BFRP模壳—混凝土组合桥面板基本性能研究
发布时间：2018-10-10 17:32
【摘要】：纤维增强复合材料(FRP, Fiber Reinforced Polymer)具有轻质高强、耐腐蚀、耐疲劳等特点,能够改善和解决传统材料所引起的耐久性难题,被认为是实现高性能、长寿命的理想材料。但因其弹性模量低而导致结构变形大等原因在一些桥面板结构应用中受到限制,将FRP型材与混凝土两者组合使用可以弥补这一缺陷,既能发挥FRP耐腐蚀高抗拉强度的优势,又能发挥混凝土抗压性能的特点。但既有的FRP型材-混凝土组合桥面板结构存在型材用量多、截面利用率、组合连接件性能不足等问题。基于这一问题,为研发出抗变形能力高和组合性能优越的FRP-混凝土组合桥面板体系,本文将从以下几个方面开展了理论分析和试验研究工作：1、BFRP模壳-混凝土组合桥面板的模壳设计。对模壳的几何截面形式进行较为系统的研究分析,基于截面刚度最大化理论,借助有限元数值分析,确定了一定跨径下模壳截面最优几何形态;结合模壳截面形式、组合方式以及生产工艺对模壳组合连接件进行了深入的优化研究；在此基础上提出采用同源FRP材料提升模壳抗变形能力理念,并对自平衡预应力FRP模壳设计原理、制备方法以及步骤进行了系统的研究和阐述。2、BFRP模壳混凝土浇筑施工过程模拟试验。参考相关规范对上述优化设计的BFRP模壳和自平衡预应力模壳进行混凝土浇筑模拟试验,对模壳在施工状态下刚度和应力变化进行了监测和分析,验证了BFRP模壳在施工阶段作为模板使用的可行性,对比分析了预应力自平衡模壳相对于无预应力模壳刚度的提升情况。3、开展了7块不同参数的组合桥面板静力性能试验,对其破坏形态、极限承载力、荷载位移曲线、模壳应力应变、预应力板条应力应变等方面进行了较为系统的研究,对比分析了腹板有无波纹齿作为连接件、腹板波纹齿和粘砂混合连接与否、增强钢筋和抗剪钢筋的设置、模壳的性能(白平衡预应力模壳、无预应力模壳)对组合桥面板在正常使用阶段和承载能力极限状态下受力性能的影响。4、在分析国内外已有FRP-混凝土组合桥面板试验研究成果的基础上,参考钢-混组合结构推导建立了BFRP模壳-混凝土组合桥面板抗弯承载力、抗剪承载力及挠度、应力理论设计公式,建议公式计算结果与试验结果吻合较好。
[Abstract]:Fiber reinforced composite (FRP, Fiber Reinforced Polymer) has the characteristics of light and high strength, corrosion resistance and fatigue resistance, which can improve and solve the durability problem caused by traditional materials. It is considered to be an ideal material for achieving high performance and long life. However, due to the low elastic modulus, the large deformation of the structure is limited in some bridge deck structures. The combination of FRP profile and concrete can make up for this defect, which can bring into play the advantages of high tensile strength and corrosion resistance of FRP. It can also give play to the characteristics of concrete compressive performance. But there are many problems in the existing FRP profiled concrete composite deck slab structure, such as the large amount of the profile, the utilization ratio of the section, the performance of the composite joint, and so on. Based on this problem, in order to develop FRP- concrete composite deck system with high deformation resistance and superior composite performance, In this paper, theoretical analysis and experimental research are carried out in the following aspects: (1) the design of the shell of BFRP / concrete composite bridge deck slab. Based on the theory of maximum section stiffness and finite element numerical analysis, the optimum geometric shape of die shell section is determined under certain span. The combination mode and production process are used to optimize the die shell composite joint, and on the basis of this, the concept of improving the deformation resistance of die shell with homologous FRP material is put forward, and the design principle of self-balanced prestressed FRP die shell is discussed. The preparation method and steps are systematically studied and expounded. 2. Simulation test of concrete pouring process of BFRP mold shell. With reference to the relevant codes, the concrete pouring simulation tests of the BFRP shell and the self-balanced prestressed shell are carried out, and the stiffness and stress changes of the shell under construction condition are monitored and analyzed. The feasibility of using the BFRP shell as a formwork in the construction phase is verified. The stiffness of the prestressed self-balanced shell is compared with that of the unprestressed shell. 3. Seven static performance tests of composite deck slab with different parameters are carried out. The failure mode, ultimate bearing capacity, load-displacement curve, stress and strain of die shell, stress and strain of prestressed slab are studied systematically, and the corrugated teeth of web plate are compared and analyzed. Web corrugated teeth and sand mixed connection, reinforced steel bar and shear reinforcement, mold shell performance (White balance prestressed mold shell, The influence of unprestressed shell on the mechanical behavior of composite deck slabs under normal service stage and ultimate loading capacity. 4. Based on the analysis of the experimental results of FRP- concrete composite deck slabs at home and abroad, According to the derivation of steel-concrete composite structure, the formulas for the design of flexural bearing capacity, shear bearing capacity, deflection and stress of BFRP modular shell concrete composite deck slab are established. The calculated results of the proposed formula are in good agreement with the experimental results.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.31
