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(清華大學(xué)結(jié)構(gòu)工程與振動(dòng)教育部重點(diǎn)實(shí)驗(yàn)室 北京 100084)
【提要】 對(duì)一幢高層建筑結(jié)構(gòu)的計(jì)算分析表明，用CQC法計(jì)算的結(jié)構(gòu)位移比有可能誤判結(jié)構(gòu)的扭轉(zhuǎn)規(guī)則性。提出了三種計(jì)算結(jié)構(gòu)位移比的補(bǔ)充方法，即第一振型法、彈性時(shí)程分析法和推算平面端部位移法。用推算平面端部位移法計(jì)算了一組偏心程度不同的算例的位移比，提出了與CQC法及規(guī)范位移比限值有較好線性相關(guān)性的判別扭轉(zhuǎn)不規(guī)則的位移比值。
【關(guān)鍵詞】 高層建筑 扭轉(zhuǎn)不規(guī)則 位移比 計(jì)算方法
Study on Calculating Methods of Displacement Ratio Used to Judge Structural Torsion Irregularity/Qian Jiaru,Jiang Jun (Key Laboratory for Structural Engineering & Vibration of Education Ministry,Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
Abstract:Analytical results of a highrise building indicate that wrong judgement of structure regularity is possible by using displacement ratios calculated by CQC method. Three additional displacement ratio calculating methods,i.e.,the first mode method,elastic time history analysis method and calculating plane end displacement method,are suggested. The third method is used to calculate the displacement ratios of a set of building calculating examples with different degree of irregularity. Displacement ratio values used to judge the torsion irregularity of buildings are proposed and  have a good linear relativity with CQC method and the  displacement ratio values in current code.
Keywords:highrise building; torsion irregularity; displacement ratio; calculating method