再生混凝土梁极限状态计算方法及可靠度研究
发布时间：2018-09-09 10:44
【摘要】：随着我国城市化高速进展，建筑垃圾的处理以及建筑原材料匮乏已经成为当前影响国计民生的重要问题。而再生混凝土及其结构的适时提出一方面消化了大量建筑垃圾同时解决了建筑原材料短缺的问题，是真正的环境友好型建筑材料。但目前再生混凝土及其结构的设计方法还不完善，尤其是再生混凝土基本构件可靠度分析等问题亟待解决，使得再生混凝土技术无法在实际工程中广泛推广。本文在收集国内相关研究成果结合本课题组试验资料的基础上，对再生混凝土梁正截面受弯承载力极限状态和正常使用极限状态最大裂缝宽度、挠度计算方法进行了系统分析，并提出了相关计算公式，进而采用验算点法（JC法），对其承载力、正常使用极限状态可靠度进行重点分析，提出了可靠性评价与建议。论文主要工作如下： （1）统计和分析包含本课题组完成的再生混凝土梁受弯试验数据，修正《混凝土结构设计规范》(GB50010-2010)中梁正截面受弯承载力和正常使用阶段最大裂缝宽度、挠度计算公式，确定了再生混凝土梁相关建议公式。 （2）在本文建议公式的基础上，，分析再生混凝土梁正截面受弯承载力极限状态可靠度，研究不同参数对可靠度指标的影响。分析结果表明，用本文建议公式计算再生混凝土梁正截面受弯承载力，其可靠度指标符合我国《建筑结构可靠度设计统一标准》（GB50068-2001）中规定的目标可靠度指标。不同参数对可靠度影响程度不同，在实际工程设计时应综合考虑。 （3）在本文建议公式的基础上，分析再生混凝土梁正常使用极限状态最大裂缝宽度和挠度可靠度。分析结果表明，用本文建议公式计算再生混凝土梁正常使用阶段最大裂缝宽度和挠度，其可靠度指标基本符合我国《建筑结构可靠度设计统一标准》（GB50068-2001）中规定的目标可靠度指标。不同参数对可靠度影响程度不同，在实际工程设计时应综合考虑。
[Abstract]:With the rapid development of urbanization in China, the disposal of construction waste and the shortage of construction raw materials have become an important problem affecting the national economy and people's livelihood. On the one hand, the recycled concrete and its structure have digested a large amount of construction waste and solved the problem of shortage of construction raw materials. It is a real environment-friendly building material. However, the design method of recycled concrete and its structure is not perfect, especially the reliability analysis of the basic components of recycled concrete is urgently needed to be solved, which makes the recycled concrete technology can not be widely used in practical engineering. On the basis of collecting relevant domestic research results and the experimental data of our group, this paper makes a systematic analysis of the maximum crack width and deflection calculation method for the flexural bearing capacity of the normal section of recycled concrete beams and the maximum crack width and deflection under the normal service limit state. The related calculation formula is put forward, and then the JC method is used to analyze the bearing capacity and the reliability of the limit state in normal use. Finally, the reliability evaluation and suggestions are put forward. The main work of this paper is as follows: (1) Statistics and analysis include the bending test data of recycled concrete beams completed by our research group. The formula for calculating the flexural bearing capacity of normal section and the maximum crack width and deflection in normal service stage of beams in GB50010-2010 has been revised, and the relevant suggested formulas for recycled concrete beams have been determined. (2) based on the formulas suggested in this paper, The ultimate state reliability of flexural bearing capacity of normal section of recycled concrete beam is analyzed and the influence of different parameters on reliability index is studied. The analysis results show that the flexural bearing capacity of the normal section of recycled concrete beams is calculated by the formula proposed in this paper, and its reliability index is in line with the target reliability index stipulated in the Unified Standard for Reliability Design of Building structures (GB50068-2001) in China. Different parameters have different influence on reliability, which should be considered in practical engineering design. (3) on the basis of the formula suggested in this paper, the maximum crack width and deflection reliability of recycled concrete beams under normal service limit state are analyzed. The analysis results show that the maximum crack width and deflection of recycled concrete beams are calculated by the formula proposed in this paper, and the reliability index basically accords with the target reliability index stipulated in the Unified Standard for Reliability Design of Building structures (GB50068-2001) in China. The influence of different parameters on reliability is different and should be considered comprehensively in practical engineering design.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.1
本文编号：2232155
[Abstract]:With the rapid development of urbanization in China, the disposal of construction waste and the shortage of construction raw materials have become an important problem affecting the national economy and people's livelihood. On the one hand, the recycled concrete and its structure have digested a large amount of construction waste and solved the problem of shortage of construction raw materials. It is a real environment-friendly building material. However, the design method of recycled concrete and its structure is not perfect, especially the reliability analysis of the basic components of recycled concrete is urgently needed to be solved, which makes the recycled concrete technology can not be widely used in practical engineering. On the basis of collecting relevant domestic research results and the experimental data of our group, this paper makes a systematic analysis of the maximum crack width and deflection calculation method for the flexural bearing capacity of the normal section of recycled concrete beams and the maximum crack width and deflection under the normal service limit state. The related calculation formula is put forward, and then the JC method is used to analyze the bearing capacity and the reliability of the limit state in normal use. Finally, the reliability evaluation and suggestions are put forward. The main work of this paper is as follows: (1) Statistics and analysis include the bending test data of recycled concrete beams completed by our research group. The formula for calculating the flexural bearing capacity of normal section and the maximum crack width and deflection in normal service stage of beams in GB50010-2010 has been revised, and the relevant suggested formulas for recycled concrete beams have been determined. (2) based on the formulas suggested in this paper, The ultimate state reliability of flexural bearing capacity of normal section of recycled concrete beam is analyzed and the influence of different parameters on reliability index is studied. The analysis results show that the flexural bearing capacity of the normal section of recycled concrete beams is calculated by the formula proposed in this paper, and its reliability index is in line with the target reliability index stipulated in the Unified Standard for Reliability Design of Building structures (GB50068-2001) in China. Different parameters have different influence on reliability, which should be considered in practical engineering design. (3) on the basis of the formula suggested in this paper, the maximum crack width and deflection reliability of recycled concrete beams under normal service limit state are analyzed. The analysis results show that the maximum crack width and deflection of recycled concrete beams are calculated by the formula proposed in this paper, and the reliability index basically accords with the target reliability index stipulated in the Unified Standard for Reliability Design of Building structures (GB50068-2001) in China. The influence of different parameters on reliability is different and should be considered comprehensively in practical engineering design.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.1
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