一、概述框架梁中钢筋伸入节点时,常因锚固长度不足而需弯入柱内,成为直角弯折钢筋。对直胸弯折钢筋锚固性能的研究是钢筋砼结构粘结问题中的一个重要课题。为探索其锚固力的构成、受力特征、滑移过程、裂缝发展和破坏形态,进行了32个拟构件和2个梁柱节点的一次单调加载和低周反复加载试 1. Overview When the steel bars in the frame extend into the joints, they often need to be bent into the columns due to the lack of anchorage length and become right-angle bending bars. The research on the anchorage performance of straight-breasted bending steel bars is an important issue in the bonding of reinforced concrete structures. In order to explore the composition, force characteristics, slip process, crack development and failure modes of its anchorage force, a monotonic loading and low-cycle repetitive loading test of 32 pseudo-members and 2 beam-column nodes were carried out.