摘要
A steel tower topping an RC building comprises a non-proportional damping structural sys- tem with different damping ratios. To compare the results from the non-proportional damping model and the equivalent damping model.the structural system was calculated with the two damping mod- els during earthquake respectively, using earthquake time history analysis computer program devel- oped by the authors. Differences in the calculated results of inner forces and displacements using the two damping models were observed. It is found that if the equivalent damping model is used in design, the consequence will be unsafe for the steel tower and too safe for the RC building at the same time.
A steel tower topping an RC building comprises a non-proportional damping structural system with different damping ratios. To compare the results from the non-proportional damping model and the equivalent damping model ,the structural system was calculated with the two damping models during earthquake respectively, using earthquake time history analysis computer program developed by the authors. Differences in the calculated results of inner forces and displacements using the two damping models were observed. It is found that if the equivalent damping model is used in design, the consequence will be unsafe for the steel tower and too safe for the RC building at the same time.
关键词
地震
铁塔
建筑物
震动衰减率
积分算法
non-proportional damping
equivalent damping ratio
dynamic time history analysis
