超高性能有机纤维增强混凝土座椅板抗弯性能研究  

Experimental study on bending resistance of UHPOFRC seat panel

作　　者：孙强 屈雨浓 潘敏华 王奇 SUN Qiang;QU Yunong;PAN Minhua;WANG Qi(China Architecture Design and Research Group,Beijing 100044,China)

机构地区：[1]中国建筑设计研究院有限公司,北京100044

出　　处：《建筑结构》2022年第S01期1492-1495,共4页Building Structure

基　　金：中国建筑设计研究院有限公司科技创新项目(Y2020186)

摘　　要：为研究2种超高性能有机纤维增强混凝土(Ultra-High Performance Organic Fiber-Reinforced Concrete,UHPOFRC)座椅板在三分点加载线荷载下的抗弯性能,包含1块有配筋试件和1块无配筋试件。分析了UHPOFRC座椅板的受弯变形过程、荷载-挠度曲线和底板混凝土的荷载-应变曲线、裂缝分布。试验结果表明:有配筋UHPOFRC座椅板具有良好延性,但开裂荷载较小,破坏时板底出现多条贯通裂缝;无配筋UHPOFRC座椅板破坏形态表现为半脆性破坏,试件达到极限承载力时,跨中出现一条横向贯穿的主裂缝。随后承载力迅速下降为极限承载力的63%,破坏时板底仅出现1条贯通主裂缝。在设计UHPOFRC板的时候应配少量钢筋,以提高UHPOFRC板的延性。In order to study the flexural performance of two kinds of Ultra-High Performance Organic Fiber-Reinforced Concrete(UHPOFRC)seat panels under three-point loading line load,it includes 1 specimen with reinforcement and 1specimen without reinforcement.The bending deformation process,load-deflection curve of UHPOFRC seat panel and load-strain curve and crack distribution of bottom concrete are analyzed.The test results show that the reinforced UHPOFRC seat panel has good ductility,but the cracking load is small,and many through cracks appear at the bottom of the panel during failure.The failure mode of UHPOFRC seat panel without reinforcement is semi-brittle failure.When the specimen reaches the ultimate bearing capacity,a main transverse crack appears in the span.Then the bearing capacity rapidly decreased to 63%of the ultimate bearing capacity,and only one main crack appeared at the bottom of the panel.In the design of UHPOFRC board should be matched with a small amount of reinforcement,in order to improve the ductility of UHPOFRC board.

关 键 词：UHPOFRC 座椅板 抗弯性能 荷载-挠度曲线 

分 类 号：TU528[建筑科学—建筑技术科学]