国家体育场（鸟巢）钢结构工程焊接应力应变控制技术探讨北京****钢结构工程有限公司二 00 五年三月目 录目 录一、工程概况...........................................................21.钢结构设计重量.......................................................32.钢材型号厚度.........................................................33.钢材性能.............................................................4二、工程特点...........................................................41.工程规模大，构件吨位重...............................................42.节点复杂.............................................................53.施工难度大...........................................................54.工期要求紧...........................................................6三、施工方案简介.......................................................6四、难点分析..........................................................10五、钢结构焊接变形及残余应力的分析与对策..............................111.焊接变形与残余应力的基础分析........................................11六、焊接工艺评定......................................................131.国家体育场（鸟巢）焊接技术归类表（计划 1）...........................132.工艺评定（应有的部份）..............................................13七、焊接坡口形式与尺寸................................................151、坡口形式与尺寸.....................................................152、焊材匹配与选用.....................................................16八、焊接顺序..........................................................171、焊接工程的总体思路.................................................172、主结构焊接的指导思想...............................................17九、超高强钢特厚板焊接技术............................................21十、层状撕裂问题分析..................................................23十一、铸钢件焊接技术..................................................24十二、科技创新及攻关..................................................24一、工程概况国家...
