活性粉末混凝土梁斜裂缝宽度影响参数探析.pdf

第60卷摇 第7期 铁 道 标 准 设 计 Vol.60摇 No.7 2016年7月 RAILWAY摇 STANDARD摇 DESIGN Jul. 2016 文章编号:1004 2954(2016)07 0094 05 活性粉末混凝土梁斜裂缝宽度影响参数探析 金凌志, 温摇 晴 (广西岩土力学与工程重点实验室,桂林理工大学,广西桂林摇 541004) 摘摇 要:为了分析剪跨比、配箍率、钢纤维体积率和纵筋率等不同参数对试验梁斜裂缝宽度的影响,进行4 组11根 HRB500级钢筋活性粉末混凝土简支梁的抗剪试验研究,并提出其最大斜裂缝宽度计算的建议公式。 研究结果表 明:剪跨比、钢纤维体积率、配箍率和纵筋率都对试验梁的斜裂缝宽度有一定的影响,剪跨比越小,试验梁的斜裂缝 宽度越小;配箍率、钢纤维含量和纵筋率越大,试验梁的斜裂缝宽度越小;其中钢纤维体积率的影响最为明显。 基 于普通钢筋混凝土梁斜裂缝宽度计算公式构建的修正公式,可为HRB500 级钢筋活性粉末混凝土简支梁的抗剪计 算提供些许参考。 关键词:HRB500; 活性粉末混凝土梁; 影响参数; 斜裂缝宽度 中图分类号:U444摇 摇 文献标识码:A摇 摇 DOI:10.13238/ j.issn.1004-2954.2016.07.022 Research on Parameters Influencing Crack Width of Reactive Powder Concrete Beam JIN Ling鄄zhi,WEN Qing (Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering College of Civil Engineering and Architecture, Guilin University of Technology,Guilin541004,China) Abstract:In order to analyze the influence of different parameters,such as shear span ratio,stirrup ratio,steel fiber volume ratio and longitudinal reinforcement ratio on the shear crack width of the test beam,shear tests of 4 groups of 11 HRB500 grade reinforced concrete simply supported beams are studied,and the proposed formula for calculating the width of the maximum shear crack is put forward. The research results show that shear span ratio,stirrup ratio,steel fiber volume ratio and longitudinal reinforcement ratio all have certain effects on the shear crack width of the beam. The smaller the shear span ratio,the smaller the shear crack width of the test beam. The bigger the stirrup ratio,steel fiber volume