摘要
以抗震钢筋混凝土框架底层柱下端截面组合弯矩设计值增强系数的合理取值为研究对象,用底层柱底截面弯矩增强系数不同取值和上部各层柱抗弯能力不同增强措施的多种组合设计各种典型平面框架,通过非线性动力反应分析获得这些框架在罕遇地震水准的多条地面运动输入下的反应特征。在对这些反应特征进行分析的基础上得出了底层柱底截面组合弯矩增强系数的取值应与上部各层柱抗弯能力增强措施相匹配,方能取得对框架塑性铰机构最佳控制效果的结论。
By means of nonlinear seismic response analysis, characteristics of typical RC frames, designed by combination of varying amplification factors of moments at bottom sections of ground floor columns with those factors in the upper stories, are obtained. On this basis, the amplification coefficient of factored moments at the bottom section of ground floor columns is investigated. The analytical results have shown that evaluation of the amplification factor should be compatible to the flexural capacity of columns in the upper stories. As a result, optimal controlling effect on plastic hinge mechanism of these frames could be obtained.
出处
《世界地震工程》
CSCD
2002年第4期66-72,共7页
World Earthquake Engineering
基金
国家自然科学基金资助项目(59878056)
关键词
钢筋混凝土
框架结构
抗震设计
柱底弯矩增强系数
reinforced concrete
frame
seismic design
amplification factor at bottom section of columns
