FRP-螺栓联合加固技术锚固参数的研究

Study of the anchoring parameter for the hybrid bonding of FRP

为了明确机械锚固的各项参数指标,指导FRP-螺栓联合加固技术(hybrid bonded fiber reinforced polymer,HB-FRP)的设计和施工,通过室内试验研究了螺栓的锚固深度,提出螺栓最小锚固深度的计算公式与螺栓选择的要求;利用ANSYS计算软件,采用螺栓预紧单元及面对面的接触分析,模拟不同钢板尺寸和螺栓预紧力的条件下钢板和混凝土之间的接触压应力分布情况,对钢板尺寸和钢板类型的选择给出了指导性的设计方法。该研究为HB-FRP在桥梁加固维修中的应用提供了可靠的依据。

To define the norms of the special mechanical anchors and direct the design and the construction of hybrid bonded fiber reinforced polymer（ HB-FRP） ,the specimens were investigated in a drawing test program in order to study the anchor depth of screw bolts.The finite element analysis was conducted to simulate the contact compression stress on the basis of different sizes of steel plate and bolt prestress by the Pretension 179 element and compact pairs of ANSYS.On the basis of experiments,the formula for calculating anchor depth of screw bolts is put forward.A method was suggested to guide the designs and the choice of the steel plates on the basis of the finite element analysis.It contributes to direct the design and the construction of HB-FRP.