预应力碳纤维板夹片式锚具的设计与优化

发布时间：2018-03-06 09:04

本文选题：碳纤维板　切入点：夹片式锚具　出处：《广西科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：预应力碳纤维板加固混凝土结构技术作为一种主动加固方法,是当前比较先进的混凝土结构加固技术;同时,预应力碳纤维板加固技术的优势明显,在实际工程中的应用前景十分广阔。目前,国内关于预应碳纤维板加固混凝土结构方面的研究工作才刚刚开始,对预应力碳纤维板加固混凝土结构技术的研究具有重要的社会效益和巨大的经济效益。其中,预应力碳纤维板夹片式锚具是保证预应力碳纤维板加固效果的一项关键环节,通过对预应力碳纤维板夹片式锚具展开深入的研究,设计和优化出一款安全的、适用的、稳定的预应力碳纤维板夹片式锚具,可以有效地推动预应力碳纤维板加固技术在实际工程中的推广和应用。因此,本文主要从以下几个方面对预应力碳纤维板夹片式锚具展开研究:(1)预应力碳纤维板夹片式锚具的锚固原理;预应力碳纤维板夹片式锚具锚固过程中预紧组装阶段的受力分析、预紧卸载阶段的受力分析以及张拉锚固阶段的受力分析;预应力碳纤维夹片式锚具中锚板和楔形夹片的尺寸设计研究。(2)运用有限元分析软件ANSYS建立适用的预应力碳纤维板夹片式锚具组装件的有限元分析模型,并进行有限元分析;研究预应力碳纤维板夹片式锚具组装件整体、锚板、楔形夹片以及碳纤维板的有限元分析结果,确定预应力碳纤维板夹片式锚具组装件在锚固状态下各部分的应力分布和变形情况。(3)研究利用性价比更优的球墨铸铁替代目前广泛使用的40Cr制造锚板;对预应力碳纤维板夹片式锚具的倾角角度差进行优化,确定最合适的角度差;优化楔形夹片的顶面形式,将楔形夹片的顶面形式由平面形式优化为弧面形式。通过以上研究工作可以有助于理解预应力碳纤维板夹片式锚具的工作机理和受力特点,为设计和优化预应力碳纤维板夹片式锚具提出了新的思路和方法,提高预应力碳纤维板夹片式锚具的锚固效率,有效地促进预应力碳纤维板加固混凝土结构技术在实际工程中的推广和应用。
[Abstract]:As a kind of active strengthening method, prestressed carbon fiber slab (PC CFRP) is an advanced reinforcement technique for concrete structure, and the prestressing carbon fiber slab (PC CFRP) has obvious advantages in strengthening concrete structure. The application prospect in practical engineering is very broad. At present, the domestic research work on strengthening concrete structure with preloaded carbon fiber sheet is just beginning. The study of prestressed carbon fiber reinforced concrete structure technology has important social benefits and great economic benefits, among which, the prestressed carbon fiber sheet sandwich Anchorage is a key link to ensure the reinforcement effect of prestressed carbon fiber slab. Through the deep research on the prestressed carbon fiber sheet anchors, a safe, applicable and stable prestressed carbon fiber sheet Anchorage is designed and optimized. It can effectively promote the popularization and application of prestressed carbon fiber slab strengthening technology in practical engineering. In this paper, the Anchorage principle of Prestressed carbon Fiber Plate clamped Anchorage is studied from the following aspects: 1) the Anchorage principle of Prestressed carbon Fiber Plate clamped Anchorage, and the stress analysis of pretightening assembly stage during the anchoring process of Prestressed carbon Fiber Plate clip Anchorage. The stress analysis of preloading and unloading stage and the stress analysis of tension and Anchorage stage; Research on the size Design of Anchorage Plate and Wedge clamp in Prestressed carbon Fiber reinforced Anchorage. The finite element analysis software ANSYS is used to establish the finite element analysis model of prestressed carbon fiber sheet anchor assembly, and the finite element analysis is carried out. The finite element analysis results of prestressing carbon fiber sheet clamped Anchorage assembly, anchor plate, wedge clamp and carbon fiber plate are studied. The stress distribution and deformation of various parts of prestressed carbon fiber reinforced concrete (CFRP) clamped Anchorage assembly under anchoring condition were determined. The ductile iron with better performance and price ratio was used to replace 40Cr to make anchor plate. The inclination angle difference of prestressed carbon fiber sheet clamped Anchorage is optimized to determine the most suitable angle difference, and the top surface form of wedge clamp is optimized. The top surface form of wedge-shaped clamp is optimized from plane form to arc form. The above research can be helpful to understand the working mechanism and mechanical characteristics of prestressed carbon fiber sheet clamped Anchorage. In order to design and optimize the prestressed carbon fiber sheet anchors, a new idea and method are put forward to improve the anchoring efficiency of the prestressed carbon fiber sheet anchors. It can effectively promote the application of prestressed carbon fiber reinforced concrete strengthening technology in practical engineering.
【学位授予单位】：广西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU757.2

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