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（1 山地城鎮(zhèn)建設(shè)與新技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室， 重慶大學(xué)， 重慶 400045；2 中國(guó)建筑科學(xué)研究院有限公司， 北京 100013；3 重慶大學(xué)土木工程學(xué)院， 重慶 400045； 4 安陽(yáng)合力創(chuàng)科冶金新技術(shù)股份有限公司， 安陽(yáng) 455000）

［摘要］為研究配置CRB600H高強(qiáng)箍筋混凝土柱的抗震抗剪性能，進(jìn)行了6根配置CRB600H箍筋混凝土柱的低周反復(fù)加載試驗(yàn)，對(duì)試件的破壞形態(tài)、滯回曲線、位移延性以及縱筋和箍筋的應(yīng)變進(jìn)行了分析。試驗(yàn)結(jié)果表明：高強(qiáng)箍筋混凝土柱均呈剪切破壞形態(tài)，失效時(shí)的位移延性系數(shù)均達(dá)到3-0以上，極限位移角達(dá)到或接近1/50；各試件中的箍筋在峰值荷載狀態(tài)下均能達(dá)到屈服。將試驗(yàn)結(jié)果與我國(guó)《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》（GB 50010—2010）以及美國(guó)規(guī)范ACI 318-14中抗震抗剪承載力計(jì)算公式的計(jì)算結(jié)果進(jìn)行了對(duì)比。結(jié)果表明，采用上述規(guī)范公式計(jì)算高強(qiáng)箍筋混凝土柱的抗震抗剪承載力時(shí)，如果高強(qiáng)箍筋的強(qiáng)度取實(shí)際屈服強(qiáng)度，與試驗(yàn)結(jié)果相比計(jì)算結(jié)果偏高。根據(jù)試驗(yàn)與收集的39個(gè)配置高強(qiáng)箍筋混凝土柱的抗震抗剪試驗(yàn)結(jié)果，提出了適用于屈服強(qiáng)度為500～600MPa高強(qiáng)箍筋混凝土柱的抗震抗剪承載力計(jì)算公式，并建議了高強(qiáng)箍筋強(qiáng)度上限值的取值。

［關(guān)鍵詞］高強(qiáng)箍筋； 混凝土柱； 剪切強(qiáng)度； 低周反復(fù)加載試驗(yàn)

中圖分類號(hào)：TU375-3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)09-0099-08

Research on seismic shear behavior of concrete columns with CRB600H stirrups

Hao Xin1,3， Zhu Aiping2， Zhai Wen4， Jiang Bo2

（1 Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China;  2 China Academy of Building Research, Beijing 100013, China; 3 School of Civil Engineering, Chongqing University,  Chongqing 400045, China; 4 Anyang Heli Techtronic Co., Ltd., Anyang 455000, China)

Abstract:Low frequency cyclic loading tests for 6 concrete columns with CRB600H stirrups were conducted to evaluate the seismic shear behavior of the concrete columns with CRB600H stirrups. The failure patterns, hysteretic curves, displacement ductility, longitudinal reinforcement strain and stirrups strain of the specimens were studied. The experimental results show that the specimens of columns with high-strength stirrups (HSS) are in shear failure modes. The displacement ductility factor  is above 3-0 when the column fails, and the ultimate displacement angle reaches or is close to 1/50. The HSS in each specimen can yield under the peak load condition. The experimental results were compared with the calculated results of the formulas for the seismic shear strength in Chinese code Code for design of concrete structures (GB 50010—2010) and American ACI 318-14 code. It shows that when calculating the seismic shear capacity of columns with HSS using the above formula, if the actual yield strength of HSS is taken, the calculation results are higher than the experimental results. Based on the results of 39 seismic and shear tests of columns with HSS which are from experiment and collection, the formulas for calculating the seismic and shear bearing capacity of columns with HSS of 500~600MPa and the upper limit value of HSS were proposed.

Keywords:high-strength stirrup; concrete column;  shear strength; low frequency cyclic loading test

通訊作者：朱愛萍，博士，研究員，Email：zap1366@126.com。