本文编号：2262668
[Abstract]:Fiber reinforced composite (FRP, Fiber Reinforced Polymer) has the characteristics of light and high strength, corrosion resistance and fatigue resistance, which can improve and solve the durability problem caused by traditional materials. It is considered to be an ideal material for achieving high performance and long life. However, due to the low elastic modulus, the large deformation of the structure is limited in some bridge deck structures. The combination of FRP profile and concrete can make up for this defect, which can bring into play the advantages of high tensile strength and corrosion resistance of FRP. It can also give play to the characteristics of concrete compressive performance. But there are many problems in the existing FRP profiled concrete composite deck slab structure, such as the large amount of the profile, the utilization ratio of the section, the performance of the composite joint, and so on. Based on this problem, in order to develop FRP- concrete composite deck system with high deformation resistance and superior composite performance, In this paper, theoretical analysis and experimental research are carried out in the following aspects: (1) the design of the shell of BFRP / concrete composite bridge deck slab. Based on the theory of maximum section stiffness and finite element numerical analysis, the optimum geometric shape of die shell section is determined under certain span. The combination mode and production process are used to optimize the die shell composite joint, and on the basis of this, the concept of improving the deformation resistance of die shell with homologous FRP material is put forward, and the design principle of self-balanced prestressed FRP die shell is discussed. The preparation method and steps are systematically studied and expounded. 2. Simulation test of concrete pouring process of BFRP mold shell. With reference to the relevant codes, the concrete pouring simulation tests of the BFRP shell and the self-balanced prestressed shell are carried out, and the stiffness and stress changes of the shell under construction condition are monitored and analyzed. The feasibility of using the BFRP shell as a formwork in the construction phase is verified. The stiffness of the prestressed self-balanced shell is compared with that of the unprestressed shell. 3. Seven static performance tests of composite deck slab with different parameters are carried out. The failure mode, ultimate bearing capacity, load-displacement curve, stress and strain of die shell, stress and strain of prestressed slab are studied systematically, and the corrugated teeth of web plate are compared and analyzed. Web corrugated teeth and sand mixed connection, reinforced steel bar and shear reinforcement, mold shell performance (White balance prestressed mold shell, The influence of unprestressed shell on the mechanical behavior of composite deck slabs under normal service stage and ultimate loading capacity. 4. Based on the analysis of the experimental results of FRP- concrete composite deck slabs at home and abroad, According to the derivation of steel-concrete composite structure, the formulas for the design of flexural bearing capacity, shear bearing capacity, deflection and stress of BFRP modular shell concrete composite deck slab are established. The calculated results of the proposed formula are in good agreement with the experimental results.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.31
【相似文献】
相关期刊论文 前10条
1 段泽伟,肖凤山,牟维刚;建筑用模壳的研制及应用[J];低温建筑技术;2003年04期
2 薛刚;塑料模壳在建筑工程中的应用[J];山西建筑;2004年16期
3 王召新;教育部综合办公楼工程模壳应用技术[J];施工技术;2005年10期
4 张中军;;一次性无机玻璃钢模壳固定方法的改进[J];施工技术;2007年03期
5 戚卫东;周卫国;侯小龙;;塑料模壳支模体系的应用实例[J];浙江建筑;2007年09期
6 梁启钊;;塑料模壳在建筑工程上的应用[J];广州建筑;2007年05期
7 黄如生;;轻型模壳施工安装质量控制要点[J];山西建筑;2008年21期
8 王慧磊;;无机玻璃钢模壳免拆施工技术[J];山西建筑;2010年21期
9 刘向东;;浅析建筑模壳施工方案的编制[J];建设科技;2013年06期
10 刘向东;;一次性建筑模壳技术施工要点[J];建筑;2013年08期
相关会议论文 前2条
1 朱玉杰;朱效甲;刘念杰;张辉;;玻纤菱镁建筑模壳发展历程与技术成熟程度分析[A];2014年6月建筑科技与管理学术交流会论文集[C];2014年
2 姜卫国;王莉;刘鸣;侯凤华;楼琅洪;;1600～1620℃浇注温度下K441合金与模壳面层的界面反应[A];第十二届中国高温合金年会论文集[C];2011年
相关重要报纸文章 前4条
1 记者 李媛 通讯员 陈妍;成功采用玻璃钢模壳施工[N];建筑时报;2007年
2 陈妍;实施玻璃钢模壳施工[N];中国建设报;2007年
3 陈妍;北京城建成功采用玻璃钢模壳施工[N];中华建筑报;2007年
4 朱玉杰 朱效甲;菱镁建筑模壳技术难点的研究与解决措施[N];中国建材报;2009年
相关硕士学位论文 前1条
1 孙沈鹏;BFRP模壳—混凝土组合桥面板基本性能研究[D];东南大学;2015年
，本文编号：2262668
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2262668.html
