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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

40卷

期数:

2023年05期

页码:

60-68

栏目:

建筑结构

出版日期:

2023-09-15

文章信息/Info

Title:

Experimental study on interface shear performance of steel-UHPC composite plate using high performance cement-based adhesive

文章编号:

1673-2049(2023)05-0060-09

作者:

胡文旭¹,李 聪^2,3,陈宝春^1,2

(1. 福州大学 土木工程学院,福建 福州 350108; 2. 福建理工大学 土木工程学院,福建 福州 350118; 3. 广西大学 土木建筑工程学院,广西 南宁 530004)

Author(s):

HU Wenxu¹, LI Cong^2,3, CHEN Baochun^1,2

(1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 2. School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, Fujian, China; 3. School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, China)

关键词:

钢-UHPC组合板;  高性能水泥基黏结剂;  高温;  龄期;  抗剪黏结强度

Keywords:

steel-UHPC composite plate;  high performance cement-based adhesive;  high temperature;  age;  shear bond strength

分类号:

TU582

DOI:

10.19815/j.jace.2022.01060

文献标志码:

A

摘要:

为探究高性能水泥基黏结剂(HPCA)作为钢-UHPC组合板黏结剂的可能性,以黏结剂种类、龄期、温度和黏结面积作为参数,开展了24个水泥基黏结剂连接的钢-UHPC组合板的界面抗剪试验,分析各参数对黏结界面的破坏模式、抗剪黏结强度的影响规律。结果表明:在常温条件下,采用高性能水泥基黏结剂的试件主要发生黏结层内聚破坏(B类破坏),采用普通水泥基黏结剂(NCA)的试件发生黏结层和UHPC板界面脱粘破坏(C类破坏),NCA的抗剪黏结强度仅为HPCA的47.9%; 在高温条件下,HPCA的抗剪黏结强度降幅为40%～60%,但仍超过1.0 MPa; 龄期对抗剪黏结强度影响较大,当龄期从7 d增加至28 d和90 d时,HPCA的抗剪黏结强度分别提高了29.2%和38.1%,且相应的材料抗折强度分别提高了32.8%和35.2%,二者提高幅度相当,说明抗剪黏结强度与材料抗折强度有较强的相关性; 抗剪黏结强度受黏结面积的影响较小,当黏结面积从100 cm²减小至75 cm²和50 cm²时,抗剪黏结强度分别增高了3.1%和8.4%。

Abstract:

In order to explore the possibility of using high performance cement-based adhesive(HPCA)as a adhesive for steel-UHPC composite plates, the type, age, temperature, and bonding area of the adhesive were used as parameters. 24 interface shear tests were conducted on steel-UHPC composite plates connected with cement-based adhesives to analyze the influence of various parameters on the failure mode and shear bond strength of the bonding interface. The results show that under normal temperature conditions, specimens using high performance cement-based adhesives mainly exhibit cohesive failure of the bonding layer(type B failure). The interface debonding failure between the bonding layer and UHPC plate occurs in the specimens using ordinary cement-based adhesive(NCA)(type C failure), and the shear bond strength of NCA is only 47.9% of that of HPCA. Under high temperature conditions, the shear bond strength of HPCA decreases by 40%-60%, but still exceeds 1.0 MPa. Age has a significant impact on the shear bond strength. When the age increases from 7 d to 28 d and 90 d, the shear bond strength of HPCA increases by 29.2% and 38.1%, respectively, and the corresponding material's flexural strength increases by 32.8% and 35.2%, respectively, with similar increases in magnitude. There is a strong correlation between shear bond strength and material bending strength. The shear bond strength is less affected by the bonding area. When the bonding area decreases from 100 cm² to 75 cm² and 50 cm², the shear bond strength increases by 3.1% and 8.4%, respectively.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2022-01-15
基金项目:国家重点研发计划项目(2018YFC0705400); 中国博士后站中特别资助项目(2023T160138); 广西大学高层次人才资助项目(A3030051017,A3030051026); 广西青年自然科学基金项目(2021GXNSFBA220006)
作者简介:胡文旭(1997-),男,工学博士研究生,E-mail:1056768983@qq.com。
通信作者:李 聪(1990-),男,工学博士,教授,E-mail:congli@gxu.edu.cn。

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更新日期/Last Update: 2023-09-01