Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete
When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Tian, Jing [verfasserIn] Jiang, Xinghong [verfasserIn] Yang, Xinan [verfasserIn] Ma, Mingjie [verfasserIn] Li, Luheng [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Construction and building materials - Amsterdam [u.a.] : Elsevier Science, 1987, 336 |
|---|---|
| Übergeordnetes Werk: |
volume:336 |
| DOI / URN: |
10.1016/j.conbuildmat.2022.127525 |
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ELV007828691 |
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| 520 | |a When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. | ||
| 650 | 4 | |a Ultrahigh-performance concrete | |
| 650 | 4 | |a Normal concrete strength | |
| 650 | 4 | |a Composite | |
| 650 | 4 | |a Grooved interface | |
| 650 | 4 | |a Shear bond properties | |
| 650 | 4 | |a Strength prediction | |
| 700 | 1 | |a Jiang, Xinghong |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Xinan |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Mingjie |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Luheng |e verfasserin |4 aut | |
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10.1016/j.conbuildmat.2022.127525 doi (DE-627)ELV007828691 (ELSEVIER)S0950-0618(22)01202-8 DE-627 ger DE-627 rda eng 690 DE-600 56.45 bkl Tian, Jing verfasserin aut Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. Ultrahigh-performance concrete Normal concrete strength Composite Grooved interface Shear bond properties Strength prediction Jiang, Xinghong verfasserin aut Yang, Xinan verfasserin aut Ma, Mingjie verfasserin aut Li, Luheng verfasserin aut Enthalten in Construction and building materials Amsterdam [u.a.] : Elsevier Science, 1987 336 Online-Ressource (DE-627)320423115 (DE-600)2002804-0 (DE-576)259271187 nnns volume:336 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.45 Baustoffkunde AR 336 |
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10.1016/j.conbuildmat.2022.127525 doi (DE-627)ELV007828691 (ELSEVIER)S0950-0618(22)01202-8 DE-627 ger DE-627 rda eng 690 DE-600 56.45 bkl Tian, Jing verfasserin aut Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. Ultrahigh-performance concrete Normal concrete strength Composite Grooved interface Shear bond properties Strength prediction Jiang, Xinghong verfasserin aut Yang, Xinan verfasserin aut Ma, Mingjie verfasserin aut Li, Luheng verfasserin aut Enthalten in Construction and building materials Amsterdam [u.a.] : Elsevier Science, 1987 336 Online-Ressource (DE-627)320423115 (DE-600)2002804-0 (DE-576)259271187 nnns volume:336 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.45 Baustoffkunde AR 336 |
| allfields_unstemmed |
10.1016/j.conbuildmat.2022.127525 doi (DE-627)ELV007828691 (ELSEVIER)S0950-0618(22)01202-8 DE-627 ger DE-627 rda eng 690 DE-600 56.45 bkl Tian, Jing verfasserin aut Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. Ultrahigh-performance concrete Normal concrete strength Composite Grooved interface Shear bond properties Strength prediction Jiang, Xinghong verfasserin aut Yang, Xinan verfasserin aut Ma, Mingjie verfasserin aut Li, Luheng verfasserin aut Enthalten in Construction and building materials Amsterdam [u.a.] : Elsevier Science, 1987 336 Online-Ressource (DE-627)320423115 (DE-600)2002804-0 (DE-576)259271187 nnns volume:336 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.45 Baustoffkunde AR 336 |
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10.1016/j.conbuildmat.2022.127525 doi (DE-627)ELV007828691 (ELSEVIER)S0950-0618(22)01202-8 DE-627 ger DE-627 rda eng 690 DE-600 56.45 bkl Tian, Jing verfasserin aut Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. Ultrahigh-performance concrete Normal concrete strength Composite Grooved interface Shear bond properties Strength prediction Jiang, Xinghong verfasserin aut Yang, Xinan verfasserin aut Ma, Mingjie verfasserin aut Li, Luheng verfasserin aut Enthalten in Construction and building materials Amsterdam [u.a.] : Elsevier Science, 1987 336 Online-Ressource (DE-627)320423115 (DE-600)2002804-0 (DE-576)259271187 nnns volume:336 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.45 Baustoffkunde AR 336 |
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10.1016/j.conbuildmat.2022.127525 doi (DE-627)ELV007828691 (ELSEVIER)S0950-0618(22)01202-8 DE-627 ger DE-627 rda eng 690 DE-600 56.45 bkl Tian, Jing verfasserin aut Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. Ultrahigh-performance concrete Normal concrete strength Composite Grooved interface Shear bond properties Strength prediction Jiang, Xinghong verfasserin aut Yang, Xinan verfasserin aut Ma, Mingjie verfasserin aut Li, Luheng verfasserin aut Enthalten in Construction and building materials Amsterdam [u.a.] : Elsevier Science, 1987 336 Online-Ressource (DE-627)320423115 (DE-600)2002804-0 (DE-576)259271187 nnns volume:336 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.45 Baustoffkunde AR 336 |
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Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete |
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Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete |
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Tian, Jing |
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Tian, Jing Jiang, Xinghong Yang, Xinan Ma, Mingjie Li, Luheng |
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bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete |
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Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete |
| abstract |
When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. |
| abstractGer |
When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. |
| abstract_unstemmed |
When a diseased tunnel is reinforced by a UHPC-NC composite structure, the grooved interface has good bonding performance to ensure that the UHPC precast pipe co-works well with postcast NC. In this paper, the bonding properties of the UHPC-NC grooved interface were investigated by both slant shear tests and double-sided shear tests. Two factors, i.e., NC strength and groove density, are mainly considered. The results showed that the slant shear sample failed in the form of interface failure + NC failure or NC failure. The failure mode of the double-sided shear test was that the NC groove at the interface was cut off. The higher the NC strength is, the greater the shear strength of the interface. The increasing groove density leads to a high bond strength of the double-sided shear specimen, but the strength of the slanted shear specimen is basically unchanged. According to the failure mode of two-sided shear test, the shear bearing mechanism of UHPC-NC grooved interface is obtained, and the cohesion calculation formula of UHPC-NC slot interface is established. The results might provide a reference for design and construction of the interface of the UHPC-NC composite structure for tunnel reinforcement. |
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Bonding performance of the grooved interface between ultrahigh performance concrete and normal concrete |
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