|Table of Contents|

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

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

Issue:
2023年05期
Page:
60-68
Research Field:
建筑结构
Publishing date:

Info

Title:
Experimental study on interface shear performance of steel-UHPC composite plate using high performance cement-based adhesive
Author(s):
HU Wenxu1;  LI Cong2; 3;  CHEN Baochun1; 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)
Keywords:
steel-UHPC composite plate;  high performance cement-based adhesive;  high temperature;  age;  shear bond strength
PACS:
TU582
DOI:
10.19815/j.jace.2022.01060
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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Last Update: 2023-09-01