耐蚀筋材高耐久性混凝土构件承载性能试验研究  

Experimental study on bearing capacity of high durability concrete memberswith corrosion resistant steel bars

作　　者：文波 张路[2,3] 牛荻涛 WEN Bo;ZHANG Lu;NIU Ditao(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China EarthquakeAdministration,Harbin 150088,China;School ofCivilEngineering,Xian University of Architecture and TechnologyXi'an 710055,China;Key Laboratory of Structural Engineering and Earthquake Resistance of Ministry ofEducationXi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150088 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《华中科技大学学报（自然科学版）》2023年第4期96-103,共8页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中国地震局工程力学研究所基本科研业务费专项资金资助项目(2020EEEVL0415);国家自然科学基金面上项目(52078415);陕西省教育厅协同创新中心资助项目(20JY034);陕西省国际合作项目(2022KW-36)。

摘　　要：针对南海的极端湿热环境导致普通钢筋混凝土经常出现耐久性问题,提出了耐蚀钢筋搭配高耐久性混凝土的方式以提高混凝土结构的力学性能及耐久性.采用静力加载试验研究了在不同种类筋材、混凝土类型条件下梁、柱试件的破坏模式.结果表明:环氧涂层钢筋高耐久性混凝土梁的破坏模式与普通钢筋混凝土梁基本相似,抗弯承载力为普通混凝土的113.20%;玻璃纤维增强聚合物(GFRP)筋高耐久性混凝土梁呈突发状破坏,且挠度、应变曲线明显发生改变.采用环氧涂层钢筋的高耐久性混凝土柱极限承载为普通构件的111.74%,且破坏后承载能力下降较缓,变形较好;GFRP筋高耐久性混凝土柱呈突发状破坏,破坏后承载能力瞬时下降为极限承载力的20%以下.因此,环氧涂层钢筋高耐久性混凝土构件的适用性更好.In response to the extreme humid and hot environment in the South China Sea,which often leads to durability problems in ordinary reinforced concrete,the way of matching corrosion-resistant reinforcement with highly durable concrete was proposed to improve the mechanical properties and durability of concrete structures.Static loading tests were used to study the failure modes of beam and column specimens under different types of reinforcement and concrete.Results show that the failure mode of the epoxy coated reinforced concrete beams with high durability is similar to that of ordinary reinforced concrete beams,and the bending capacity is 113.20%of that of ordinary concrete beams.The glass fiber reinforced polymer(GFRP)reinforced high durability concrete beams show sudden failure,and the deflection and strain curves change significantly.The ultimate bearing capacity of the epoxy coated reinforced high durability concrete column is 111.74%of that of the ordinary member,and the bearing capacity declines slowly after failure,and the deformation is better.The GFRP reinforced high durability concrete column show sudden failure,and the bearing capacity immediately decreases to less than 20%of the ultimate bearing capacity after failure.Therefore,the applicability of epoxy coated reinforced high durability concrete members are better.

关 键 词：高耐久性混凝土 耐蚀筋材 梁柱构件 破坏模式 承载性能 

分 类 号：TU375[建筑科学—结构工程]