摘要
本文依据新颁布的《建筑抗震设计规范》(GB50011-2001),对随机地震动功率谱模型参数的取值进行了具体研究。提出了与新规范建筑场地类别及设计地震分组相对应的场地土阻尼比和卓越频率,非平稳模型中时间包络函数及地震动持时的取值。采用最大地面加速度等效原则确定了谱强度因子S0,然后进一步根据反应谱等效原则对谱强度因子进行了修正。经与规范中给出的反应谱曲线对比发现,利用本文模型参数按随机方法得到的反应谱与规范反应谱取得了很好的一致性。本文研究中给出的谱强度因子S0较好地反应了结构地震作用的特点,为应用随机理论进行实际工程抗震设计提供了依据。
A parameter study on seismic random model based on the new seismic code is carried out. The spectral intensity parameter S0 is proposed in the paper. It is found that the S0 can be determined by the equivalence of the maximum ground acceleration. Then, it is further modified by the equivalence of the response spectrum. The comparison between the response spectral is made. The random response spectrum got from the proposed So is in a good agreement with that given by the new code. It is confirmed that the seismic effects on the structures can be well reflected by the proposed S0.
出处
《土木工程学报》
EI
CSCD
北大核心
2003年第5期5-10,共6页
China Civil Engineering Journal
基金
北京市自然科学基金项目资助(8982004)
国家自然科学基金重大项目子课题(59895410)
