【作者】 程卫山；

【导师】 周锡元； 彭凌云；

【作者基本信息】 北京工业大学 ， 土木工程， 2012， 硕士

【摘要】 本文包括两部分内容：第一部分是挑选与规范反应谱相兼容的实际地震动记录，第二部分是常规岛主厂房的减隔震设计。第一部分研究内容包括：按照现行抗震规范给出的反应谱曲线，以现有的实际地震动记录为基础，挑选符合规范谱曲线的时程记录，以供时程分析参考或选用。第二部分主要是针对一个常规岛厂房钢—混凝土混合结构进行减隔震设计，并对前后两种结构的地震响应进行了对比分析，表明隔震后结构抗震性能得到较大提升。分别叙述如下：1.目前结构时程分析方法越来越受到重视，在结构性能分析及安全评估中应用广泛。对于一个给定的结构，如何选择输入地震动及选择什么样的时程记录是一个重要的问题。基于此，本文进行了挑选地震波的相关工作。利用Matlab软件编制了相关的程序，以大量实际地震动记录为基础，选出了若干在一定周期范围内与抗震规范反应谱符合程度较好的实际记录，并将所选记录按规范中的特征周期Tg进行分组。并选取一个框架结构模型，输入所选出的地震动记录和目前常用记录进行时程分析，考察其结构响应参数（包括结构底层剪力、楼层顶点位移和最大层间位移角）。计算结果显示，单条记录作用下结构的底层剪力大于反应谱法计算的65%，多条记录作用下的均值大于反应谱法计算所得结果的80%，可以满足抗震规范的要求，且结构响应的离散性明显小于常用记录作用下的，验证了所选记录的合理性。2.隔震技术可以大幅降低结构的地震响应，以较低的成本可以挽回地震时重大的生命财产损失，在国内外的应用不断增多。而对常规岛厂房结构的隔震尚不多见，本文对山东省一个常规岛主厂房结构进行基础隔震设计。该结构为钢—混凝土框排架结构，荷载复杂，平面布置不规则。经过多次比较选择了合适的隔震支座，并在隔震层增设了若干粘滞阻尼器，以限制其水平位移。采用SAP2000进行了中震和罕遇地震作用下的计算分析，结果显示采取隔震方案后，结构的响应得到了有效的控制，上部结构基本保持在弹性范围内。更多还原

【Abstract】 This paper consists of two parts: the first part is about the selection of real groundmotions compatible with the code spectrum, the second part is the seismic isolationand reduction design of main plant of a conventional island plant. First part is to selectsome real ground motions for time-history analysis according to the responsespectrum curve given in the seismic code, based on the ground motion recordsavailable. Second part mainly includes the seismic isolation and reduction design of aconventional island plant, which is steel-concrete hybrid structure, and the dynamicresponse comparisons of two structures are made, the results show that the seismicperformance of the structure is greatly improved with the isolation system.1. Nowadays, more and more attention is being paid to structure time-historyanalysis method, which is widely used in the performance analysis and safetyassessment of structure. For a given structure, how to select input ground motions andwhat kind of records should be chosen are great issues. This paper carries on someresearch based on what have mentioned above. Based on the real records databaseavailable, related Matlab programs are written to select some records compatible withthe code spectrum curve in certain period ranges. The selected records are also begrouped in terms of characteristic period Tg. The selected records and some records incommon use are input to a frame structure model for the time-history analysis toinspect structural response parameters, including base shear force, vertexdisplacement and maximum interstory drift and so on. The results show that, the baseshear force simulated by single record is bigger than the65%of the result fromresponse spectrum method; the average values of multiple records are above the80%of the result from response spectrum method. Those results can live up to the coderequirements and show small disperse compared with the records in common use,which verify the rationality of the selected records.2. Seismic isolation technology, the applications is growing at home and abroad,which can significantly reduce the structural responses and help people to restore thesignificant loss of lives and property at a lower cost in the earthquake. However, casesof isolation technology applied in the conventional island plant structure are still rare.Base isolation is designed for a conventional island plant located in Shandongprovince, which is a steel-concrete framed bent structure with complex loading casesand irregular layout. Proper rubber bearings are chosen after making severalcomparisons and some viscous dampers are assigned in the isolation layer to limit thelevel of lateral displacement. Analyses under frequently-occurred and rarely-occurredearthquakes are taken with SAP2000, the results show the responses of the structureare effectively controlled and the upper-structure is almost elastic.更多还原