原文传递
Mechanical Performance of Circular Ultrahigh-Performance Concrete-Filled Double Skin High-Strength Steel Tubular Stub Columns under Axial Compression
| 题名： | Mechanical Performance of Circular Ultrahigh-Performance Concrete-Filled Double Skin High-Strength Steel Tubular Stub Columns under Axial Compression |
| 正文语种： | eng |
| 作者： | Yang, Bo;Shen, Le;Chen, Kang;Feng, Chen;Lin, Xuchuan;Elchalakani, Mohamed;Xu, Shaoqian |
| 作者单位： | China Earthquake Adm Key Lab Earthquake Engn & Engn Vibrat Inst Engn Mech 63 Fuxing Rd Beijing 100036 Peoples R China|Chongqing Univ Sch Civil Engn 83 Shabeijie Chongqing 400045 Peoples R China;Chongqing Univ Sch Civil Engn 83 Shabeijie Chongqing 400045 Peoples R China;Chongqing Univ Sch Civil Engn 83 Shabeijie Chongqing 400045 Peoples R China;Chongqing Univ Sch Civil Engn 83 Shabeijie Chongqing 400045 Peoples R China;China Earthquake Adm Key Lab Earthquake Engn & Engn Vibrat Inst Engn Mech 63 Fuxing Rd Beijing 100036 Peoples R China;Univ Western Australia Sch Civil Environm & Min Engn Crawley WA 6009 Australia;Chongqing Univ Sch Civil Engn 83 Shabeijie Chongqing 400045 Peoples R China |
| 关键词： | Ultra-high performance concrete;High-strength steel;Concrete-filled double skin steel tubular (CFDST);Stiffened CFDST;Finite-element (FE) analysis;Calculation method |
| 摘要： | This paper proposed a new type of stiffened circular ultra-high performance concrete-filled double skin steel tubular (UHPCFDST) column, in which stiffeners were applied to connect both inner and outer steel tubes. It efficiently delayed the local buckling of steel tubes and enhanced the integral of the section. This new type of UHPCFDST can be named multicells ultra-high performance concrete-filled double skin steel tubular (MUHPCFDST) column since the stiffener divided the sandwich space between the two steel tubes into multicells. Both the UHPCFDST and MUHPCFDST stub columns were fabricated and tested under centrally compression loading to investigate the axial mechanical behavior. The parameters considered in this study included specimen size, diameter-to-thickness ratio, the quantity of stiffener, and hollow ratio. Based on the tests, specimens' column failure mode, axial load-shortening curves, local buckling behavior, compounding strength, strength index, and ductility coefficient were obtained and discussed. Then, the authors proposed a uniaxial stress-strain function of ultra-high performance concrete under compression and established three-dimension finite-element (FE) models with this stress-strain model to simulate the axial behavior of UHPCFDST and MUHPCFDST columns. Compared with the experimental results, the average deviation of the FE analysis in predicting the column bearing capacity and corresponding axial shortening was -3% and -5.5%, respectively. Finally, parametric studies were carried out, and a calculation method was proposed. The parametric analysis results and predict ions from different methods (including the proposed method and methods suggested by existing design codes) were compared. The proposed method and calculating methods provided in AIJ-2008, EC4, and AS/NZS 2327 can reasonably predict the ultimate bearing capacity of both circular UHPCFDST and circular MUHPCFDST columns. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 3 |
| 页码： | 04021298.1-04021298.24 |
相关文献
- Experimental and Theoretical Studies of Hexagonal UHPC-Filled Double-Skin Steel Tubular Columns under Combined Compression and Bending
- Investigation of Concrete-Filled Double-Skin Steel Tubular Columns with Ultrahigh-Strength Steel
- Fire Resistance of Axially and Rotationally Restrained Concrete-Filled Double-Skin and Double-Tube Hollow Steel Columns
- Experimental Investigation of the Inelastic Cyclic Behavior of Concrete-Filled Double-Skin Tubular Beam-Columns with Corrugated Inner Skins and Ultrahigh-Strength Corner Tubes
- Experimental Behavior of Concrete-Filled Steel Tube Columns Using Ultrahigh-Strength Steel
- Design of Cold-Formed High-Strength Steel Tubular Stub Columns
检索历史
应用推荐
