中国混规与欧规2关于混凝土梁斜截面抗剪承载力计算的对比研究
发布时间：2018-08-07 15:38
【摘要】：钢筋混凝土梁抗剪机理复杂,影响因素众多,长期以来,各国学者对其进行了大量的研究,但至今钢筋混凝土梁的抗剪理论尚不完善,现行规范多数是半理论半经验或经验公式,尚无清晰的抗剪模型,适用性较差。因此,有必要对斜截面受剪承载力计算方法开展进一步的研究工作。本文首先对钢筋混凝凝土梁受剪承载力计算理论模型进行了综述并分析了各模型的优缺点,列出了多个抗剪模型,发现国内外目前对抗剪机理认识不足,理论模型多样化,相比之下桁架模型应用较为广泛,是抗剪理论模型发展的一个趋势。其次,本文分别对比分析了中国规范(GB50010-2010)、欧洲规范(EN1992-1-1：2004)中无腹筋和有腹筋钢筋混凝土梁斜截面受剪承载力计算方法,研究了混凝土强度、剪跨比、纵向钢筋配筋率和配箍率对斜截面抗剪承载力的影响。通过对比不同规范之间的计算结果的差异,对中、欧规范抗剪承载力的计算值进行了对比分析,并比较了各国最小和最大配箍率。结果表明,欧洲规范计算的受剪承载力较大,而中国规范的计算值比实际值偏低,偏于保守,相对来说也非常不经济,通过比较得出了中国规范存在的不足和以后改进的方向。
[Abstract]:The shear mechanism of reinforced concrete beams is complex and the influencing factors are numerous. For a long time, scholars from all over the world have done a lot of research on it, but the theory of shear resistance of reinforced concrete beams is not perfect. Most of the current codes are semi-theoretical and semi-empirical or empirical formulas, there is no clear shear model, the applicability is poor. Therefore, it is necessary to carry out further research on the calculation method of shear capacity of oblique section. In this paper, the theoretical model of shear bearing capacity of reinforced concrete beam is summarized, and the advantages and disadvantages of each model are analyzed, and several shear models are listed. It is found that there is a lack of understanding of shear resistance mechanism at home and abroad, and the theoretical models are diversified. Compared with the truss model, the truss model is widely used, which is a trend in the development of shear theory model. Secondly, the shear capacity of reinforced concrete beams without web reinforcement and reinforced concrete beams with web reinforcement in Chinese Code (GB50010-2010) and European Code (EN1992-1-1:2004) are compared and analyzed respectively, and the concrete strength and shear span ratio are studied. The influence of reinforcement ratio and hoop ratio on shear capacity of inclined section. By comparing the difference of calculation results between different codes, the calculated values of shear bearing capacity of Chinese and European codes are compared and analyzed, and the minimum and maximum hoop ratios of each country are compared. The results show that the shear capacity calculated by European code is larger than that calculated by Chinese code, while the calculated value of Chinese code is lower than the actual value, which is conservative and relatively uneconomical. Through comparison, the shortcomings of Chinese code and the direction of improvement in the future are obtained.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU375.1
本文编号：2170493
[Abstract]:The shear mechanism of reinforced concrete beams is complex and the influencing factors are numerous. For a long time, scholars from all over the world have done a lot of research on it, but the theory of shear resistance of reinforced concrete beams is not perfect. Most of the current codes are semi-theoretical and semi-empirical or empirical formulas, there is no clear shear model, the applicability is poor. Therefore, it is necessary to carry out further research on the calculation method of shear capacity of oblique section. In this paper, the theoretical model of shear bearing capacity of reinforced concrete beam is summarized, and the advantages and disadvantages of each model are analyzed, and several shear models are listed. It is found that there is a lack of understanding of shear resistance mechanism at home and abroad, and the theoretical models are diversified. Compared with the truss model, the truss model is widely used, which is a trend in the development of shear theory model. Secondly, the shear capacity of reinforced concrete beams without web reinforcement and reinforced concrete beams with web reinforcement in Chinese Code (GB50010-2010) and European Code (EN1992-1-1:2004) are compared and analyzed respectively, and the concrete strength and shear span ratio are studied. The influence of reinforcement ratio and hoop ratio on shear capacity of inclined section. By comparing the difference of calculation results between different codes, the calculated values of shear bearing capacity of Chinese and European codes are compared and analyzed, and the minimum and maximum hoop ratios of each country are compared. The results show that the shear capacity calculated by European code is larger than that calculated by Chinese code, while the calculated value of Chinese code is lower than the actual value, which is conservative and relatively uneconomical. Through comparison, the shortcomings of Chinese code and the direction of improvement in the future are obtained.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU375.1
【参考文献】
相关期刊论文 前2条
1 李凤兰;集中荷载钢筋混凝土有腹筋梁的受剪承载力[J];华北水利水电学院学报;1997年02期
2 钱国梁;陈小妹;李大庆;;受弯构件斜截面受剪承载力计算公式分析[J];武汉水利电力大学学报;1996年02期
，本文编号：2170493
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