BFRP筋材与水泥基材料粘结性能及极限拉拔力试验研究

发布时间：2018-04-05 19:07

本文选题：BFRP筋材　切入点：粘结性能　出处：《四川建筑科学研究》2017年01期

【摘要】：用68个中心拉拔试件试验研究了不同直径BFRP筋材与水泥基材料的粘结性能,并进行了2组多束BFRP筋材锚杆现场拉拔试验。试验结果表明,BFRP筋材与砂浆粘结强度一般大于4.5 MPa,锚杆设计时,BFRP筋材锚杆与砂浆的粘结强度标准值可取4.0 MPa,设计值可取2.0 MPa。多束BFRP筋材组成锚杆时,平均单根锚杆极限抗拔力约为筋材极限抗拔力的77.3%~82.1%。采用BFRP筋材替代钢筋锚杆,可根据极限抗拔力,按等强度替代原则进行设计。试验结果为BFRP锚杆设计提供了必要的参数。
[Abstract]:The bond properties between BFRP bars with different diameters and cement-based materials were studied with 68 central drawing specimens, and two groups of field drawing tests of multi-beam BFRP bars were carried out.The experimental results show that the bond strength between BFRP bar and mortar is generally greater than 4.5 MPA, and the standard value of bond strength between BFRP bar and mortar is 4.0 MPA and 2.0 MPa respectively.When multi-beam BFRP bars consist of anchors, the average ultimate pull-out strength of a single anchor rod is about 77.3% of the ultimate pull-out strength of the steel bar.Using BFRP bar instead of anchor bar can be designed according to the ultimate pull-out force and the principle of equal strength substitution.The test results provide necessary parameters for BFRP bolt design.
【作者单位】：西南交通大学地球科学与环境工程学院;广东省路桥建设发展有限公司;
【基金】：广东省交通运输厅科技项目(科技-2013-02-012)
【分类号】：TU528

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