【摘要】 本文系“焊接桥梁的研究”专题的部分工作成果。我国国产16锰低合金钢相当于外国St.52号钢。它具有比普通炭素钢高1/3——1/2的强度和良好的焊接性能,而价格比其他任何低合金钢都低很多。因此,为了大量节约钢材和贯彻多、快、、好、省总路线的方针,在我国采用16锰低合金钢的焊接桥梁,具有重大的经济意义和远大的发展前途。本文所述是对两根16锰钢焊接梁的动静载的试验研究。用电阻应变仪和千分表测得应力和挠度;用脉冲机进行脉冲疲劳试验;最后还进行了破坏试验。试验结果证明16锰低合金钢确适合作铁路焊接桥梁,能承受重型动力荷载;我们的桥梁工厂焊接质量亦属满意。更多还原

【Abstract】 This paper gives the results of part of the work entitleed "Research of WeldedSteel Bridges." 16Mn Steel, being equivalent to St. 52, has much higher strength than ordinarymild steel and has good quality for Welding. The price of this kind of low alloysteel is much lower than that of any other alloy steel. Therefore, the use of 16Mn steel for welded bridges is expected to have bright future in this country forgeat economy. Static and dynamic tests were carried out on two welded girders made of 16Mn steel. The stresses were measured by means of electrical resistance wire st-rain gauges and the deflections were measured by dial gages. The dynamic (fatique)tests were carried out with the use of pulsators. In the end, the girders were te-sted to failure. The results of these tosts show that 16Mn steel is suitable for we-lded raiiway byidges, capable of sustaining heavy dynamic Ioading, and the qualityof our shop welding is satisfactory.更多还原