西南交通大学学报 2005, 40(5) 600-604 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
新老混凝土
抗剪性能
试验研究
界面剂
植筋
本文作者相关文章
王振领
林拥军
钱永久
PubMed
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新老混凝土结合面抗剪性能试验研究

王振领;林拥军;钱永久

西南交通大学土木工程学院,四川成都610031

摘要

对6组共18个Z型抗剪试件的新老混凝土结合面进行了全过程抗剪试验,考察了新老混凝土结合面不 同处理方法对其抗剪性能的影响.试验结果表明:结合面的不同处理方法对其抗剪性能影响较大,涂刷水泥净浆 的效果远好于直接浇筑新混凝土和涂刷商品界面剂,植入抗剪钢筋能显著提高结合面抗剪性能.根据研究结果 建议,在实际加固工程中,抗剪钢筋植入深度最好大于钢筋直径的10倍.

关键词 新老混凝土   抗剪性能   试验研究   界面剂   植筋   

ExperimentalResearch on Shear Properties of New-to-O ld Concrete Interface

WANG Zhen-ling;LIN Yong-jun;QIAN Yong-jiu

School ofCivilEng., Southwest JiaotongUniversity, Chengdu 610031, China

Abstract:

Shear experiments were conducted on 18 Z-shape specimens from 6 different groups to investigate the shear properties of the interface of new and old concrete. The effects of different interfacial techniques,i. e., smearing cement paste, directly casting new concrete, and smearing commercial interfacial agents, on the shearpropertieswere investigated. The experimental results show that the interfacial techniques have a great effect on the shear properties of a new-to-old concrete interface. The shear strength of specimens is greatestwhen the technique of smearing cementpaste is used in the three interfacial techniques. Furthermore, reinforcing steel bar planting can improve the shear properties of the interface remarkably. The experiments show that the depth of reinforcing steel barplanting should be greater than ten times the diameter of a reinforcing steel bar in the repair and strengthening of structures.

Keywords: shear property   experimental research   agent   steelbar planting    new-to-old concrete  
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本刊中的类似文章
1.张摇晶;王振领;钱永久.拱桥加固中新老混凝土结合面的受力性能[J]. 西南交通大学学报, 2009,44(4): 564-568

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