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(西安交通大學(xué)人居環(huán)境與建筑工程學(xué)院， 西安 710054)

［摘要］作為一種常見的耗能減震構(gòu)件，屈曲約束支撐越來越廣泛地應(yīng)用于鋼筋混凝土框架結(jié)構(gòu)中，然而現(xiàn)行《建筑抗震設(shè)計(jì)規(guī)范》（GB 50011—2010）(2016版)和《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）(2015版)并沒有明確給出這類結(jié)構(gòu)的彈性層間位移角限值?；贏NSYS軟件，分別對(duì)純框架結(jié)構(gòu)和含屈曲約束支撐的鋼筋混凝土框架結(jié)構(gòu)（簡稱BRB-RC框架結(jié)構(gòu)）進(jìn)行非線性有限元分析，結(jié)果表明BRB-RC框架結(jié)構(gòu)應(yīng)當(dāng)考慮更為嚴(yán)格的水平位移控制參數(shù)，并通過靜力試驗(yàn)驗(yàn)證了數(shù)值模擬的可靠性。當(dāng)確定彈性層間位移角限值的建議取值時(shí)，發(fā)現(xiàn)若采用初裂層間位移角作為位移角限值偏于嚴(yán)格，無法直接用于工程實(shí)踐?；诒容^分析法提出了標(biāo)記層間位移角的概念。通過改變支撐參數(shù)、混凝土強(qiáng)度和結(jié)構(gòu)跨度，進(jìn)行9組算例的數(shù)值計(jì)算和分析，研究這9個(gè)試件標(biāo)記層間位移角與剛度比的關(guān)系，最終保守地給出了BRB-RC框架結(jié)構(gòu)彈性層間位移角限值的取值公式。提出的方法能夠滿足工程實(shí)踐的需要。

［關(guān)鍵詞］屈曲約束支撐； 鋼筋混凝土框架； 彈性層間位移角限值

中圖分類號(hào)：TU318+.1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)13-0106-08

Research of limit of elastic inter-story drift ratio for RC frame with bucking restrained braces

Yue Yanchao, Lu Xiaoming, Wang Yan

(School of Human Settlements and Civil Engineering, Xi′an Jiaotong University, Xi′an 710054, China)

Abstract:Buckling restrained brace (BRB), which is widely used in reinforced concrete frame structures, is a kind of common energy dissipated component. However, the current Code for seismic design of building (GB 50011—2010)(2016 edition) and Code for design of concrete structures (GB 50010—2010)(2015 edition) do not explicitly provide the limit of elastic inter-story drift ratio of the structure. Based on ANSYS software, nonlinear finite element analysis was carried out on pure frame and RC frame with bucking restrained braces(BRB-RC frame)  respectively. The results show that more strict horizontal displacement control parameters should be considered for BRB-RC frame, and the reliability of numerical simulation was verified by static test. When determining the suggested value of limit of  the elastic inter-story drift ratio, it was found that directly using the inter-story drift ratio between initial cracked layers as limit of elastic inter-story drift ratio is too strict to be used in engineering practice. Based on comparative analysis, the concept of marked inter-story drift ratio was proposed. By changing the supporting parameters, concrete strength and structural span, the numerical calculation and analysis of nine sets of examples were carried out, and the relationship between the marked inter-story drift ratio and the stiffness ratio of the nine specimens was studied.In the end, the formula of limit of elastic inter-story drift ratio for reinforced concrete frame with bucking restrained braces was conservatively given. The method proposed  can meet the  needs of enineering practice.

Keywords:bucking restrained brace; reinforced concrete frame; limit of elastic inter-story drift ratio

*國家自然科學(xué)基金項(xiàng)目(51408481)。

作者簡介：岳焱超，博士，講師， Email: 1528017958@qq.com。