Abstract

The seismic performance of an improved column-to-column connection in the precast concrete frame is studied in this article, including five precast specimens and one cast-in-place specimen. The traditional reinforced concrete tenon connection of precast concrete frame columns is replaced by the concrete-filled steel tubular tenon. The welding or cold extrusion sleeve connection of the column longitudinal bars is replaced by rolling straight thread sleeve connection. The six-frame column specimens were fabricated and tested subjected to low-reversed cyclic loading. Efforts have been made to study the characteristics of an improved tenon column joints, such as the failure mode, the hysteretic curves, the skeleton curves, the stiffness degradation, the ductility, and the energy dissipation. The test results show that the seismic performance of the precast columns with the suggested tenon connection is similar to that of the cast-in-place columns.

摘要

本文研究了预制混凝土框架中改进的柱与柱连接的抗震性能，包括5个预制试件和1个现浇试件。预制混凝土框架柱的传统钢筋混凝土榫头连接由钢管混凝土榫头代替。柱纵筋的焊接或冷挤压套筒连接改为滚压直螺纹套筒连接。在低反向循环载荷下制造和测试六框架柱试样。研究了改进榫柱节点的失效模式、滞回曲线、骨架曲线、刚度退化、延性和能量耗散等特性。