FRP筋锚杆锚具的有限元参数化设计

Analysis of Mechanical Behavior of Bolts Anchorages for FRP Tendon

在岩土工程中通常采用锚固技术来提高岩土体自身的强度和稳定性。钢锚杆几乎应用于土木建筑领域的各个方面,并且应用领域日益扩大,然而由于其防腐性能差、自重大、运输安装困难等缺陷在一定程度上制约了它的应用,尤其是钢锚杆的腐蚀问题,不仅影响结构的耐久性,严重时还会出现重大工程事故。纤维增强塑料筋锚杆为锚固技术在岩土工程中的应用开辟了更为广阔的前景。针对施工中常用的钢套粘结式锚固系统,采用有限元软件ANSYS建立模型,分析了在正常使用状态下,锚固系统各组件之间界面上的应力分布,同时还对影响锚固性能的几个关键因素进行探讨,为此类锚固系统的设计、计算以及其它形式粘结型锚具的设计、分析、优化提供参考。

The strength and stability of rock-soil mass are improved by anchoring technology in geotechnical engineering.Steel bolt is hardly applied to all aspects of civil and architecture field,and the application field is expanding day by day.However,because of poor anti-corrosive prosperities,heavy self weight,difficult to transportation and installation,etc.which restricts their application in some extent,especially the corrosion problem of steel bolt not only affects the durability of structure but also leads to great engineering accidents.FRP tendon opens a better prospect to anchoring technology in geotechnical engineering.Aim at the common bond anchoring system of steel sleeve,the finite element method is used to build the models,analyzes the stress distributions between each component under normal service condition,and studies several key factors affected the anchorage performance.The study of this thesis can provide a reference for the design and calculation of this anchoring system and other bond-type anchorages.