Shear stress transfer model for evaluating the fracture behaviour of SHCCs for RC shear strengthening

作者：Yongxing Zhang, Hui Peng, Weihua Lv · 发表于：Magazine of Concrete Research · 年份：2017 · DOI：10.1680/jmacr.17.00104 · 被引用次数：10 · 研究领域：Innovative concrete reinforcement materials、Structural Behavior of Reinforced Concrete、Concrete and Cement Materials Research

This paper presents a numerical shear stress transfer model for investigating the shear fracture behaviour of strain-hardening cementitious composites (SHCCs) for strengthening reinforced concrete (RC) structures. The model focuses on the transferred shear stress on the crack surface of the SHCC, taking account of the contributions from both the contact stress of the matrix and the bridging stress of the fibres. The numerical results demonstrate that the proposed shear stress transfer model can appropriately evaluate the shear fracture behaviour of SHCCs for RC strengthening, in which the fibre bridging effect on the crack surface of the SHCC has much influence on the shear fracture behaviour of the SHCC strengthening layer.