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Implicit Gradient Delocalization Method for Force-Based Frame Element
| 题名： | Implicit Gradient Delocalization Method for Force-Based Frame Element |
| 正文语种： | 英文 |
| 作者： | Decheng Feng; Xiaodan Ren, Aff.M.ASCE;Jie Li, Aff.M.ASCE |
| 作者单位： | Tongji Univ |
| 关键词： | Force-based frame element; Strain softening; Delocalization; Implicit gradient method; Plastic hinge; Analysis and computation. |
| 摘要： | In this study, a novel force-based frame element with delocalization is developed to address localization issues induced by material strain softening. A regularization procedure for section deformations is introduced on the basis of the concept of deformation gradient dependency. The internal length scale of the gradient-based regularization model is discussed and related to the plastic hinge length of the structural members. The weak form of the governing equation is derived, and a subscale numerical strategy is utilized within each element to implement the proposed model in the frame element. In addition, an adaptive scheme is developed for the RC members to determine the real-time gradient coefficient. Finally, two numerical examples are utilized and the results show that the proposed model can achieve an objective response for and excellent prediction of the nonlinear behavior of RC members. DOI: 10.106l/(ASCE)ST.1943-541X.0001397. © 2015 American Society of Civil Engineers. |
| 出版日期： | 2016.02 |
| 出版年： | 2016 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | Vol.142 |
| 期： | NO.02 |
| 页码： | 04015122 |
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