scholarly journals Interface Shear Strength at Joints of Ultra-High Performance Concrete Structures

2018 ◽  
Vol 12 (1) ◽  
Author(s):  
Young-Jin Kim ◽  
Won-Jong Chin ◽  
Se-Jin Jeon
Keyword(s):  
Shear Strength ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Ultra High Performance Concrete ◽  
Interface Shear Strength ◽  
Interface Shear

Local damage to Ultra High Performance Concrete structures caused by an impact of aircraft engine missiles

2010 ◽  
Vol 240 (10) ◽  
pp. 2633-2642 ◽  
Author(s):  
Werner Riedel ◽  
Markus Nöldgen ◽  
Elmar Straßburger ◽  
Klaus Thoma ◽  
Ekkehard Fehling
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Aircraft Engine ◽  
Local Damage ◽  
Ultra High Performance Concrete

scholarly journals Residual Tensile Stress Estimation for Shear Strength of UHPC Nonprismatic Beams

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Nasser Hakeem Tu’ma ◽  
Mustafa Raad Aziz ◽  
Haider Jabbar J. Barry
Keyword(s):  
Shear Strength ◽  
Tensile Stress ◽  
High Performance ◽  
High Performance Concrete ◽  
Longitudinal Axis ◽  
Steel Fibers ◽  
Experimental Program ◽  
Residual Tensile Stress ◽  
Ultra High Performance Concrete ◽  
Failure Patterns

Abstract Estimating the shear strength of Ultra-High-Performance Concrete (UHPC), with high compressive and tensile strengths, is complicated by many variables that affecting its behavior. Residual tensile stress (RTS) plays an important role in raising the efficiency of both types of resistance, especially shear strength due to the presence of steel fibers, which makes it difficult to quantify the residual tensile stress due to the different failure patterns of these fibers and the distribution mechanism within the concrete matrix. There is no study to date in assessing residual tensile stress of UHPC structural members of the variable section. Thirteen beams were selected as an experimental program to study six main variables in determining shear strength. Stirrups ratio, flexural reinforcement ratio, the volumetric fraction of steel fibers, geometry changing, existing openings along the longitudinal axis, and shear span to depth ratio. According to on Tests results, RTS is compatible with most of the global specifications.

Innovative ultra-high performance concrete structures

2008 ◽  
pp. 93-93
Author(s):  
N Shrive ◽  
P Seibert ◽  
G Parsekian ◽  
A Boucher ◽  
V Perry ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Ultra High Performance Concrete

scholarly journals Interface Shear Strength at Various Joint Types in High-Strength Precast Concrete Structures

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4364
Author(s):  
Young-Jin Kim ◽  
Won-Jong Chin ◽  
Se-Jin Jeon
Keyword(s):  
Compressive Strength ◽  
Shear Strength ◽  
Compressive Stress ◽  
Precast Concrete ◽  
Concrete Structures ◽  
High Strength ◽  
Curing Temperature ◽  
Interface Shear Strength ◽  
Interface Shear ◽  
Failure Loads

More precast concrete structures have recently been constructed due to their many advantages when compared to conventional cast-in-place construction. Structural behavior at the joints between the precast segments can significantly affect the overall integrity, safety, and serviceability of the structure. In this study, therefore, the interface shear strength of high-strength precast members was investigated by performing push-off tests with the following variables: compressive strength of precast members, dry or wet joint, number and height of shear keys, joint width, filler type, curing temperature, and lateral compressive stress. The test results were analyzed to reveal the effect of each test variable on the joint shear strengths of the specimens. For instance, the failure loads were increased by 14–140%, depending on the lateral compressive stress, as the specified compressive strength of the precast members was increased from 80 to 150 MPa in the dry joints. The failure loads of the wet joints strongly depended on the strength of the filler rather than on that of the precast members and, as a result, the specimen with ultra-high-strength concrete filler was 46–48% stronger than those with high-strength mortar filler. The shear strengths of various joint types obtained from the test were further analyzed in comparison with the predictive equations of Japan Society of Civil Engineers (JSCE) and American Association of State Highway and Transportation Officials (AASHTO) with the aim of validating the appropriateness of these design provisions. In particular, an improved value of a coefficient in the JSCE equation is proposed to cover a range of compressive strengths in various precast members and filling materials.

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