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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Main Authors: Dawei Zhang, Xiaogang Ma, Huijie Shen, Songsong Guo, Chao Liu
Format: Article
Language:English
Published: MDPI AG 2023-08-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/16/16/5586
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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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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
work_keys_str_mv AT daweizhang analysisofstructuralparametersofsteelncuhpccompositebeams
AT xiaogangma analysisofstructuralparametersofsteelncuhpccompositebeams
AT huijieshen analysisofstructuralparametersofsteelncuhpccompositebeams
AT songsongguo analysisofstructuralparametersofsteelncuhpccompositebeams
AT chaoliu analysisofstructuralparametersofsteelncuhpccompositebeams