原文传递
Utilization of Nonlinear Finite Elements for the Design and Assessment of Large Concrete Structures. I: Calibration and Validation
| 题名： | Utilization of Nonlinear Finite Elements for the Design and Assessment of Large Concrete Structures. I: Calibration and Validation |
| 其他题名： | AASHTO.(2013).AASHTO LRFD bridge design specifications,6th Ed.,Washington,DC. |
| 正文语种： | 英文 |
| 作者： | Mehdi Ben Ftima |
| 关键词： | Concrete structures;Nonlinear finite element;Concrete models;Verification and validation (V&V);Size effect;Design and assessment;Structural safety and reliability |
| 摘要： | This two-part paper is an application of advanced nonlinear finite-element analyses (ANFEA) for the design or assessment of large concrete structures. It presents an innovative application of ANFEA that reveals many important aspects of numerical modeling and safety verification, starting from the material up to the structural level and going from calibration and validation to the prediction level. A complex hydraulic structure with large members and nonconventional boundary conditions is taken as the target design structure (TDS). Following a two-step procedure that was proposed in a previous paper, the model error is first computed for two candidate concrete models (part 1). Using the selected concrete model and the corresponding model error, the global resistance factor is computed in a second step for the TDS (part 2). This first part is related to the calibration and validation assessments for the ANFEA models of concrete structures. These issues can be viewed as two basic steps within the verification and validation process (V&V) that has been adopted in other engineering fields. In the calibration procedure, the size effect phenomenon, which is a major parameter for the TDS, is considered. The distinction between size effect statistical (material) and deterministic (energetic) components is highlighted, and a new approach for considering each contribution is presented. The validation process is undertaken from the material to the structural level. It is shown through this process that the use of only the compressive strength of concrete and the yield stress of reinforcement are sufficient with one candidate concrete model in order to obtain a relatively low coefficient of variation of model error. The paper illustrates a general methodology that can be applied with any ANFEA software to design or assess the safety level of unusual concrete structures. |
| 出版年： | 2015 |
| 论文唯一标识： | P-26Y2015V141N09010 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001160 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 141 |
| 期： | 09 |
| 页码： | 106-117 |
相关文献
- Utilization of Nonlinear Finite Elements for the Design and Assessment of Large Concrete Structures. II: Applications
- Finite-Element Modeling of Hybrid Concrete-Masonry Frames Subjected to In-Plane Loads
- CAN ACI 562 APPLY TO BRIDGEWORK?
- A PFEM Background Mesh for Simulating Fluid and Frame Structure Interaction
- Numerical Investigation of the Punching Resistance of Reinforced Concrete Flat Plates
- Probabilistic Beam-Column Joint Model for Seismic Analysis of Concrete Frames
检索历史
应用推荐
