Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete
The secondary development of ABAQUS was carried out to calculate the shrinkage and creep of concrete, and a finite element model of the China Railway Track System (CRTS) II slab ballastless track was established. Then, the interlaminar stress of CRTS II slab ballastless track at different ages of th...
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| author | Zhihui Zheng Peng Liu Zhiwu Yu Yachuan Kuang Lei Liu Sasa He Xiaoqiang Zhang Qianghui Li Wen Xu Maofeng Lv |
| author_facet | Zhihui Zheng Peng Liu Zhiwu Yu Yachuan Kuang Lei Liu Sasa He Xiaoqiang Zhang Qianghui Li Wen Xu Maofeng Lv |
| author_sort | Zhihui Zheng |
| collection | DOAJ |
| description | The secondary development of ABAQUS was carried out to calculate the shrinkage and creep of concrete, and a finite element model of the China Railway Track System (CRTS) II slab ballastless track was established. Then, the interlaminar stress of CRTS II slab ballastless track at different ages of the track slab during laying (AOTSL) caused by concrete shrinkage and creep was studied. The obtained results showed that the stress redistribution occurred in the sliding layer, which resulted in the generation of a gap. Although the gap length was slightly reduced due to the shear cogging, the sliding layer at the slab edge is more prone to produce gaps. Under the effect of shrinkage and creep of the ballastless track, large additional shear stress, up to 0.676 MPa, was induced at the interface between CA mortar and the track slab. Meanwhile, the appearance of additional vertical and lateral forces of the shear cogging was caused by the shrinkage and creep of the ballastless track. Additionally, by further analysis, the recommended AOTSL ranges from 120 days to 180 days. |
| first_indexed | 2024-03-09T11:41:40Z |
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| id | doaj.art-996d80b5aeec4b50b5ba647b86c587ff |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:41:40Z |
| publishDate | 2022-03-01 |
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| series | Materials |
| spelling | doaj.art-996d80b5aeec4b50b5ba647b86c587ff2023-11-30T23:32:44ZengMDPI AGMaterials1996-19442022-03-01157248010.3390/ma15072480Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of ConcreteZhihui Zheng0Peng Liu1Zhiwu Yu2Yachuan Kuang3Lei Liu4Sasa He5Xiaoqiang Zhang6Qianghui Li7Wen Xu8Maofeng Lv9School of Civil Engineering, Central South University, 22 Shaoshan Road, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, 22 Shaoshan Road, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, 22 Shaoshan Road, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, 22 Shaoshan Road, Changsha 410075, ChinaSchool of Civil Engineering, Central South University, 22 Shaoshan Road, Changsha 410075, ChinaHunan Zhongda Design Institue Co., Ltd., 68 Shaoshan Road, Changsha 410075, ChinaJinan Municipal Engineering Design & Research Institute Group Co., Ltd., Jinan 250004, ChinaHunan Zhongda Design Institue Co., Ltd., 68 Shaoshan Road, Changsha 410075, ChinaRailway Group 5 Mechanization of Engineering Co., Ltd., 32 HongtangCong Road, Hengyang 421002, ChinaRailway Group 5 Mechanization of Engineering Co., Ltd., 32 HongtangCong Road, Hengyang 421002, ChinaThe secondary development of ABAQUS was carried out to calculate the shrinkage and creep of concrete, and a finite element model of the China Railway Track System (CRTS) II slab ballastless track was established. Then, the interlaminar stress of CRTS II slab ballastless track at different ages of the track slab during laying (AOTSL) caused by concrete shrinkage and creep was studied. The obtained results showed that the stress redistribution occurred in the sliding layer, which resulted in the generation of a gap. Although the gap length was slightly reduced due to the shear cogging, the sliding layer at the slab edge is more prone to produce gaps. Under the effect of shrinkage and creep of the ballastless track, large additional shear stress, up to 0.676 MPa, was induced at the interface between CA mortar and the track slab. Meanwhile, the appearance of additional vertical and lateral forces of the shear cogging was caused by the shrinkage and creep of the ballastless track. Additionally, by further analysis, the recommended AOTSL ranges from 120 days to 180 days.https://www.mdpi.com/1996-1944/15/7/2480ballastless trackshrinkagecreepinterfacial stress |
| spellingShingle | Zhihui Zheng Peng Liu Zhiwu Yu Yachuan Kuang Lei Liu Sasa He Xiaoqiang Zhang Qianghui Li Wen Xu Maofeng Lv Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete Materials ballastless track shrinkage creep interfacial stress |
| title | Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete |
| title_full | Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete |
| title_fullStr | Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete |
| title_full_unstemmed | Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete |
| title_short | Numerical Investigation of Interlaminar Stress of CRTS II Slab Ballastless Track Induced by Creep and Shrinkage of Concrete |
| title_sort | numerical investigation of interlaminar stress of crts ii slab ballastless track induced by creep and shrinkage of concrete |
| topic | ballastless track shrinkage creep interfacial stress |
| url | https://www.mdpi.com/1996-1944/15/7/2480 |
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