Interface Shear Strength at Joints of Ultra‑High Performance Concrete Structures

When ultra-high performance concrete (UHPC) is fabricated as precast members such as in a UHPC segmental bridge, the joint design between the precast members can significantly affect the overall integrity and safety of the structure. Therefore, the structural behavior of the UHPC joint was experimen...

Full description

Saved in:
Bibliographic Details
Published in:International journal of concrete structures and materials 2018, 12(6), 43, pp.767-780
Main Authors: Kim, Young-Jin, Chin, Won-Jong, Jeon, Se-Jin
Format: Article
Language:English
Subjects:
Building Materials
Compressive properties
Compressive strength
Concrete
Concrete structures
Concretes
dry joint
Engineering
interface shear strength
Interfacial shear strength
Joints (Construction)
Mathematical analysis
Mechanical properties
Observations
Precast concrete
push-off test
Shear (Mechanics)
shear key
Shear strength
Solid Mechanics
Structural Materials
Ultra high performance concrete
wet joint
토목공학
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:When ultra-high performance concrete (UHPC) is fabricated as precast members such as in a UHPC segmental bridge, the joint design between the precast members can significantly affect the overall integrity and safety of the structure. Therefore, the structural behavior of the UHPC joint was experimentally investigated in this study with test variables including joint type, number and height of shear keys, type of filler, curing temperature, and lateral compressive stress. The UHPC considered in this study is the K-UHPC developed in Korea with a specified compressive strength as high as 180 MPa and high flowability. The joint shear strengths affected by the test variables were investigated in detail. The test results were also compared with two representative predictive equations for interface shear strength to determine an appropriate equation for the joint design of UHPC. These equations did not match well with the test data because they were originally proposed for normal strength concrete. However, the JSCE equation could be improved by modifying a coefficient to show good agreement with the test especially in the case of the dry joint with epoxy application.
ISSN:1976-0485
2234-1315
DOI:10.1186/s40069-018-0298-8