弯剪共同作用下活性粉末混凝土梁截面分析程序探讨

发布时间：2018-06-02 01:32

本文选题：活性粉末混凝土 + HRB级箍筋　；参考：《科学技术与工程》2016年36期

【摘要】：为了研究配箍率对高强箍筋活性粉末混凝土(RPC)梁抗剪性能的影响,开展6根配置HRB400级箍筋RPC梁的抗剪试验。考虑RPC的材料特征参数与钢纤维对斜截面承载力的影响,分析有腹筋与无腹筋梁在剪力传递机理及裂缝控制方面的差异。基于修正压力场理论,对开裂后的混凝土在拉、压应力下的本构关系及裂缝处的应力平衡条件进行适当修正;将弯矩效应叠加至纯剪作用下的截面分析中建立RPC梁在弯剪复合作用下的分析模型,并采用MATLAB软件编制RPC梁斜截面抗剪强度分析计算程序;对RPC简支梁的试验结果与计算结果进行对比分析。研究结果表明该计算程序能够较好地预测高强钢筋RPC梁的受剪承载力,具有一定的参考和实用价值。
[Abstract]:In order to study the effect of hoop ratio on shear resistance of high strength stirrups reinforced reactive powder concrete (RPC) beams, the shear tests of six RPC beams with HRB400 grade stirrups were carried out. Considering the influence of the material characteristic parameters of RPC and steel fiber on the bearing capacity of oblique section, the difference of shear force transfer mechanism and crack control between web-reinforced and non-web-reinforced beams is analyzed. Based on the theory of modified pressure field, the constitutive relation of cracked concrete under tensile and compressive stress and the stress balance condition at crack are modified properly. The bending moment effect is superimposed on the section analysis under pure shear action to establish the analysis model of RPC beam under the compound action of bending and shear, and the software MATLAB is used to compile the calculation program for the shear strength of the RPC beam in oblique section. The test results and calculation results of RPC simply supported beams are compared and analyzed. The results show that the calculation program can predict the shear capacity of high strength reinforced RPC beams, and it has certain reference and practical value.
【作者单位】：桂林理工大学广西岩土力学与工程重点实验室土木与建筑工程学院;
【基金】：国家自然科学基金(51368013) 广西重点实验室(2015-A-02)资助
【分类号】：TU37

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