An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks
This article develops an enhanced UHPC-grout shear connection for steel-concrete composite bridges with precast decks. The primary improvement is the use of ultra-high performance concrete (UHPC) as the connection grout. To validate the constructability and the mechanical performance of the new conn...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2021-01-01
|
Series: | Advances in Civil Engineering |
Online Access: | http://dx.doi.org/10.1155/2021/5595174 |
id |
doaj-5c6e6abee16b4e41b70458fec50dfc65 |
---|---|
record_format |
Article |
spelling |
doaj-5c6e6abee16b4e41b70458fec50dfc652021-06-07T02:13:17ZengHindawi LimitedAdvances in Civil Engineering1687-80942021-01-01202110.1155/2021/5595174An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast DecksYongtao Zhang0Hehui Zheng1Minghao Tang2Zhiqi He3College of Civil EngineeringCCCC Second Harbour Engineering Co., Ltd.School of Civil EngineeringSchool of Civil EngineeringThis article develops an enhanced UHPC-grout shear connection for steel-concrete composite bridges with precast decks. The primary improvement is the use of ultra-high performance concrete (UHPC) as the connection grout. To validate the constructability and the mechanical performance of the new connection, two series of experimental tests (including grouting tests and push-out tests) were conducted. Results from the grouting tests show that both the pressure grouting method and the self-levelling grouting method are applicable to inject the UHPC grout into the channel void of the connection. Results from the push-out tests indicate that the advanced properties of UHPC allow for a significant improvement of the shear resistance of the adhesive connection over traditional cementitious grouts. The ultimate shear capacity of the adhesive connection is controlled by the interface shear strength between the embossed steel and the UHPC grout, with a cohesion value of approximately 5.87 MPa. Meanwhile, the residual frictional resistance can be taken as approximately one-half of the ultimate resistance. The results of the finite-element analysis show that the trilinear model is reasonable to simulate the shear-slip laws of the embossed steel-grout interface and the rough concrete-grout interface.http://dx.doi.org/10.1155/2021/5595174 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yongtao Zhang Hehui Zheng Minghao Tang Zhiqi He |
spellingShingle |
Yongtao Zhang Hehui Zheng Minghao Tang Zhiqi He An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks Advances in Civil Engineering |
author_facet |
Yongtao Zhang Hehui Zheng Minghao Tang Zhiqi He |
author_sort |
Yongtao Zhang |
title |
An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks |
title_short |
An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks |
title_full |
An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks |
title_fullStr |
An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks |
title_full_unstemmed |
An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks |
title_sort |
enhanced uhpc-grout shear connection for steel-concrete composite bridges with precast decks |
publisher |
Hindawi Limited |
series |
Advances in Civil Engineering |
issn |
1687-8094 |
publishDate |
2021-01-01 |
description |
This article develops an enhanced UHPC-grout shear connection for steel-concrete composite bridges with precast decks. The primary improvement is the use of ultra-high performance concrete (UHPC) as the connection grout. To validate the constructability and the mechanical performance of the new connection, two series of experimental tests (including grouting tests and push-out tests) were conducted. Results from the grouting tests show that both the pressure grouting method and the self-levelling grouting method are applicable to inject the UHPC grout into the channel void of the connection. Results from the push-out tests indicate that the advanced properties of UHPC allow for a significant improvement of the shear resistance of the adhesive connection over traditional cementitious grouts. The ultimate shear capacity of the adhesive connection is controlled by the interface shear strength between the embossed steel and the UHPC grout, with a cohesion value of approximately 5.87 MPa. Meanwhile, the residual frictional resistance can be taken as approximately one-half of the ultimate resistance. The results of the finite-element analysis show that the trilinear model is reasonable to simulate the shear-slip laws of the embossed steel-grout interface and the rough concrete-grout interface. |
url |
http://dx.doi.org/10.1155/2021/5595174 |
work_keys_str_mv |
AT yongtaozhang anenhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT hehuizheng anenhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT minghaotang anenhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT zhiqihe anenhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT yongtaozhang enhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT hehuizheng enhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT minghaotang enhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks AT zhiqihe enhanceduhpcgroutshearconnectionforsteelconcretecompositebridgeswithprecastdecks |
_version_ |
1721393225705455616 |