With frequent occurrence of all kinds of terrorism attack around the world,engineers begin to realize that improvement of anti-blast of structural members can effectively prevent structure from integral collapse under blast loading and spare more time for people to escape.Studies are made of the mechanical performance of three simple supported RC-Beams with few-stirrups under blast loading through experiments and analyses are made of their crack development,strain and deflection change.Results show that the beams begin to fail from the weak part and their anti-blast can be effectly enhanced by increasing strength of concrete,enlarging Stirrup Ratio,and especially by reducing stirrup spacing of the two bottoms.

介绍了新材料0Cr17Ni4Cu4Nb手工钨极氩弧焊,对试验结果分析,得到了较好的焊接工艺,顺利完成了叶片的焊接。