【摘要】 该文采用静力推覆和能力谱方法分析了基于我国抗震规范设计的12个Y形偏心支撑钢框架的地震反应折减系数R和超强系数及赘余度超强系数3,分析了结构层数、楼层高跨比对各系数的影响。研究结果表明:Y形偏心支撑钢框架的设计地震作用可在我国现行抗震规范的基础上降低20%左右。更多还原

【Abstract】 Twelve Y-eccentric braced steel frames were designed to complie with Chinese seismic code.The response modification factor R,overstrength factor and redundancy factor 3of each building were evaluated by the capacity spectrum method combined with the global capacity envelops obtained from an improved pushover analysis.Moreover,the effects of storey numbers and spans of the structure on these factors were analyzed.The results show that the 20% elastic design earthquake action of Y-eccentric braced steel frames can be approximately reduced on the base of Chinese seismic code.更多还原