh for structural nonlinear time-history Analysis

摘要

In order to improve the solution of nonlinear time-history analysis for high-rise buildings, the concrete constitutive relation of Chinese code has been modified by using Najar damage theory, and based on the limitation of stable time increment in explicit dynamic analysis, a simplified Rayleigh damping form with tiny stiffness proportional damping is proposed to decrease the damage induced by those high frequencies, at last, the influence of mesh size on stress and damage is also discussed. The numerical results show that these principles are workable for more accurate results.