卢德辉，张超，周云，冯启浩

（广州大学土木工程学院， 广州  510006）

［摘要］通过理论公式推导，对不同隔震支座拉压刚度比下，采用线性组合法(LCM)和非线性组合法(NLCM)对隔震层受拉程度的影响进行了研究，并结合某高层建筑隔震实例，分析了采用线性组合法计算上部结构效应的误差。研究结果表明：相对于非线性组合法，由线性组合法计算得出的隔震层受拉区长度偏小，且偏差程度随着隔震支座拉压刚度比的减小而增大，即偏于不安全；当采用线性组合法时，部分楼层减震系数、隔震支座最大位移、最大拉应力、最大剪力以及部分隔震支座最大压力和压应力均偏小，即线性组合法计算结果偏于不安全；高层隔震计算中应考虑支座拉压刚度不等性，即应按实际荷载工况顺序依次加载（NLCM），且要考虑上部结构的重力二阶效应。

［关键词］高层隔震； 效应组合； 隔震分析； 拉应力； 线性组合

中图分类号：TU352.1  文献标识码：A   文章编号：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

*广东省自然科学基金团队项目（8351009101000001），教育部长江学者和创新团队发展计划项目（IRT13057）。

作者简介：卢德辉，博士研究生，Email：ludehui87@163.com。