科研之友
微信
新浪微博
Facebook
分享链接
摘要
Column failure is the primary cause of collapse during earthquakes for many existing reinforced concrete buildings. The main objective of this article is to develop a macro model to reproduce the lateral load-deformation response of reinforced concrete columns with limited ductility due to degradation of shear resistance. This model will eventually be used to perform probabilistic assessments of collapse risk for existing reinforced concrete frame structures, and hence must be computationally efficient. Current modeling approaches for reinforced concrete components provide a reasonably accurate prediction of flexural and longitudinal bar slip response, while shear deformations and, in particular, post-peak shear behavior needs further development. The shear response introduced in this article is based on a mechanical approach for pre-peak, point of shear failure, and post-peak behavior of reinforced concrete columns. Flexural, shear, and longitudinal bar slip responses are simulated by individual springs in series. These springs are combined to obtain the total lateral response of the column. The column model has been implemented in OpenSees and validated using data from column tests representing a broad range of design parameters typical of older reinforced concrete frames.
- 出版日期2013-10-3
