碳纤维筋束多级锥体锚具的设计和试验研究  

DESIGN AND EXPERIMENTAL STUDY OF MULTI-CONE ANCHORAGES FOR CARBON FIBER TENDONS

作　　者：朱万旭[1,2] 杨龙 朱世聪 黄宗宁 ZHU Wanxu;YANG Long;ZHU Shicong;HUANG Zongning(College of Civil and Architectural Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Geomechanics and Engineering,Guilin 541004,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]广西岩土力学与工程重点实验室,广西桂林541004

出　　处：《工业建筑》2020年第8期177-181,共5页Industrial Construction

基　　金：国家重点研发计划资助项目(2017YFC0703007)。

摘　　要：鉴于现有纤维筋锚具外型尺寸大而不利于工程应用的现状,提出一种新型多级锥体锚固结构,其外径小,且多级锥体可调节筋束的挤压应力,消减受荷端挤压应力集中。通过对多级锥体锚具开展静载拉伸试验,验证其有效性,对试验现象、锚固效率系数、筋束受荷端受到的挤压情况进行分析。结果表明:多锥体锚固结构均未发生滑脱现象,锚固效率系数达到90%以上,满足了拉索锚具设计标准的要求;锚具外周环向应力可反映内部筋束受到的径向挤压应力,两个内锥环向应力相差不大,说明新型锚具可有效减小筋材在锚具前端的挤压应力集中。Due to the large size of the existing fiber reinforced anchorage is not conducive to engineering application,a new type of multi-cone anchorage structure was proposed.Its outer diameter is small,and the extrusion stress of multi-cone adjustable tendons can reduce the extrusion stress concentration at the loading end.Static tension tests were carried out to verify the effectiveness of the multi-cone anchorage.The experimental phenomena,anchorage efficiency coefficient and the extrusion stress at the loading end of the tendon were analyzed.The results showed that no slippage occurred in the multi-cone anchorage structure,and the anchorage efficiency coefficient reached more than 90%,which met the requirements of the cable anchorage design standard;the circumferential stress of the anchorage could reflect the radial extrusion stress of the internal tendons,and the difference between the circumferential stress of the two inner cones was not significant,which indicated that the new anchorage could effectively reduce the extrusion stress concentration of the tendons at the loading end of the anchorage.

关 键 词：桥梁工程 锚具 受力分析 碳纤维复合材料 效率系数 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]