Utdragskapacitet för bygel och stång ingjuten i håldäckskanal
(2014)Programmes in Helesingborg
- Abstract
- There are high requirements regarding the connection between a hollow-core
slab and the supporting wall or beam. One requirement is that the Connection must be able to withstand design loads parallel to the slab. STARKA Betongelement AB provides this by casting concrete and a steel Connection detail in one of the voids in the hollow-core slab on site. There have been questions about the reliability of the bonding between the void surface and the new cast concrete, which is the origin of the idea of this work.The purpose of this work is to investigate the shear bond strength between these two surfaces, in the hollow-core slab most commonly produced by STARKA. This is investigated by performing pull-out tests and theoretical models and the... (More) - There are high requirements regarding the connection between a hollow-core
slab and the supporting wall or beam. One requirement is that the Connection must be able to withstand design loads parallel to the slab. STARKA Betongelement AB provides this by casting concrete and a steel Connection detail in one of the voids in the hollow-core slab on site. There have been questions about the reliability of the bonding between the void surface and the new cast concrete, which is the origin of the idea of this work.The purpose of this work is to investigate the shear bond strength between these two surfaces, in the hollow-core slab most commonly produced by STARKA. This is investigated by performing pull-out tests and theoretical models and the load carrying capacity is compared with the design loads. The tests are performed on two different types of steel connection details: a reinforcement stirrup and a threaded rod.
Simplified calculations based on the finite element method have been used to model the state of stress in a concrete slab subjected to relevant loads. Furthermore, a study of available literature regarding concrete bonding to
concrete has been performed and compared to test results and design
requirements according to Eurocode.
Results of the pull-out tests and numerical calculations indicate that the
connection withstands the design loads for three examined types of fracture: fracture in the steel detail, bond failure between steel and concrete and bond failure between concrete and concrete. All of the tests showed fracture in the steel detail. The reinforcement stirrup withstood an average load of 98 kN, and the threaded rods 134 kN. This shows that the bond strength is sufficient, although a value of the bond strength could not be determined because of this type of failure not being critical. Keywords: concrete, bonding, pre-stressed hollow-core slab, progressive
collapse, connection, experiment. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/4467586
- author
- Malm, Henrik and Löfquist, Carl
- organization
- year
- 2014
- type
- M2 - Bachelor Degree
- subject
- keywords
- betong, vidhäftning, håldäcksbjälklag, hd/f, olyckslast, fortskridande ras, infästning, experiment
- language
- Swedish
- id
- 4467586
- date added to LUP
- 2014-06-17 03:43:40
- date last changed
- 2018-10-18 10:28:58
@misc{4467586,
abstract = {{There are high requirements regarding the connection between a hollow-core
slab and the supporting wall or beam. One requirement is that the Connection must be able to withstand design loads parallel to the slab. STARKA Betongelement AB provides this by casting concrete and a steel Connection detail in one of the voids in the hollow-core slab on site. There have been questions about the reliability of the bonding between the void surface and the new cast concrete, which is the origin of the idea of this work.The purpose of this work is to investigate the shear bond strength between these two surfaces, in the hollow-core slab most commonly produced by STARKA. This is investigated by performing pull-out tests and theoretical models and the load carrying capacity is compared with the design loads. The tests are performed on two different types of steel connection details: a reinforcement stirrup and a threaded rod.
Simplified calculations based on the finite element method have been used to model the state of stress in a concrete slab subjected to relevant loads. Furthermore, a study of available literature regarding concrete bonding to
concrete has been performed and compared to test results and design
requirements according to Eurocode.
Results of the pull-out tests and numerical calculations indicate that the
connection withstands the design loads for three examined types of fracture: fracture in the steel detail, bond failure between steel and concrete and bond failure between concrete and concrete. All of the tests showed fracture in the steel detail. The reinforcement stirrup withstood an average load of 98 kN, and the threaded rods 134 kN. This shows that the bond strength is sufficient, although a value of the bond strength could not be determined because of this type of failure not being critical. Keywords: concrete, bonding, pre-stressed hollow-core slab, progressive
collapse, connection, experiment.}},
author = {{Malm, Henrik and Löfquist, Carl}},
language = {{swe}},
note = {{Student Paper}},
title = {{Utdragskapacitet för bygel och stång ingjuten i håldäckskanal}},
year = {{2014}},
}