- 摘 要
-
（華東建筑設(shè)計(jì)研究院有限公司， 上海 200011）
［摘要］討論了連體高層結(jié)構(gòu)在水平地震作用下的耦聯(lián)振動機(jī)理。提出一種“比例之比”理論方法，用以研究連體高層結(jié)構(gòu)不同塔樓在地震作用下的相互“幫扶”規(guī)律，推導(dǎo)了基本表達(dá)式，在此基礎(chǔ)上通過簡化算例對理論分析的規(guī)律進(jìn)行驗(yàn)證。基于振型參與系數(shù)的基本原理研究連接體對結(jié)構(gòu)總地震力的影響規(guī)律，首先對單塔結(jié)構(gòu)高階振型的參與貢獻(xiàn)進(jìn)行分析，對比了采用伯努利歐拉梁自由振動理論和假定振型法對高層結(jié)構(gòu)高階振型參與系數(shù)計(jì)算結(jié)果的一致性，并將假定振型法運(yùn)用到連體高層結(jié)構(gòu)高階振型影響的分析中，給出連接體對連體結(jié)構(gòu)總地震力影響規(guī)律的理論表達(dá)式，結(jié)果表明連接體的存在雖然增加了結(jié)構(gòu)的剛度，但總的地震力仍有可能降低，通過簡化案例的數(shù)值分析也驗(yàn)證了這一結(jié)論。
［關(guān)鍵詞］連體高層結(jié)構(gòu)； 振型參與系數(shù)； 耦聯(lián)振動； “幫扶”效應(yīng)
中圖分類號：TU972文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)12-0011-06
Study on horizontal coupled vibration response mechanism of high-rise connecting structure
Zhou Jianlong， An Donyga
(East China Architectural Design & Research Institute Co., Ltd.， Shanghai 200011, China)
Abstract:The coupled vibration mechanism of high-rise connecting structure under horizontal seismic load was studied. A new theoretical method of “proportion ratio” was presented, which was used to study the interaction and mutual helping mechanism between different towers of high-rise connecting structures under the action of earthquakes, and basic formulas were deduced. On this basis, the law of theoretical analysis was verified by a simplified example. The influence of the connector on total seismic force of high-rise connecting structure was studied based on modal participation factor principle. First, participating coefficient of high-order mode for single tower structure in high-modes was analyzed. Modal participation factors of high-order mode based on free vibration theory of Bernoulli-Euler beam and assumed mode shape theory were proved to be identical, and the latter theory method was selected to study the influence of high-order mode for connecting structure. The theoretic expression of the influence of the connector on total seismic force shows that structural stiffness is increased due to the existence of the connector while total seismic force is still likely to decrease. Numerical analyses of the simplified example come to the same conclusion.
Keywords:high-rise connecting structure; participating coefficient of vibration mode; coupled vibration; helping effect
*“上海超高層建筑設(shè)計(jì)工程技術(shù)研究中心”建設(shè)項(xiàng)目（14DZ2252800）
作者簡介：周建龍，本科，教授級高級工程師，Email：zjl0209@ecadi.com。
- 下載地址
-
