玻璃纤维增强聚丙烯树脂复合材料索锚构件设计及力学性能  

Design and mechanical properties of glass fiber reinforced polypropylene polymer composite cable-anchor component

作　　者：李承高[1,2] 张玉潭 呼思乐 吉启康 郭正岳 孙瑜泽 咸贵军 LI Chenggao;ZHANG Yutan;HU Sile;JI Qikang;GUO Zhengyue;SUN Yuze;XIAN Guijun(Key Lab of Structures Dynamic Behavior and Control,Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《复合材料学报》2022年第11期5098-5108,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(52008137);黑龙江省自然科学基金(LH2021E073)。

摘　　要：桥梁拉索及预应力混凝土结构用纤维增强复合材料的可靠锚固是需要解决的关键难题。热塑性聚丙烯树脂具有优异的断裂韧性、耐湿热/抗疲劳性能及加工成型方便和可回收利用等优点,根据其加热熔化冷却成型原理,本文采用玻璃纤维增强聚丙烯预浸带制备了一种尺寸稳定、性能优异、具有自锁结构的复合材料索锚构件。采用拉伸测试及有限元模拟研究预浸带层数与圆弧段角度对索锚结构极限承载力、应力分布及破坏模式的影响。研究发现,索锚构件的极限承载力随圆弧段角度增加而降低,随缠绕层增加先增加后下降。有限元模拟与实验结果吻合性较好,验证了缠绕10层预浸带,圆弧段角度为13.5°的索锚构件应力分布均匀并取得最高的拉伸强度。最后,通过总结与分析,论证了一体化新型索锚构件在桥梁拉索、地锚结构及预应力混凝土结构中的应用前景。The reliable anchoring of fiber reinforced polymer composite used in bridge cable and prestressed concrete structures is the key problem to be solved.The thermoplastic polypropylene resin has the excellent fracture toughness,hygrothermal/fatigue resistances,convenient processing and recycling,etc.Based on the heating melting cooling molding principle of thermoplastic resin,a kind of composite cable-anchor with stable size,excellent performance and self-locking structure was prepared through adopting the glass fiber reinforced polypropylene prepreg tape.The effects of prepreg tape winding layer number and arc angle on the ultimate bearing capacity,stress distribution and failure mode of cable-anchor structure were studied by tensile test and finite element simulation.It is found that the ultimate bearing capacity of cable-anchor component decreases with the increase of the arc angle,and increases firstly and then decreases with the increase of the winding layer.The finite element simulation is in good agreement with the experimental results,which verifies that the stress distribution of cableanchor component of 10-layer prepreg tape with the arc angle of 13.5°is uniform and the optimum tensile properties were obtained.Finally,by summarizing and analyzing,the application prospects of the new integrated cableanchor components in bridge cable,ground anchor structure and prestressed concrete structure were demonstrated.

关 键 词：玻璃纤维 热塑性聚丙烯树脂 预浸带 索锚构件 拉伸性能 有限元模拟 应用前景分析 

分 类 号：TB332[一般工业技术—材料科学与工程]