CAJ | 학술논문

为了有效抑制基础隔震结构的隔震层及主结构的过大位移，设计了“顶吸基隔”减震结构并提出了相应的非平稳随机反应分析新方法。通过在基础隔震结构的顶部布置调谐质量阻尼器来构建减震结构，分别采用 Bouc-Wen 模型及其刚度退化模型模拟隔震层及各楼层的滞回特性。通过在精细积分法中引入复化 Cotes 积分，并结合虚拟激励法，提出了求解减震结构非平稳随机反应的 CCIM法。依据首次超越破坏准则，建立了以结构层间位移角为评价指标的动力可靠度极限状态方程。通过分别采用CCIM、蒙特卡罗法和时域显式蒙特卡罗法对减震结构进行随机反应分析，验证了 CCIM具有高效率和高精度的特点。以一座30层钢框架结构为算例，分别计算了减震结构、基础隔震结构和未控制结构在8度和9度罕遇地震作用下的随机反应。结果表明：本文提出的“顶吸基隔”减震结构的整体可靠度比基础隔震结构和未隔震结构的都要高，该减震结构具有极大的工程推广价值。
위료유효억제기출격진결구적격진층급주결구적과대위이，설계료“정흡기격”감진결구병제출료상응적비평은수궤반응분석신방법。통과재기출격진결구적정부포치조해질량조니기래구건감진결구，분별채용 Bouc-Wen 모형급기강도퇴화모형모의격진층급각루층적체회특성。통과재정세적분법중인입복화 Cotes 적분，병결합허의격려법，제출료구해감진결구비평은수궤반응적 CCIM법。의거수차초월파배준칙，건립료이결구층간위이각위평개지표적동력가고도겁한상태방정。통과분별채용CCIM、몽특잡라법화시역현식몽특잡라법대감진결구진행수궤반응분석，험증료 CCIM구유고효솔화고정도적특점。이일좌30층강광가결구위산례，분별계산료감진결구、기출격진결구화미공제결구재8도화9도한우지진작용하적수궤반응。결과표명：본문제출적“정흡기격”감진결구적정체가고도비기출격진결구화미격진결구적도요고，해감진결구구유겁대적공정추엄개치。
To effectively suppress the larger displacement of both the isolation layer and the main struc-ture of base-isolation structures,the top-absorption and base-isolation type seismic reduction structure (SRS)was designed,and a new non-stationary random seismic response analysis method applied to this structure was also presented.This seismic reduction structure was constructed by installing a tuned mass damper on the top of a base-isolation structure,and the hysteretic properties of both the isolation layer and each storey were simulated in Bouc-Wen and Bouc-Wen stiffness degradation model.The CCIM,which was applied to solve the non-stationary random response of SRS,was presented by introducing the com-posite Cotes integral into precise integral method and combining the pseudo excitation method.The dy-namic reliability limits state equation,which took structural inter-storey displacement angle as the evalua-tion index,was established on the basis of the first excursion failure criterion.Both the high efficiency and the high precision of the CCIM were validated by computing the random seismic response of SRS and com-paring CCIM's results with those of Monte Carlo method and time domain explicit Monte Carlo method,re-spectively.Taking the 30-storey steel frame structure as a numerical example,the random seismic re-sponse of SRS,base-isolation and non-isolation structures subj ected to 8 and 9 degrees rare earthquake were computed,respectively.The analysis results indicate that the whole reliability of SRS presented is higher than those of base-isolation and non-isolation structures,and this SRS has great value in practical engineering.