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对9根500 MPa级细晶粒钢筋混凝土偏压柱及1根HRB400钢筋混凝土偏压柱进行对比试验,观察试件的裂缝发展过程和破坏形态。对500 MPa级细晶粒钢筋混凝土偏压构件裂缝宽度间距的实测值及现行规范公式计算值的比较表明,实测值小于按规范公式计算值,满足规范要求,但规范公式计算结果偏大;偏压构件裂缝宽度小于受弯构件,构件受力状态对裂缝宽度产生影响;由建议公式计算结果表明,偏压构件与受弯构件裂缝宽度计算具有相同的可靠度。
Nine 500 MPa fine grain reinforced concrete columns and one HRB400 reinforced concrete column were compared to observe the fracture development process and failure mode of the specimens. The comparison between the measured value of the crack width and the calculated value of the current standard formula for the 500 MPa fine grain reinforced concrete biasing member shows that the measured value is less than the value calculated according to the standard formula and meets the specifications but the calculated result of the standard formula is too large. The crack width of the compression member is smaller than that of the flexural member, and the stress state of the member affects the width of the crack. The calculation results of the proposed formula show that the reliability of the crack width of the bias member and the flexural member has the same reliability.