摘要
超高韧性水泥基复合材料(Ultra High Toughness Cementitious Composites,简称UHTCC)是一种新型高性能纤维混凝土,具有卓越的韧性和优良的耐久性能,已被成功地应用于许多实际工程。当在该材料浇注的构件中配制加强钢筋时,除了各自基本的材料力学性能外,它们之间的粘结滑移本构关系也是获取正确可靠的结构力学响应所必需的基本参数。基于此,在对6个钢筋内贴片试件进行拉拔试验的基础上,通过实测的钢筋应变和端部滑移,分析了两者之间的粘结应力以及相对滑移沿锚固长度的分布规律,进而推导出沿锚固长度变化的粘结滑移本构关系和反映这种变化的位置函数,并建立考虑锚固位置的粘结滑移本构关系。
A kind of new high performance fiber reinforced concrete, Ultra High Toughness Cementitious Composites （abbreviated as UHTCC） which shows prominent toughness and superior durability, has been successfully applied in many practical projects. When the member made of UHTCC is reinforced by steel bar, except for the fundamental material mechanical properties of UHTCC and steel bar, bond-slip relationship between them also is a necessary basic parameter for obtaining an accurate and reliable analytical result. Because of this, pull-out tests of a total of six specimens are performed in this paper. In this test, along anchorage length of steel bar, a series of inner-embedded strain gauges are arranged at different positions. Based on measured steel bar strain and slip displacement at the free end of steel bar, the distribution of the bond stress and relative slip-displacement along the anchorage length of reinforcement bar are calculated. Then, the varying bond-slip relationship along anchorage length and the position functions reflecting the variation are deduced. Finally, the bond-slip relationship considering anchorage position is constructed.
出处
《工程力学》
EI
CSCD
北大核心
2008年第11期53-61,共9页
Engineering Mechanics
基金
南水北调工程建设重大关键技术研究及应用"南水北调工程超高韧性绿色ECC新型材料研究及应用"(JGZXJJ2006-13)
国家自然科学基金重点项目(50438010)
