锅炉钢构架中梁柱刚性接点设计的几点探讨

目前锅炉钢构架中梁柱的刚性连接形式大部分采用梁腹板以螺栓连接,梁翼缘板采用全焊透的形式连接与柱的传统的连接形式,本文以H型钢为研究对象,通过对这种传统的梁柱连接及其它共四种不同的连接形式进行非线性有限元分析,研究其分析结果,总结规律,从而提出了新的梁柱刚性连接节点的设计思想,即在梁柱连接区梁端采取扩大翼缘板宽度,同时柱端增加加强筋,这样就避免了在连接焊缝区域产生应力集中的现象,使因应力过大而产生的塑性铰远离连接区,从而大大提高了节点的承载性能。这一思想值得其他从事锅炉刚构架的设计人员参考应用和推广。

Study on Beam-to-Column Rigidity Connection Design of Boiler Steel Structure

In the present boiler steel structure design,beamto-column rigidity connection mostly use web-bolted and flange-welded connection.This paper introduces study on the H section steel,according to research differences between beam-to-column traditional connection and other four different connections,study the result of analyse and sum up regularity,thereby offer a new designing ideas about the connection of beam-to-column rigidity.It is that add the width of the beam limb at beam end and add strengthen bone at the column.In this way,it can avoids stress concentration at the area of welding line and makes plastic hinge far out of linking section,so greatly improve the joint load capacity.This design is worthwhile to application and extension for the designer that work on the boiler steel frame design.