建筑结构学报2025，Vol.46Issue(5)：153-163,254,12.DOI:10.14006/j.jzjgxb.2024.0167
SMA筋增强UHPC-ECC功能梯度梁受弯性能试验研究
Experimental study on flexural performance of UHPC-ECC functionally graded beam reinforced with ribbed SMA bars
摘要
Abstract
To improve the bearing capacity,energy dissipation capacity,and self-centering ability of structures while controlling crack development,this paper proposed a ribbed shape memory alloy(SMA)bar reinforced ultra-high performance concrete,engineered cementitious composite(UHPC-ECC)functionally graded beam with damage self-healing capabilities.To investigate the flexural performance and self-healing capabilities of the beams,three ribbed SMA bar reinforced ECC functionally graded beams and three reinforced concrete beams were tested under unidirectional low-cycle loading.The effects of concrete matrix type and longitudinal bar type on the flexural bearing capacity,hysteretic behavior,self-centering ability and crack width variation of the beam were studied and analyzed.A simple calculation model for functionally graded beams was derived and established based on a one-dimensional material constitutive model and specific calculation assumptions.The test results indicate that the ribbed SMA bar reinforced UHPC-ECC functionally graded beams exhibit superior bearing capacity,energy dissipation capacity,and self-centering ability compared to other test beams and maintain good crack control before failure.Using a composite of UHPC and ECC in the tensile zone of beams achieves effective self-centering and delays matrix crack development in functionally graded beams.The composite application of ribbed SMA bars and ECC in the tensile zone of the beam results in strain variation along the mid-span section height that conforms to the plane section assumption.The ribbed SMA bars have effective interaction with different concrete matrices,which can cooperate with the force and deformation.关键词
功能梯度梁/形状记忆合金/工程水泥基复合材料/超高性能混凝土/单向低周循环试验/受弯性能Key words
functionally graded beam/SMA/ECC/UHPC/unidirectional low cycle test/flexural performance分类
建筑与水利引用本文复制引用
钱辉,范迪荣,王翔宇,师亦飞,张雨晴..SMA筋增强UHPC-ECC功能梯度梁受弯性能试验研究[J].建筑结构学报,2025,46(5):153-163,254,12.基金项目
河南省高校科技创新团队支持计划项目(23IRTSTHN006),中原科技创新领军人才计划项目(234200510022),国家自然科学基金面上项目(52478320). （23IRTSTHN006）
