ECC-NC气泡膜式接合面劈裂抗拉性能试验研究  

Experimental Research on Splitting Tensile Properties of ECC⁃NC Bubble Groove Interface

作　　者：徐士明 邢彪 于泽 管东芝[3] 彭占辉 XU Shiming;XING Biao;YU Ze;GUAN Dongzhi;PENG Zhanhui(China Tiegong Investment&Construction Group Co.,Ltd.,Beijing 101300,China;China Railway Tiegong City Construction Co.,Ltd.,Jinan,Shandong 250000,China;School of Civil Engineering,Southeast University,Nanjing,Jiangsu 211189,China)

机构地区：[1]中国铁工投资建设集团有限公司,北京101300 [2]中铁铁工城市建设有限公司,山东济南250000 [3]东南大学土木工程学院,江苏南京211189

出　　处：《施工技术（中英文）》2024年第20期149-153,158,共6页Construction Technology

基　　金：国家自然科学基金(52278154);江苏省自然科学基金(BK20231429)。

摘　　要：由于水泥基复合材料(ECC)具有多重开裂与应变硬化等特性,其与普通混凝土(NC)组合成的ECC-NC组合结构具有广泛的应用前景。开展系列劈裂抗拉试验,研究ECC-NC气泡膜式接合面劈裂抗拉性能,分析浇筑顺序、混凝土强度等级等因素对接合面抗拉性能的影响。试验结果表明,混凝土强度等级与接合面劈裂抗拉强度有较强相关性,且浇筑顺序对接合面劈裂抗拉性能的影响不可忽略。同时,提出了先浇NC-后浇ECC气泡膜式接合面劈裂抗拉强度计算公式。Due to the multiple-cracking and strain-hardening properties of engineered cementitious composites(ECC),the combination of ECC and normal concrete(NC)to form ECC-NC composite structures shows great application prospects.A series of splitting tensile tests were carried out,the splitting tensile properties of ECC-NC bubble groove interface were mainly investigated,and the effects of the casting sequence,concrete strength grade on the tensile properties of the interface were also researched.The test results showed that there was a strong correlation between the concrete strength grade and the splitting tensile strength of the interface,and the influence of casting sequence on the splitting tensile properties of interface was not negligible.Simultaneously,the formula for calculating the splitting tensile strength of bubble groove interfaces between precast NC and post-cast ECC was proposed.

关 键 词：水泥基复合材料 混凝土 气泡膜式接合面 劈裂抗拉性能 试验 

分 类 号：TU528[建筑科学—建筑技术科学]