大直径双钢筋受弯构件刚度实验研究

Experimental Research on the Rigidity of Big Diameter Bi-steel Flexural Members

总结了近年来双钢筋技术的应用情况 ,提出了开发大直径双钢筋技术的设想 .通过对不同梯格尺寸双钢筋试验梁的工作特性研究 ,确定了用冷拉螺纹钢筋制作双钢筋的合理梯格尺寸及加工工艺参数 ,并对用ΦL1 2钢筋制作的双钢筋受弯构件的刚度进行了实验研究 ,提出了大直径双钢筋受弯构件的刚度及裂缝计算公式 .

This paper summarizes the application of bi steel technology in recent years and presents the suggestion of developing bi steel technology.According to the research into working features of bi steel experimental beams of variant ladder frame,the author sets the rational ladder frame size and processing technology parameters of bi steel making in cold drawing deformed steel bars.The rigidity of bi steel flexural members mede of Φ L 12 steel has been tested and studied and then the author presents the formula of rigidity and cracking of big diameter bi steel flexural members.