钢管塔十字节点板强度理论与试验研究

摘要

针对一种适用于大型钢管塔的十字插板连接形式,阐述了其节点板的受力特点,对十字节点板的破坏模式及计算理论进行了系统分析.为考察节点板的受力性能、破坏模式及极限承载力,以榕江大跨越塔工程为背景,进行了2个大尺寸缩尺模型的静力试验.对试验模型进行了有限元非线性数值分析,试验结果与有限元分析结果一致性很好,两方面的分析结果均表明:该十字节点板构造合理、安全可靠,可用于实际工程.结合试验研究和有限元参数分析结果,提出了该十字节点板的破坏模式,给出了相应的计算理论和极限承载力计算公式,提出了用于实际工程的设计建议公式.%The paper presents a kind of cross gusset plate used in steel tube towers. The advantages of this gusset plate are illustrated, the failure mode and design theory of the gusset plate are analyzed. In order to investigate the performance, failure pattern and ultimate capacity of the gusset plate,Monotonic axial loaded tests have been carried out on two large-scale specimens used in Rongjiang steel tube tower. Nonlinear analysis simulating the static behavior is conducted by utilizing the general - purpose finite element(FE) package ANSYS. Both experimental and FE analytical results show that the gusset plate possesses excellent mechanical performance and can be used in engineering. Lastly, according to the results of tests and FE parameters analyses, the failure mode and design theory of the gusset plate are proposed, the formula of ultimate capacity are recommended.