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（甘肅省建筑設(shè)計(jì)研究院有限公司， 蘭州 730030）

［摘要］結(jié)合某高地震烈度區(qū)工程，對(duì)混凝土框架-屈曲約束支撐結(jié)構(gòu)的抗震設(shè)計(jì)方法以及相關(guān)問(wèn)題進(jìn)行了研究。分析了混凝土框架-屈曲約束支撐結(jié)構(gòu)的最大適用高度、合理的附加剛度、適宜的層間位移角限值，并通過(guò)罕遇地震下的彈塑性時(shí)程分析考察結(jié)構(gòu)的抗震性能。結(jié)果表明：混凝土框架-屈曲約束支撐結(jié)構(gòu)的抗震性能優(yōu)于純混凝土結(jié)構(gòu)，主體混凝土框架更容易成為“損傷可控結(jié)構(gòu)”，實(shí)現(xiàn)震后可恢復(fù)性；建議混凝土框架-屈曲約束支撐結(jié)構(gòu)的最大適用高度按混凝土框架結(jié)構(gòu)和框架-抗震墻結(jié)構(gòu)二者最大適用高度的平均值采用；為控制主體混凝土框架的損傷，屈曲約束支撐按剛度分配的地震傾覆力矩宜大于結(jié)構(gòu)總地震傾覆力矩的50%，在各層承擔(dān)的樓層地震剪力不宜小于30%；建議屈曲約束支撐的附加剛度比控制在1左右，延性系數(shù)不小于3；混凝土框架-屈曲約束支撐結(jié)構(gòu)相對(duì)于混凝土框架結(jié)構(gòu)的層間位移角限值，在多遇地震下應(yīng)根據(jù)支撐不屈服的要求做適當(dāng)調(diào)整。

［關(guān)鍵詞］混凝土框架-屈曲約束支撐結(jié)構(gòu)； 損傷可控結(jié)構(gòu)； 附加剛度比

中圖分類(lèi)號(hào)：TU318-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)03-0059-07

Research on application of concrete frame-buckling restrained braced structure in high seismic intensity area

Huang Rui，　Yao Peixin

（Gansu Provincial Architectural Design & Research Institute Ｃo.， Ltd.， Lanzhou 730030，  China）

Abstract:Combined with a project in high seismic intensity area, the seismic design method and related problems of concrete frame-buckling restrained braced structure were studied. The maximum applicable height, reasonable additional stiffness and appropriate limit value of interlayer displacement angle of the concrete frame-buckling restrained braced structure were analyzed, and the seismic performance of the structure was investigated by elastic-plastic time-history analysis under the rare earthquake. The results show that the seismic performance of the concrete frame-buckling restrained braced structure is better than that of the pure concrete frame structure, and the main concrete frame is more likely to become a “damage controlled structure” to achieve post-earthquake recoverability. It is suggested that the maximum applicable height of the concrete frame-buckling restrained braced structure should be the average of the maximum applicable height of the concrete frame structure and the frame-wall structure. In order to control the damage of the main concrete frame, the seismic overturning moment distributed in the buckling restrained brace according to the rigidity shall be greater than 50% of the total seismic overturning moment of the structure, and the seismic shear force on each floor shall not be less than 30%. It is recommended that the additional rigidity ratio of the buckling restrained brace shall be controlled at about 1, and the ductility coefficient shall not be less than 3. The limit value of the interlayer displacement angle of the concrete frame buckling restrained braced structure relative to the concrete frame structure should be adjusted properly according to the non-yielding requirement of the brace under the frequent earthquake.

Keywords:concrete frame-buckling restrained braced structure; damage controllable structure; additional stiffness ratio

作者簡(jiǎn)介：黃銳，學(xué)士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：huang.r@126.com。