摘要
文章采用不同阻尼模型对某实际框架结构地震反应运动方程进行求解,计算结构地震反应的层间位移、顶层最大位移、结构总输入能、阻尼耗能和滞回能等指标,并进行比较,结果如下:瞬时刚度阻尼模型使得结构层间位移和顶层最大位移取得最大值;相应地瞬时刚度阻尼模型使得结构阻尼耗能在各阻尼模型中取值最小,而滞回能取值最大;除振型阻尼使得总输入能较其他阻尼模型小得多外,其余模型使总输入能取值基本相同。研究表明:按不同阻尼模型计算得到的地震反应结果相差较大,对于何种阻尼计算方式最可靠,应进一步开展精确试验对比研究;用瞬时刚度阻尼模型进行地震反应分析偏于安全。
Several damping models are used to solve the seismic response motion equation of a RC frame structure.The inter-story displacement,top floor maximum displacement,total input energy,damping energy and hysteresis energy are calculated and compared.It is shown that instantaneous stiffness damping model can bring about the maximum inter-story displacement and maximum top floor displacement,and it also produces minimum damping energy and maximum hysteresis energy.The total input energy has no significant difference between the damping models except that the modal damping model gives much less total input energy.It is demonstrated that different damping models have different seismic response results,so more precise experimental studies are necessary to find out the most reliable model.The instantaneous stiffness model is relatively reliable in estimating structural seismic response.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第7期1027-1030,共4页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金重大研究计划资助项目(90715016)
安徽省自然科学基金资助项目(070415220)
关键词
阻尼模型
地震反应
位移
阻尼耗能
滞回能
damping model
seismic response
displacement
damping energy
hysteresis energy
