高层基础隔震结构高宽比限值分析
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摘要
研究了橡胶支座高层基础隔震结构的高宽比限值。考虑到高阶振型对结构高宽比限值的影响,采用3质点模型推导了高层隔震结构高宽比限值的显式,给出各种建筑类别、设防烈度、场地条件和结构阻尼比的高宽比限值,并按简便、安全的原则对各种工况下的高宽比限值进行了归并,与采用单质点模型的计算结果对比后发现相差不大,说明高阶振型对高层基础隔震结构高宽比限值的影响不大。还进一步讨论了当隔震周期不等于临界周期时高宽比限值的变化情况,发现当隔震周期小于临界周期时高宽比限值的降低并不明显,当隔震周期大于临界周期时高宽比限值的降低比较明显。
The limit of height-width ratio of high-rise base-isolated structure with rubber bearings was investigated.With 3-particle model being adopted,the limit ratio formulas were derived and the results were presented corresponding to various kinds of building categories,earthquake fortification intensities,site classifications,and damping ratios of structure.In conformity to the principle of simplicity and safety,the calculated limit ratios were summarized.By comparing the results with those of single-particle model,it is shown that there is little difference between them,which indicates that high-order modes have little effect on the limit of height-width ratio of high-rise base-isolated structure.The changes of the limit of height-width ratio were further discussed when the basic period is not equal to the critical period,and it is found that when the basic period is less than the critical period,the limit of height-width ratio dose not significantly reduce,and when the basic period is greater than critical period,the limit of height-width ratio reduces obviously.
The limit of height-width ratio of high-rise base-isolated structure with rubber bearings was investigated.With 3-particle model being adopted,the limit ratio formulas were derived and the results were presented corresponding to various kinds of building categories,earthquake fortification intensities,site classifications,and damping ratios of structure.In conformity to the principle of simplicity and safety,the calculated limit ratios were summarized.By comparing the results with those of single-particle model,it is shown that there is little difference between them,which indicates that high-order modes have little effect on the limit of height-width ratio of high-rise base-isolated structure.The changes of the limit of height-width ratio were further discussed when the basic period is not equal to the critical period,and it is found that when the basic period is less than the critical period,the limit of height-width ratio dose not significantly reduce,and when the basic period is greater than critical period,the limit of height-width ratio reduces obviously.
引文
[1]吴香香,孙丽,李宏男.竖向地震动对隔震结构高宽比限值的影响分析[J].沈阳建筑工程学院学报,2002,18(2):81-84.
[2]李宏男,吴香香,橡胶垫支座隔震结构高宽比限值研究[J].建筑结构学报,2003,24(2):14-19.
[3]吴香香,李宏男.竖向地震动对基础隔震结构高宽比限值的影响[J].同济大学学报,2004,32(1):10-14.
[4]谷伟,刘斌.橡胶垫基础隔震结构考虑竖向地震作用高宽比限制研究[J].工业建筑,2004,34(10):17-20.
[5]祁皑,范宏伟.基于结构设计的基础隔震结构高宽比限值的研究[J].土木工程学报,2007,40(4):13-20.
[6]祁皑,范宏伟.基础隔震结构高宽比限值的研究[J].建筑结构学报,2004,25(6):52-58.
[7]刘文光,杨巧荣,周福霖.大高宽比隔震结构地震反应的实用分析方法[J].地震工程与工程振动,2004,24(4):116-121.
[8]付伟庆,王焕定,丁琳,等.规则型高层隔震结构实用设计方法研究[J].哈尔滨工业大学学报,2007,(10):1541-1545.
[9]商昊江,祁皑,范宏伟.高层隔震结构等效模型研究[J].福州大学学报,2011,39(1):1-10.
[10]GB50011-2010.建筑结构抗震设计规范[S].北京:中国建筑工业出版社,2010.
[11]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
[2]李宏男,吴香香,橡胶垫支座隔震结构高宽比限值研究[J].建筑结构学报,2003,24(2):14-19.
[3]吴香香,李宏男.竖向地震动对基础隔震结构高宽比限值的影响[J].同济大学学报,2004,32(1):10-14.
[4]谷伟,刘斌.橡胶垫基础隔震结构考虑竖向地震作用高宽比限制研究[J].工业建筑,2004,34(10):17-20.
[5]祁皑,范宏伟.基于结构设计的基础隔震结构高宽比限值的研究[J].土木工程学报,2007,40(4):13-20.
[6]祁皑,范宏伟.基础隔震结构高宽比限值的研究[J].建筑结构学报,2004,25(6):52-58.
[7]刘文光,杨巧荣,周福霖.大高宽比隔震结构地震反应的实用分析方法[J].地震工程与工程振动,2004,24(4):116-121.
[8]付伟庆,王焕定,丁琳,等.规则型高层隔震结构实用设计方法研究[J].哈尔滨工业大学学报,2007,(10):1541-1545.
[9]商昊江,祁皑,范宏伟.高层隔震结构等效模型研究[J].福州大学学报,2011,39(1):1-10.
[10]GB50011-2010.建筑结构抗震设计规范[S].北京:中国建筑工业出版社,2010.
[11]周福霖.工程结构减震控制[M].北京:地震出版社,1997.
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