钢纤维对高强陶粒混凝土阻裂效应试验研究--基于纯扭作用  

Experimental study on the crack resistance effect of steel fiber on high strength ceramsite concrete--Based on pure torsion

作　　者：李建锵 LI Jianqiang(Fujian Boyi Design Co Ltd,Quanzhou 362000)

机构地区：[1]福建省博意设计有限公司,福建泉州362000

出　　处：《福建建筑》2020年第5期82-87,共6页Fujian Architecture & Construction

摘　　要：当前,钢纤维高强陶粒混凝土的理论研究正处于起步阶段,其物理力学性能缺乏具体的试验数据。基于此,为工程实际应用提供试验依据和理论基础,对8根不同钢纤维体积率和配筋率的钢纤维高强陶粒混凝土梁和1根不含钢纤维的陶粒混凝土梁及1根普通混凝土梁进行了受扭试验。加载方式为一端固定、另一端施加平面外扭矩,中间部分形成纯扭段,采用力传感器控制手动螺旋式千斤顶施加扭矩,并通过实验取得开裂扭矩、裂缝宽度、混凝土应变等数据;然后,分析所得数据,探讨钢纤维高强陶粒混凝土中钢纤维对于防止扭转荷载下裂缝发展的效应,并得出钢纤维能提高陶粒混凝土的抗扭转开裂性能等结论。At present,the research of steel fiber high strength ceramsite concrete is still at the initial stage,physical and mechanical properties lack of concrete test data. Based on this,it provides experimental basis and theoretical basis for practical application of engineering. Torsion tests were carried out on eight steel fiber high strength ceramsite concrete beams with different bulk and reinforcement ratios,one concrete beam without steel fiber and one ordinary concrete beam. The loading method is to fix one end and apply out-of-plane torque to the other end,the middle part forms a pure torsional segment,A force sensor is used to control the torque applied to the manual screw jack. The data of cracking torque,crack width and concrete strain were obtained through the test. Then,by analyzing the data,the effect of steel fiber on preventing crack development under torsional load in steel fiber high-strength ceramsite concrete is discussed,and the conclusion that steel fiber can improve the anti-torsional cracking performance of ceramsite concrete is obtained.

关 键 词：陶粒轻骨料 钢纤维 混凝土 抗扭性能 开裂扭矩 

分 类 号：TU528[建筑科学—建筑技术科学]