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（1 上海上材減振科技有限公司， 上海 200437； 2 上海消能減震工程技術(shù)研究中心， 上海 200437）

［摘要］目前工程界關(guān)于黏滯阻尼器初始剛度的取值普遍較大，這與其實(shí)際性能差別較大。過(guò)大的初始剛度取值會(huì)大大高估黏滯阻尼器在風(fēng)和地震下的耗能作用，使得結(jié)構(gòu)設(shè)計(jì)偏于不安全。結(jié)合試驗(yàn)和有限元計(jì)算結(jié)果，驗(yàn)證了黏滯阻尼器加載剛度與其初始剛度數(shù)值上近似相等。結(jié)合一個(gè)工程案例，通過(guò)對(duì)非減震模型、不同減震模型的層間位移角、層間剪力、能量分布、附加阻尼比、滯回曲線的對(duì)比分析，闡述了黏滯阻尼器初始剛度的不合理取值可能會(huì)高估黏滯阻尼器的消能作用。

［關(guān)鍵詞］黏滯阻尼器； 初始剛度； 加載剛度； 附加阻尼比； 耗能作用

中圖分類號(hào)：TU352-1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)01-0121-05

Discussion on reasonable selecting value of initial stiffness of viscous damper

YANG Kai1,2, DING Sunwei1,2, HONG Yankun1, GUO Xin1,2, ZHENG Chaofan2

(1 Shanghai SRIM Vibration Control Technology Co., Ltd., Shanghai 200437, China；2 Shanghai Engineering Research Center of Earthquake Energy Dissipation, Shanghai 200437, China)

Abstract:At present, the selecting value of the initial stiffness of viscous damper is usually very large in engineering, which is significantly different from the actual performance of viscous damper. Excessive large selecting value of initial stiffness will greatly overestimate the energy dissipation of viscous dampers under wind and earthquake, making the structural design unsafe. Combined with test results and finite element calculation results, it was verified that the loading stiffness of the viscous damper is approximately equal to its initial stiffness. Combined with an engineering case, through the comparative analysis of the inter-storey drift, inter-storey shear force, energy distribution, additional damping ratio and hysteresis curve of non-damping models and different damping models, it was expounded that the unreasonable selecting value of initial stiffness of viscous dampers may overestimates the energy dissipation of viscous dampers.

Keywords:viscous damper； initial stiffness； loading stiffness； additional damping ratio; energy dissipation

作者簡(jiǎn)介：楊凱，碩士，工程師，Email：yangkaitotongji@163.com。