焊接桁架节点板应力的有限元分析

在工程实际中桁架杆件以角钢、槽钢、工字钢以及冷弯薄壁型钢为主,为了使桁架的节点连接更加可靠,在大多数情况下采用节点板的形式。由于桁架中节点板受力复杂,影响因素很多,由节点设计引起的安全事故比例很高,因此节点板受力性能的分析及节点板设计非常重要,而现行设计规范没有明确给出钢桁架节点板的设计方法。对于桁架尤其是大型桁架的设计,在满足整体承载能力的条件下,必须使节点板的设计满足整体的强度要求。研究针对几种不同截面的杆件对节点进行有限元分析,再结合有关工艺和规范,为工程实际中合理的节点设计提供依据。

Finite Element Analysis of Welding Truss Gusset Plate Stress

In engineering practices,the truss rod pieces mainly are angle steel,box steel,I-steel and cold-formed thin-walled steel and in order to make the j oint conj unction of truss more reliable,the form of gus-set plate will be adopted in most cases.Due to the stress of gusset plate in truss is complicated it will be af-fect by many influence factors,the ratio of safety accidents caused by j oint design is very high,so the analy-sis of mechanical property and the design of gusset plate are very important,but the current design specifi-cations have not proposed the specific design procedure of steel truss gusset plate.As for the design of truss,particularly the large-scale truss,the design of gusset plate must meet the overall strength require-ment under the condition of meeting the overall carrying capacity.This paper targets at rod pieces with sev-eral different section to conduct finite element analysis,then combine with relevant process and specifica-tions to provide a basis for reasonable j oint design in engineering practices.