The features of calculation of curvilinear trusses and the comparison steel grades ВСТ4ПС4 and 16G2AF
Abstract
The features of calculation of curvilinear trusses and the comparison steel grades ВСТ4ПС4 and 16G2AF
Incoming article date: 02.05.2018"he article gives a technical and economic comparison of the calculation results for two grades of steel VSt3ps4 and 16G2AF. The features of steel grades are analyzed. The comparison of the weight and cost of belts of curved rafter trusses is given. The results show that the use of increased strength in the steel structures under investigation is not only less metal-consuming, but also more economical. Despite the fact that the cost of 16G2AF steel pipes is 25% higher than the cost of Bst3pc4 steel pipes, a total cost saving of belts of 28% was obtained. This is explained by the significantly lower weight of belts made of 16G2AF steel. This research is relevant in that the result of the work done demonstrates which mark has become more appropriate to choose for large span farms in the design. The above engineering calculations confirm that the use of steel 16G2AF for metal curvilinear trusses, 48m flight is more economically advantageous. The weight of the belts for 16G2AF steel is almost half that of VST3PS4. As a result, the analysis of the performed calculations allows us to draw the following conclusions: Due to the fact that the design resistance Ry of steel 16G2AF is 67% higher than the design resistance of steel VSt3ps4, the metal savings due to the reduction of the cross-sectional area of the belts in the amount of 47% were obtained.
Keywords: curved truss, technical and economic comparison, steel grade, high-strength steel