低周反复荷载作用下混杂纤维混凝土柱变形性能分析  

Deformation Performance Analysis of Hybrid Fiber Concrete Columns under Low Reversed Cyclic Loading

作　　者：徐蓉[1] 白建文 赵燕茹[4] 徐娜[4] XU Rong;BAI Jianwen;ZHAO Yanru;XU Na(School of Architectural Engineering and Surveying,Inner Mongolia Technical College of Construction,Hohhot 010070,China;College of Science,Inner Mongolia University of Technology,Hohhot 010051,China;Institute of Mining Technology,Inner Mongolia University of Technology,Hohhot 010051,China;School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古建筑职业技术学院建筑工程与测绘学院,呼和浩特010070 [2]内蒙古工业大学理学院,呼和浩特010051 [3]内蒙古工业大学矿业学院,呼和浩特010051 [4]内蒙古工业大学土木工程学院,呼和浩特010051

出　　处：《硅酸盐通报》2020年第11期3503-3509,共7页Bulletin of the Chinese Ceramic Society

基　　金：内蒙古自治区高等学校科学研究项目(NJZY18256);内蒙古自治区自然科学基金(2019LH05020);内蒙古工业大学科学研究项目(X201532)。

摘　　要：考虑钢纤维和聚丙烯纤维体积掺量的影响,设计了21根钢筋混凝土柱,通过低周反复荷载试验,研究分析了钢-聚丙烯混杂纤维混凝土柱在低周反复荷载下的荷载-应变关系。研究结果表明:掺入钢纤维对降低混凝土柱中钢筋应变的增长速度有显著作用;聚丙烯纤维及钢纤维混杂掺入后,使得混凝土内部应力得到分散,对混凝土裂缝的发展和应力传递起到了抑制作用,且混杂纤维的阻裂作用较单一钢纤维更显著。最后,利用ANSYS软件模拟相同条件下的低周反复荷载试验,得到钢筋的荷载-应变曲线与试验结果基本吻合。Considering the influences of volumetric content of steel fiber and polypropylene fiber,21 reinforced concrete columns were designed.Through low reversed cyclic loading tests,the load-strain relationship of concrete columns was studied and analyzed.The research results show that the addition of steel fiber has a significant effect on reducing the growth rate of steel strain in concrete columns.When polypropylene fiber and steel fiber are mixed,the internal stress of concrete is dispersed,it can inhibit the development of concrete crack and stress transfer.And the crack resistance of hybrid fiber is more significant than that of single doped steel fiber.Finally,using ANSYS software to simulate low reversed cyclic loading tests under the same conditions,the load-strain curve of the steel bar is basically consistent with the test results.

关 键 词：钢筋混凝土柱 低周反复荷载 混杂纤维 荷载-应变 有限元 

分 类 号：TU375[建筑科学—结构工程] TU502