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（中國(guó)中元國(guó)際工程有限公司， 北京 100089）

［摘要］減震系數(shù)法作為傳統(tǒng)的隔震結(jié)構(gòu)計(jì)算方法，是將隔震結(jié)構(gòu)等效為降度后的抗震結(jié)構(gòu)進(jìn)行反應(yīng)譜分析，該方法無法真實(shí)地反映隔震結(jié)構(gòu)的變形及受力狀態(tài)。采用反應(yīng)譜法對(duì)基于隔震層“等效剛度”和“等效阻尼”的“一體化”模型進(jìn)行分析，通過三種常用結(jié)構(gòu)體系的模型算例，對(duì)比反應(yīng)譜法與時(shí)程分析法的計(jì)算結(jié)果，以研究用反應(yīng)譜法分析帶隔震層的“一體化”模型的適用性。研究表明，在隔震層彈塑性行為較為明顯時(shí)，反應(yīng)譜法可能低估隔震結(jié)構(gòu)上部樓層的剪力，導(dǎo)致結(jié)構(gòu)設(shè)計(jì)的不安全。

［關(guān)鍵詞］隔震結(jié)構(gòu)； 反應(yīng)譜法； 等效線性

中圖分類號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)17-0084-05

Study on response spectrum method based on equivalent linear model of isolated structures

Shi Cheng, Zhang Tongyi, Ran Tianran, Deng Zhengyun, Huang Ming

(China IPPR International Engineering Co.,  Ltd.,  Beijing 100089, China)

Abstract:As a traditional method for calculating the isolated structure, the damping coefficient method is to analyze the response spectrum of the seismic  structure after reducing seismic fortification intensity with the equivalent of the isolated structure. This method can not truly reflect the deformation and stress state of the isolated structure. The "integrated" model based on the "equivalent stiffness" and "equivalent damping" of the isolation layer was analyzed by the response spectrum method. The model examples of three common structural systems were used to compare the response spectrum method with the time history analysis method. The calculation results were used to study the applicability of the "integrated" model with isolation layer by reaction spectrum method. Studies have shown that when the elastoplastic behavior of the isolation layer is more obvious, the response spectrum method may underestimate the shear force of the upper floor of the isolated structure, which results the unsafe of structural design.

Keywords:isolated structure; response spectrum method; equivalent linear

作者簡(jiǎn)介：石誠(chéng)，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:shichengcheng@139.com。