原文传递
Blast Analysis of RC Beams Based on Moment-Curvature Relationship Considering Fixed-End Rotation
| 题名： | Blast Analysis of RC Beams Based on Moment-Curvature Relationship Considering Fixed-End Rotation |
| 其他题名： | ABAQUS[Computer software].Dassault Systèmes,Waltham,MA. |
| 正文语种： | 英文 |
| 作者： | Gang-Kyu Park |
| 关键词： | Blast loading;Dynamic increase factor;Moment-curvature relationship;Plastic hinge length;Fixed-end rotation;Analysis and computation |
| 摘要： | An improved numerical model that can simulate the nonlinear behavior of RC beams subjected to blast loadings is introduced in this paper. The model is based on the moment-curvature relationship of a RC section, and a dynamic increase factor (DIF) defined with the curvature rate is newly designed to be used in the moment-curvature relationship. The plastic hinge length is considered in the finite-element (FE) idealization of RC beams to accurately reflect the effects of the plastic deformation concentrated at the midspan or beam-column joint after yielding of the main reinforcement. A modification of the moment-curvature relationship is also proposed to take into account the fixedend rotation accompanied by large bond-slip at the yielding stage of the main reinforcement. The advantages of the proposed model, compared with the layered-section approach, are reduced calculation time and memory space in application to large-frame structures with many degrees of freedom. Finally, correlation studies between analytical results and experimental studies are conducted to establish the validity of the proposed model, and the effect of the finite-element mesh size is also discussed in connection with the importance of considering the fixed-end rotation. The results are also compared with those obtained from the single-degree-of-freedom (SDOF) model to demonstrate the better prediction capability of the proposed method. |
| 出版年： | 2017 |
| 论文唯一标识： | P-26Y2017V143N09028 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001837 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 143 |
| 期： | 09 |
| 页码： | 338-348 |
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