- 摘 要
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(中國建筑科學研究院，北京 100013)
［摘要］抗扭設(shè)計是高層建筑結(jié)構(gòu)設(shè)計中的重要問題。首先闡述了影響結(jié)構(gòu)扭轉(zhuǎn)激振和反應(yīng)的主要因素及控制措施，并從“避開扭轉(zhuǎn)反應(yīng)的最大峰值”、“降低結(jié)構(gòu)扭轉(zhuǎn)反應(yīng)對偏心率的敏感性”和“鑒別抗扭剛度不足的結(jié)構(gòu)”三個方面，說明了控制周期比的必要性以及《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》（JGJ 3—2010）周期比控制方法的合理性；其次討論了高層結(jié)構(gòu)的周期比與結(jié)構(gòu)高度的關(guān)系，對于彎曲型或彎剪型結(jié)構(gòu)，指出“若平面布局相同，高度越大、周期比越小、相對抗扭剛度越大、扭轉(zhuǎn)反應(yīng)越小”的規(guī)律是成立的且合理的；最后證明了對于滿足剛性樓面假定的結(jié)構(gòu)，如果結(jié)構(gòu)最大層間位移角和層間位移比滿足高規(guī)的基本限值要求，樓層的扭轉(zhuǎn)將會被控制在較小的量級，該量級的扭轉(zhuǎn)可能會影響巨型截面柱的抗扭承載力設(shè)計，而對普通柱的抗扭承載力設(shè)計一般情況下則影響較小。
［關(guān)鍵詞］周期比; 固有抗扭特性; 抗扭布局合理性; 扭轉(zhuǎn)反應(yīng); 抗扭承載力
中圖分類號：TU973 文獻標識碼：A 文章編號：1002-848X(2014)12-0001-06
Research on several problems in the torsional resisting design of high-rise building structures
Xu Peifu, Huang Jifeng, Chen Fusheng
(China Academy of Building Research, Beijing 100013, China)
Abstract: Torsional resisting design is one of the important problems in the design of high-rise building structures. Firstly, the major factors influencing the structural torsional response and its control measures were expounded. The necessity to control the period ratio and the rationality of the period ratio control method in Technical specification for concrete structures of tall building (JGJ 3—2010) were discussed in terms of avoiding the structural peak torsional response, reducing the sensitivity of structural torsional responses to mass eccentricities and identifying the structures lack of stiffness. Secondly, the relationship between the period ratio and the structural height was investigated. It was pointed out that, for the flexural or flexural-shearing mixed building structures, if the plane layout is same, it is valid and reasonable that the decreasing of the period ratio and the increasing of relative torsional stiffness would coincide with the increasing of structural height. At last, for the structures that satisfying the assumption of rigid diaphragm, it was proved that if the maximum interstorey drift and the ratio of the maximum interstorey drift to the average value is located in the range of code limitations, the torsional deformations will be limited in a less magnitude. The torsional deformations in such magnitude may have influence on the torsional resisting strength design of the columns with mega sections and have slight influence on the torsional resisting strength design of the columns with common sections.
Keywords: period ratio; intrinsic torsional resisting property; rationality of torsional resisting floor plan; torsional response; torsional resisting strength
作者簡介：徐培福，研究員，博士生導師。
參考文獻
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