钢筋混凝土结构受剪承载力公式的可靠性研究-港口、海岸及近海工程专业论文.docxVIP

中文摘要本文介绍了钢筋混凝土结构斜截面受剪构件的抗剪机理及有关理论，深入 中文摘要 本文介绍了钢筋混凝土结构斜截面受剪构件的抗剪机理及有关理论，深入 分析了影响构件斜截面受剪承载力的若干个重要因素，并列出了我国及世界各主 要国家规范所规定的钢筋混凝土结构斜截面受剪承载力设计公式。 本文在介绍了有关可靠度方面的概念和理论后，对我国及世界几个主要国 家混凝土结构设计规范给出的钢筋混凝土构件斜截面受剪承载力设计公式进行 了可靠指标和失效概率的计算。通过对二百多个钢筋混凝土无腹筋矩形截面受剪 构件和一百多个有腹筋矩形截面受剪构件的试验数据的分析，得到了较精确的试 验回归公式，以此公式的计算值代替试验值，选定构件的有关参数后按《建筑结 构设计统一标准》中给出的“考虑基本变量概率分布类型的一次二阶矩法”计 算可靠指标芦及失效概率一，在此基础上比较分析了各国规范受剪承载力设计 公式的可靠度，并得到了一些相关的结论。 本文通过对理论模型和抗剪机理的分析来探讨其对各国规范受剪构件承载 力设计公式可靠度的影响，并且通过计算各国规范设计公式的可靠指标来评价我 国受剪设计公式目前在国际范围内的可靠性水平。因而本文工作可为今后修订 《混凝土结构设计规范》受剪承载力计算条文提供可靠度依据。 关键词：受剪承载力 可靠度分析 钢筋混凝土结构 可靠指标 ABSTRACTThis ABSTRACT This paper introduces the shear mechanism of shear-loading members in the oblique section for reinforced concrete structure and concerned theories．Then deeply analysis on some important factors influencing shear strength ofoblique section is made．At the same time shear strength formulas ofoblique section given by several main countries’Codes ofConcrete Structural Design are listed． After presenting concerned reliability concepts and theories，mliabitity index and failure probability computation on those formulas mentioned above is done．Through the experimental data analysis for over 200 shear—loading members without stirrup beam and more than 100 shear-loading members with ones．accurate regressing formulas are founded．Witll these formulas．substituting experimental data for calculated values and according to JC method in which the probability distribution type ofbasic variables is considered and which is given in Common Regulations For Structural Design reliability index 8 and failure probability P f is calculated after choosing several parameters of shear—loading members．In the addition,the reliability ofdesign formulas ofshear-loading members ofeach country’S Code ofConcrete Structure Design iS analyzed．At也e sfim_e time the related conclusion is got． Through the analysis of shear loading members shear mechanism and theories， those influences on reliability of shear-loading formulas can