Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams
The cracking of the negative moment area of steel–normal concrete (NC) composite bridges is common owning to the low tensile strength of concrete. In order to solve the problem, Ultra High Performance Concrete (UHPC) is used to enhance the tensile performance of the negative moment area. This paper...
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MDPI AG
2023-08-01
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author | Dawei Zhang Xiaogang Ma Huijie Shen Songsong Guo Chao Liu |
author_facet | Dawei Zhang Xiaogang Ma Huijie Shen Songsong Guo Chao Liu |
author_sort | Dawei Zhang |
collection | DOAJ |
description | The cracking of the negative moment area of steel–normal concrete (NC) composite bridges is common owning to the low tensile strength of concrete. In order to solve the problem, Ultra High Performance Concrete (UHPC) is used to enhance the tensile performance of the negative moment area. This paper conducted interface experiments to study the bonding behaviour of the UHPC–NC interface. The design parametric analysis of steel–NC–UHPC composite bridges was carried out based on the interface experimental results. Firstly, slant shear tests and flexural shear tests were carried out to study the rationality of the interface handling methods. Then, the finite element model was used to analyze the state of every component in the composite beams based on experimental results, such as the stress of UHPC, concrete and steel plate. Finally, the calculation results of finite analysis were compared and summarized. It is concluded that (1) the chiseling interface can meet the utilization requirements of physical bridges. The average shear stress and flexural tensile strength of the chiseling interface are 10.29 MPa and 1.93 MPa, respectively. In the failure state, a slight interface damage occurs for specimens with a chiseling interface. (2) The influence on overall performance is different for changes in different design parameters. The thickness of concrete has a significant influence on the stress distribution of composite slabs. (3) Reliable interface simulation is conducted in the finite element models based on interface test results. The stress variation patterns are reflected in the change of design parameters. |
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format | Article |
id | doaj.art-17302d461bcf48d68c39b6a62aac5d54 |
institution | Directory Open Access Journal |
issn | 1996-1944 |
language | English |
last_indexed | 2024-03-10T23:46:12Z |
publishDate | 2023-08-01 |
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series | Materials |
spelling | doaj.art-17302d461bcf48d68c39b6a62aac5d542023-11-19T01:59:45ZengMDPI AGMaterials1996-19442023-08-011616558610.3390/ma16165586Analysis of Structural Parameters of Steel–NC–UHPC Composite BeamsDawei Zhang0Xiaogang Ma1Huijie Shen2Songsong Guo3Chao Liu4Shanghai Pudong Architectural Design & Research Institute Co., Ltd., Shanghai 201204, ChinaShanghai Pudong Architectural Design & Research Institute Co., Ltd., Shanghai 201204, ChinaShanghai Pudong Architectural Design & Research Institute Co., Ltd., Shanghai 201204, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaThe cracking of the negative moment area of steel–normal concrete (NC) composite bridges is common owning to the low tensile strength of concrete. In order to solve the problem, Ultra High Performance Concrete (UHPC) is used to enhance the tensile performance of the negative moment area. This paper conducted interface experiments to study the bonding behaviour of the UHPC–NC interface. The design parametric analysis of steel–NC–UHPC composite bridges was carried out based on the interface experimental results. Firstly, slant shear tests and flexural shear tests were carried out to study the rationality of the interface handling methods. Then, the finite element model was used to analyze the state of every component in the composite beams based on experimental results, such as the stress of UHPC, concrete and steel plate. Finally, the calculation results of finite analysis were compared and summarized. It is concluded that (1) the chiseling interface can meet the utilization requirements of physical bridges. The average shear stress and flexural tensile strength of the chiseling interface are 10.29 MPa and 1.93 MPa, respectively. In the failure state, a slight interface damage occurs for specimens with a chiseling interface. (2) The influence on overall performance is different for changes in different design parameters. The thickness of concrete has a significant influence on the stress distribution of composite slabs. (3) Reliable interface simulation is conducted in the finite element models based on interface test results. The stress variation patterns are reflected in the change of design parameters.https://www.mdpi.com/1996-1944/16/16/5586steel–normal concrete (NC)–Ultra High Performance Concrete (UHPC) composite slabsinterface testsdesignparametric analysis |
spellingShingle | Dawei Zhang Xiaogang Ma Huijie Shen Songsong Guo Chao Liu Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams Materials steel–normal concrete (NC)–Ultra High Performance Concrete (UHPC) composite slabs interface tests design parametric analysis |
title | Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams |
title_full | Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams |
title_fullStr | Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams |
title_full_unstemmed | Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams |
title_short | Analysis of Structural Parameters of Steel–NC–UHPC Composite Beams |
title_sort | analysis of structural parameters of steel nc uhpc composite beams |
topic | steel–normal concrete (NC)–Ultra High Performance Concrete (UHPC) composite slabs interface tests design parametric analysis |
url | https://www.mdpi.com/1996-1944/16/16/5586 |
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