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（1 遼寧工業(yè)大學(xué)土木建筑工程學(xué)院， 錦州 121001； 2 盤錦職業(yè)技術(shù)學(xué)院建筑工程分院， 盤錦 124000）
［摘要］為了研究再生粗骨料取代率對無腹筋玄武巖纖維增強復(fù)合材料筋（BFRP筋）再生混凝土梁的抗剪性能的影響，進行了足尺無腹筋BFRP筋再生混凝土梁抗剪性能試驗。通過四點彎曲加載，研究了再生粗骨料取代率(0，30%，60%，100%)對4根無腹筋BFRP筋再生混凝土梁的裂縫開展、破壞形態(tài)、開裂荷載、跨中撓度、荷載-應(yīng)變及抗剪承載力的影響。試驗結(jié)果表明：所有試驗梁均發(fā)生剪切破壞； 相同荷載作用下，梁的撓度隨再生粗骨料取代率的增加而增大； 隨再生粗骨料取代率的增加，梁的裂縫數(shù)量和斜裂縫平均寬度均增大； 同一荷載作用下，BFRP筋再生混凝土梁的跨中縱筋應(yīng)變大于BFRP筋普通混凝土梁； BFRP筋再生混凝土梁的抗剪承載力較BFRP筋普通混凝土梁低，并隨著再生粗骨料取代率的增大而降低。通過承載力的試驗值與理論值對比研究，驗證了加拿大規(guī)范（CSA.S803-12）中規(guī)定的計算方法對無腹筋BFRP筋再生混凝土梁抗剪承載力的適用性。
［關(guān)鍵詞］BFRP筋； 再生粗骨料取代率； 無腹筋混凝土梁； 撓度； 抗剪承載力
中圖分類號：TU377文獻標(biāo)識碼：A文章編號：1002-848X(2020)22-0089-04
Influence of recycled coarse aggregate replacement rate on shear performance of BFRP bar reinforced recycled concrete beam without stirrups
PENG Changling1, LIU Huaxin1, CHEN Ming2, LI Qingwen1, WANG Xuezhi1
(1 School of Civil Engineering and Architecture, Liaoning University of Technology, Jinzhou 121001, China;2 Building Engineering Branch, Panjin Vocational Technical College, Panjin 124000, China)
Abstract:In order to study the influence of recycled coarse aggregate replacement rate on the shear performance of basalt fiber reinforced polymer(BFRP) bar reinforced recycled concrete beam without stirrups, the shear performance test was conducted on the full-scale BFRP bar reinforced recycled concrete beam without stirrups. The influence of recycled coarse aggregate replacement rate (0, 30%, 60%, 100%) on the crack development, failure form, cracking load, mid-span deflection, load-strain and shear bearing capacity of four BFRP bar reinforced recycled concrete beam without stirrups was studied by four-point bending loading. The test results show that all the test beams have shear failure; under the same load, the deflection of the beam increases with the increase of recycled coarse aggregate replacement rate; with the increase of recycled coarse aggregate replacement rate, both the number of cracks and the average width of inclined cracks increase; under the same load, the strain of the mid-span longitudinal reinforcement of the BFRP bar reinforced recycled concrete beam without stirrups is greater than that of the BFRP bar ordinary concrete beam; the shear capacity of BFRP bar reinforced recycled concrete beam without stirrups is lower than that of BFRP bar ordinary concrete beam and decreases with the increase of recycled coarse aggregate replacement rate. The applicability of the calculation method in the Canadian Code (CSA.S803-12) for the shear bearing capacity of BFRP bar reinforced recycled concrete beam without stirrups is verified by comparing the experimental and theoretical values of the bearing capacity.
Keywords:basalt fiber reinforced polymer bar; recycled coarse aggregate replacement rate; concrete beam without stirrup; deflection; shear bearing capacity
*遼寧省自然科學(xué)基金（2015020208），遼寧省教育廳科研項目（JJL201915404）。
作者簡介：彭長嶺，碩士，Email:pengchangling223@163.com； 通信作者：陳明，學(xué)士，講師，Email:1176731669@qq.com。
