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盧德輝，張超，周云，馮啟浩

（廣州大學(xué)土木工程學(xué)院， 廣州  510006）

［摘要］通過(guò)理論公式推導(dǎo)，對(duì)不同隔震支座拉壓剛度比下，采用線性組合法(LCM)和非線性組合法(NLCM)對(duì)隔震層受拉程度的影響進(jìn)行了研究，并結(jié)合某高層建筑隔震實(shí)例，分析了采用線性組合法計(jì)算上部結(jié)構(gòu)效應(yīng)的誤差。研究結(jié)果表明：相對(duì)于非線性組合法，由線性組合法計(jì)算得出的隔震層受拉區(qū)長(zhǎng)度偏小，且偏差程度隨著隔震支座拉壓剛度比的減小而增大，即偏于不安全；當(dāng)采用線性組合法時(shí)，部分樓層減震系數(shù)、隔震支座最大位移、最大拉應(yīng)力、最大剪力以及部分隔震支座最大壓力和壓應(yīng)力均偏小，即線性組合法計(jì)算結(jié)果偏于不安全；高層隔震計(jì)算中應(yīng)考慮支座拉壓剛度不等性，即應(yīng)按實(shí)際荷載工況順序依次加載（NLCM），且要考慮上部結(jié)構(gòu)的重力二階效應(yīng)。

［關(guān)鍵詞］高層隔震； 效應(yīng)組合； 隔震分析； 拉應(yīng)力； 線性組合

中圖分類號(hào)：TU352.1  文獻(xiàn)標(biāo)識(shí)碼：A   文章編號(hào)：1002-848X(2016)01-0013-06

Discussion for effect combinations of high-rise building isolation analysis

Lu Dehui, Zhang Chao, Zhou Yun, Feng Qihao

(School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:Through deducing theoretical formulas, the influences of linear combination method (LCM) and nonlinear combination method (NLCM) on tensional degree of isolation layer were researched. Based on the case study of a practical high-rise isolation building, the deviation in calculation results of upper structure effect with LCM was analyzed. It is concluded that: compared to NLCM,  a more conservative calculation result of tensional region length of isolation layer is obtained by LCM, and the deviation degree increases with the decrease of isolation bearing tension-compression stiffness ratio, which means an unsafely isolating design of high-rise buildings. The calculation results of LCM are generally less than those of NLCM, including factors of seismic reduction coefficients of some layers, maximum displacement of isolation bearing, maximum tensile stress, maximum shear force, as well as maximum compression force and maximum compression stress of some isolation bearings, which means an unsafe result of LCM. Differences in the tension and compression stiffness of isolation bearing should be considered in high-rise building isolation calculation. The loading sequence should follow in the order of the actual loading conditions (NLCM), and second-order gravity effect of the upper structure should be considered.

Keywords:high-rise building isolation; effect combination; isolation analysis; tensile stress; linear combination

*廣東省自然科學(xué)基金團(tuán)隊(duì)項(xiàng)目（8351009101000001），教育部長(zhǎng)江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃項(xiàng)目（IRT13057）。

作者簡(jiǎn)介：盧德輝，博士研究生，Email：ludehui87@163.com。