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（華東建筑設(shè)計(jì)研究院有限公司， 上海 200011）

［摘要］隨著消能減震技術(shù)的發(fā)展和應(yīng)用，采用阻尼器產(chǎn)品的工程項(xiàng)目迅速增多，其中有較大比例的項(xiàng)目采用的是位移型金屬阻尼器。采用這類阻尼器時(shí)需要計(jì)算結(jié)構(gòu)小震附加阻尼比，目前《消能減震技術(shù)規(guī)程》（JGJ 297—2013）中建議計(jì)算小震附加阻尼比的方法有兩種：時(shí)程分析法和基于反應(yīng)譜的線性迭代法，這兩類方法在實(shí)際應(yīng)用時(shí)相對(duì)比較復(fù)雜。例如：采用時(shí)程分析法時(shí)需要選取多條地震波進(jìn)行分析，選波和計(jì)算都比較繁瑣；線性迭代法則需要進(jìn)行多次迭代，并且每個(gè)模型中阻尼器的等代截面需要不斷調(diào)整，工作量大，效率低。提出了一種新的基于反應(yīng)譜的附加阻尼比計(jì)算思路，可稱之為“放大剛度法”，整個(gè)分析過程只需在一個(gè)分析模型中調(diào)整即可算出結(jié)構(gòu)相應(yīng)的附加阻尼比，方便可靠。該方法特別適用于方案設(shè)計(jì)階段以快速確定阻尼器的參數(shù)和附加阻尼比的大小，減小設(shè)計(jì)方案的周期。本文還對(duì)一個(gè)實(shí)際工程項(xiàng)目用該方法進(jìn)行阻尼比的計(jì)算和阻尼器參數(shù)確定，并且用時(shí)程分析法進(jìn)行復(fù)核，驗(yàn)證了該方法的可靠性。

［關(guān)鍵詞］消能減震； 附加阻尼比； 反應(yīng)譜； 時(shí)程分析； 位移型阻尼器； 放大剛度法

中圖分類號(hào)：TU352文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)12-0036-05

Additional damping ratio calculation method based on response spectrum and engineering application

Xu Jidong

（East China Architectural Design & Research Institute Co.，  Ltd.，  Shanghai 200011, China）

Abstract:With the development and application of energy dissipation technology, the number of projects using dampers increase rapidly. There is a large proportion of the dampers are the metal dampers. It′s necessary to calculate the additional damping ratio when using this kind of damper. At present, there are two kinds of methods proposed in the Technical Specification for Building with Energy Dissipation Devices (JGJ 297—2013): time history analysis method and linear iterative method based on response spectrum. These two kinds of methods are relatively complicated in practical application, for example: multi seismic waves are needed in time history analysis method, seismic waves selection and calculation are more complex. The linear iterative method needs many iterations, and the equivalent element of the damper in each model needs to be adjusted. This method is heavy workload and low efficient. A new calculation method of additional damping ratio based on response spectrum was proposed, it can be called “amplification stiffness method”. In the whole analysis process, the additional damping ratio of the structure can be calculated only by adjusting one model, it′s more convenient and reliable. The method is especially suitable for the design phase to determine the parameters of the damper and the additional damping ratio，it can reduce the design cycle. The damping ratio was calculated and the damper parameters were determined by this method in a practical project, and checked by the time history analysis method, the reliability of the method was verified.

Keywords:energy dissipation; additional damping ratio; response spectrum; time history analysis; displacement dependence damper; amplifying stiffness method

*國(guó)家自然科學(xué)基金項(xiàng)目（51478356）。

作者簡(jiǎn)介：徐繼東，碩士，工程師，Email:eastd@126.com。