Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses
Due to the complex hydrogeological conditions in coastal regions, the use of internal bracing systems is necessary for supporting coastal foundation pits. This paper introduces a novel prefabricated foundation pit bracing system based on Hollow Concrete-Filled Steel Tube (H-CFST) structures that can...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/10/2009 |
| _version_ | 1797573334308749312 |
|---|---|
| author | Zizhang Dong Huadong Peng Kun Wang Tao Liu |
| author_facet | Zizhang Dong Huadong Peng Kun Wang Tao Liu |
| author_sort | Zizhang Dong |
| collection | DOAJ |
| description | Due to the complex hydrogeological conditions in coastal regions, the use of internal bracing systems is necessary for supporting coastal foundation pits. This paper introduces a novel prefabricated foundation pit bracing system based on Hollow Concrete-Filled Steel Tube (H-CFST) structures that can be reused, offering significant economic and societal benefits. However, there is a severe lack of research on the application of H-CFST bracing systems. Through model tests and finite element simulations, the load-displacement characteristics and failure modes of prefabricated H-CFST bracing under transverse bending were investigated. The study revealed that when a wall thickness of 1.5 <i>d</i> was chosen, the self-designed hoop effectively mitigated strength and stiffness reduction at the bracing connection point. When the load reached 150 kN, the outer steel tube of the H-CFST components experienced localized yielding, and when the load was increased to 300 kN, the end supports exhibited cracking. Finite element analysis provided a more accurate prediction of bracing failure at 147.18 kN, and it offered valuable insights for optimizing the bracing design. Based on the above research, theoretical methods for calculating the bearing capacity of each bracing component under transverse bending conditions have been proposed and validated against experimental results. |
| first_indexed | 2024-03-10T21:09:21Z |
| format | Article |
| id | doaj.art-e3c50cd14c314918b7ed41f631271807 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T21:09:21Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-e3c50cd14c314918b7ed41f6312718072023-11-19T16:59:50ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-10-011110200910.3390/jmse11102009Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical AnalysesZizhang Dong0Huadong Peng1Kun Wang2Tao Liu3Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaShanghai Survey, Design and Research Institute (Group) Co., Ltd., Qingdao 266100, ChinaShandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaShandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, ChinaDue to the complex hydrogeological conditions in coastal regions, the use of internal bracing systems is necessary for supporting coastal foundation pits. This paper introduces a novel prefabricated foundation pit bracing system based on Hollow Concrete-Filled Steel Tube (H-CFST) structures that can be reused, offering significant economic and societal benefits. However, there is a severe lack of research on the application of H-CFST bracing systems. Through model tests and finite element simulations, the load-displacement characteristics and failure modes of prefabricated H-CFST bracing under transverse bending were investigated. The study revealed that when a wall thickness of 1.5 <i>d</i> was chosen, the self-designed hoop effectively mitigated strength and stiffness reduction at the bracing connection point. When the load reached 150 kN, the outer steel tube of the H-CFST components experienced localized yielding, and when the load was increased to 300 kN, the end supports exhibited cracking. Finite element analysis provided a more accurate prediction of bracing failure at 147.18 kN, and it offered valuable insights for optimizing the bracing design. Based on the above research, theoretical methods for calculating the bearing capacity of each bracing component under transverse bending conditions have been proposed and validated against experimental results.https://www.mdpi.com/2077-1312/11/10/2009coastal foundation pithollow concrete-filled steel tubeinterior bracingtransverse bending performancemodel testfinite element analysis |
| spellingShingle | Zizhang Dong Huadong Peng Kun Wang Tao Liu Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses Journal of Marine Science and Engineering coastal foundation pit hollow concrete-filled steel tube interior bracing transverse bending performance model test finite element analysis |
| title | Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses |
| title_full | Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses |
| title_fullStr | Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses |
| title_full_unstemmed | Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses |
| title_short | Performance of Prefabricated Hollow Concrete-Filled Steel Tube Bracings on Transverse Bending: Experimental and Numerical Analyses |
| title_sort | performance of prefabricated hollow concrete filled steel tube bracings on transverse bending experimental and numerical analyses |
| topic | coastal foundation pit hollow concrete-filled steel tube interior bracing transverse bending performance model test finite element analysis |
| url | https://www.mdpi.com/2077-1312/11/10/2009 |
| work_keys_str_mv | AT zizhangdong performanceofprefabricatedhollowconcretefilledsteeltubebracingsontransversebendingexperimentalandnumericalanalyses AT huadongpeng performanceofprefabricatedhollowconcretefilledsteeltubebracingsontransversebendingexperimentalandnumericalanalyses AT kunwang performanceofprefabricatedhollowconcretefilledsteeltubebracingsontransversebendingexperimentalandnumericalanalyses AT taoliu performanceofprefabricatedhollowconcretefilledsteeltubebracingsontransversebendingexperimentalandnumericalanalyses |