钢丝网-喷射UHTCC薄板抗弯性能试验研究  

EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF STEEL WIRE-SPRAYED ULTRA HIGH TOUGHNESS CEMENTITIOUS COMPOSITES THIN PLATES

作　　者：穆富江 王激扬[1] 李伟平 徐世烺[1] MU Fu-jiang;WANG Ji-yang;LI Wei-ping;XU Shi-lang(Zhejiang University,College of Civil Engineering and Architecture,Hangzhou,Zhejiang 310058,China;Zhejiang Provincial Institute of Communications Planning,Design ＆ Research,Hangzhou,Zhejiang 310006,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]浙江省交通规划设计研究院,浙江杭州310006

出　　处：《工程力学》2018年第A01期338-343,共6页Engineering Mechanics

基　　金：国家自然科学基金面上项目(51578495);浙江省交通运输厅科研计划项目(2013H16);浙江省自然科学基金项目(LY16E080002)

摘　　要：喷射超高韧性水泥基复合材料(喷射UHTCC)具有显著的应变硬化和多缝开裂特性,但其抗拉和抗弯强度不高,因此工程中常常考虑与钢丝网组合使用。本文对喷射UHTCC、钢丝网喷射UHTCC和钢丝网复合砂浆的薄板试件分别进行了四点弯曲试验。其中,选取的钢丝网复合砂浆薄板直接拉伸的失稳破坏强度与喷射UHTCC薄板接近。试验表明,钢丝网喷射UHTCC薄板的抗弯强度和极限弯曲挠度分别比喷射UHTCC薄板提高了69.8%和59.0%,也比钢丝网复合砂浆薄板提高了3.9倍和73.3%。Sprayed Ultra high toughness cementitious composites（UHTCC） can be still characterized by stain-hardening and multiple fine crack opening properties, but its tensile and flexural strength are not high enough to fulfill the high tensile or flexural strength requests in the repair and retrofitting for some special structures. Thus, steel wire gauze was introduced to reinforce sprayed UHTCC. Four-points bending tests were carried on a kind of steel wire gauze reinforced fine grained concrete（SRC）, sprayed UHTCC（SU） and steel wire gauze reinforced sprayed UHTCC（SSU）, respectively, and this kind of SRC possesses comparable failure tensile strength to SSU. The tests results indicate that the steel wire gauze reinforced sprayed UHTCC（SSU） possess 69.8% higher flexural strength and 59.0% higher mid-span deflection than sprayed UHTCC, respectively. Moreover, SSU has a 3.9 times of flexural strength and 73.3% of ultimate flexural deflection higher than SRC.

关 键 词：超高韧性水泥基复合材料 钢丝网喷射UHTCC 钢丝网复合砂浆 四点弯曲试验 抗弯性能 

分 类 号：TU318[建筑科学—结构工程]