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（西安建筑科技大學(xué)結(jié)構(gòu)工程與抗震教育部重點(diǎn)實(shí)驗(yàn)室  710055）

［提要］ 洞口連梁是抗震剪力墻結(jié)構(gòu)多道抗震防線的第一道，其抗震性能優(yōu)劣決定整個(gè)結(jié)構(gòu)的抗震性能。但高延性、高耗能、小跨高比連梁的設(shè)計(jì)仍是國內(nèi)外抗震鋼筋混凝土結(jié)構(gòu)中至今未能有效解決的問題之一。提出了一種沿梁截面高度將箍筋分三層布置的新配筋方案，做了3個(gè)試件的試探性試驗(yàn)，研究了名義剪壓比、剪箍比、配箍特征值等因素對(duì)新配筋小跨高比連梁的延性、耗能性能、破壞形態(tài)的影響。試驗(yàn)證明新配筋方案連梁的抗震性能優(yōu)良、施工方便，是解決這一問題的一個(gè)有效途徑。

［關(guān)鍵詞］  鋼筋混凝土  抗震聯(lián)肢剪力墻  小跨高比連梁  抗震設(shè)計(jì)  試驗(yàn)研究

Experiment Research on Seismic Performance of New Reinforcement Scheme Deep Coupling Beam/Liang Xingwen, Liu Qingshan, Li Ping(Xi"an University of Architecture and Technology, Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education,  Xi"an  710055,  China)

Abstract:Coupling beams between openings of coupled shear walls are the first defense against earthquake loading, whose earthquake resistant performance is the key to the whole structure. In view of the seismic coupling beam with small span to depth ratio with good ductility and energy dissipation hasn"t been discovered so far. A new reinforcement scheme coupling beam in which the stirrup is divided into three rings along the depth of coupling beam is put out. Tentative test for three short coupling beams specimens has been carried out. Some factors such as the ratio of nominal shear stress to concrete compressive strength, the ratio of shear to shear resistance and stirrup index have been studied, which has effect on ductility, energy dissipation and failure mode. It has been proved that the earthquakeresistant performance of the new reinforcement scheme coupling beam is superior to the current reinforcement scheme coupling beam and construction of the former is easy. The new reinforcement scheme coupling beam is an available way to solve the problem.

Keywords:reinforced concrete; earthquake resistant coupled shear walls; coupling beam with small span to depth ratio; earthquake resistant design; experiment research

*國家自然科學(xué)基金資助項(xiàng)目（50678146）。