Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints
This study examined the reliability and limitations of code equations for determining the shear friction strength of a concrete interface with construction joints. This was achieved by examining the code equations (ACI 318-14, AASHTO, and fib 2010) and comparing the results predicted by equations wi...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/9264503 |
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| author | Seung-Jun Kwon Keun-Hyeok Yang Ju-Hyun Mun |
| author_facet | Seung-Jun Kwon Keun-Hyeok Yang Ju-Hyun Mun |
| author_sort | Seung-Jun Kwon |
| collection | DOAJ |
| description | This study examined the reliability and limitations of code equations for determining the shear friction strength of a concrete interface with construction joints. This was achieved by examining the code equations (ACI 318-14, AASHTO, and fib 2010) and comparing the results predicted by equations with experimental data compiled from 207 push-off specimens (133 rough and 74 smooth construction joints). The integrated mechanical model for the monolithic interface, derived from the upper-bound theorem of concrete plasticity, was also modified to estimate the shear friction strength of the construction joints. The upper limit for shear friction strength was formulated from a concrete crushing failure limit on the strut-and-tie action along the interfacial plane, to avoid overestimating the shear transfer capacity of transverse reinforcement with a high clamping force. Code equations are highly conservative and dispersive in predicting the shear friction strength of rough construction joints and yield large scattering in the data for the ratios between the measured and predicted shear friction strengths. The predictions obtained using the proposed model agreed well with test results, indicating correlating trends with the test results for evaluating the effects of various parameters on the shear friction strength of rough construction joints. According to the proposed model, the values of cohesion and coefficient of friction for concrete could be determined as 0.11 fc′0.65 and 0.64, respectively, for smooth construction joints and 0.27 fc′0.65 and 0.95, respectively, for rough construction joints, where fc′ is the compressive strength of concrete. |
| format | Article |
| id | doaj-art-9c5837ac5f59440da1f7923eabf169fe |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-9c5837ac5f59440da1f7923eabf169fe2025-02-03T05:50:08ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/92645039264503Mechanical Model for Shear Friction Capacity of Concrete at Construction JointsSeung-Jun Kwon0Keun-Hyeok Yang1Ju-Hyun Mun2Civil and Environment Engineering, Hannam University, Daejeon, Republic of KoreaArchitectural Engineering, Kyonggi University, Suwon, Republic of KoreaArchitectural Engineering, Kyonggi University, Suwon, Republic of KoreaThis study examined the reliability and limitations of code equations for determining the shear friction strength of a concrete interface with construction joints. This was achieved by examining the code equations (ACI 318-14, AASHTO, and fib 2010) and comparing the results predicted by equations with experimental data compiled from 207 push-off specimens (133 rough and 74 smooth construction joints). The integrated mechanical model for the monolithic interface, derived from the upper-bound theorem of concrete plasticity, was also modified to estimate the shear friction strength of the construction joints. The upper limit for shear friction strength was formulated from a concrete crushing failure limit on the strut-and-tie action along the interfacial plane, to avoid overestimating the shear transfer capacity of transverse reinforcement with a high clamping force. Code equations are highly conservative and dispersive in predicting the shear friction strength of rough construction joints and yield large scattering in the data for the ratios between the measured and predicted shear friction strengths. The predictions obtained using the proposed model agreed well with test results, indicating correlating trends with the test results for evaluating the effects of various parameters on the shear friction strength of rough construction joints. According to the proposed model, the values of cohesion and coefficient of friction for concrete could be determined as 0.11 fc′0.65 and 0.64, respectively, for smooth construction joints and 0.27 fc′0.65 and 0.95, respectively, for rough construction joints, where fc′ is the compressive strength of concrete.http://dx.doi.org/10.1155/2018/9264503 |
| spellingShingle | Seung-Jun Kwon Keun-Hyeok Yang Ju-Hyun Mun Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints Advances in Materials Science and Engineering |
| title | Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints |
| title_full | Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints |
| title_fullStr | Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints |
| title_full_unstemmed | Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints |
| title_short | Mechanical Model for Shear Friction Capacity of Concrete at Construction Joints |
| title_sort | mechanical model for shear friction capacity of concrete at construction joints |
| url | http://dx.doi.org/10.1155/2018/9264503 |
| work_keys_str_mv | AT seungjunkwon mechanicalmodelforshearfrictioncapacityofconcreteatconstructionjoints AT keunhyeokyang mechanicalmodelforshearfrictioncapacityofconcreteatconstructionjoints AT juhyunmun mechanicalmodelforshearfrictioncapacityofconcreteatconstructionjoints |