【作者】 郑升宝；

【导师】 周志祥； 杨丽梅；

【作者基本信息】 重庆交通学院 ， 结构工程， 2003， 硕士

【摘要】 横张预应力混凝土技术是重庆交通学院首次提出并应用于实践的,目前已成功建成了红槽房、徐家沟等7座桥梁,取得了明显的经济效益和社会效益。为进一步完善横张预应力混凝土桥梁的理论体系,为《横张预应力混凝土桥梁设计规范》有关条文的制订提供试验数据和理论依据,本文根据试验针对横张预应力混凝土的斜截面性能,开展了如下研究工作;1、针对横张预应力混凝土梁的特点,拟定了斜截面抗剪试验方案,进行了试验梁的设计,完成了10片横张预应力混凝土梁的制作及张拉阶段的测试研究工作。2、开展了8片横张预应力混凝土试验梁斜截面抗剪试验,讨论了横张预应力混凝土梁斜截面抗裂及抗剪性能。3、研究了影响横张预应力混凝土梁斜截面抗裂强度的因素,在理论分析和对试验资料统计分析的基础上提出了横张预应力混凝土梁的斜截面开裂剪力公式,与试验结果相比较,符合程度良好。4、较深入地分析了横张预应力混凝土梁产生剪切破坏的机理,研究了影响斜截面抗剪强度的因素,通过对其影响因素分析,对横张预应力混凝土梁提出了形式统一的斜截面抗剪强度计算公式,与试验结果吻合较好。5、对后浇加劲隔板进行了受力分析,进一步优化了横张预应力混凝土梁的构造。更多还原

【Abstract】 The Vertically-Tensioned Prestressed Concrete(VTPC) beam has been successfully applied in Hongcaofang bridge and other 6 bridges, It has prominent social and economical benefits. To further improve theoretical system of VTPC beam, and offer tested data and theoretical ground for Code for Design of Vertically Tensioned Prestressed Concrete Bridges. Based on the test, the shear behavior of VTPC beam is explored in the paper in aspects as below:1. Planning the procedure of the shearing test and designing the beam specimens according to VTPC’s properties, manufacturing 10 VTPC beams, and conducting test and research during the tensioning process.2. Through the shearing test on the 8 beam specimens finding that the VTPC beams have good inclined-section performance.3. Studying the influental factors on the anti-crack strength of inclined-section of the beams. Based on the theoretical analysis and the statistics tested data, bring forward the VTPC beam formulae to calculate the inclined-section anti-crack strength, which fits the tested results satisfactorily.4. Analyzing the mechanism of the shearing failure of the VTPC beam, and studying the the influental factors on the beams’ ultimate shear strength of the inclined-section beam. putting forward formula to calculate the ultimate shear strength of inclined section beam.5. Optimizing the configuration of the VTPC beams.更多还原