新型碳纤维板锚具设计及试验研究

Design and Experimental Research of New Type of Carbon Fiber Plate Anchorage

针对传统碳纤维增强复合材料(carbon fiber reinforced plastic,CFRP)板锚具易出现滑脱、劈裂等现象,螺栓提供的预紧力大小难以控制的问题,对传统锚具的结构形式做出改进。通过理论分析新型锚具的受力机理,为新型锚具的结构尺寸设计提供理论依据。利用有限元软件对不同参数CFRP板锚具进行受力模拟,得出锚具设计尺寸进行试验研究。研究结果表明:当夹板横向两侧位移为0.65 mm时,锚具的最大锚固效率为89.37%,CFRP板发生爆炸式破坏;锚具夹板内曲面式设计可通过控制夹板位移有效控制预紧力大小,增强挤压效果。

Since traditional carbon fiber reinforced plastic(CFRP)plate anchors are prone to slippage and splitting,and the pre-tightening force provided by bolts is difficult to control,the structure of traditional anchors needs to be improved.With theoretical analysis of the force mechanism of the new anchorage,the theoretical for the design of structural size of the anchorage was provided.A finite element software was used to simulate the forces on CFRP plate anchors under different parameters,and the design dimensions of the anchors were obtained for experimental research.The research results show that when the lateral displacement of the splint is 0.65 mm,the maximum anchoring efficiency of the anchor is 89.37%,and the CFRP plate is explosively destroyed.The research also demonstrates that the pre-tightening force can be controlled by the inner curved design of the anchor splint because of the displacement of the splint.The extrusion effect can be enhanced because of the curved design.