摘要
考虑到巨型箱型柱截面净尺寸大、壁厚、组装隔板多等特点,施工时需控制局部变形及整体变形,以保证构件几何尺寸精度。运用有限元软件,结合117大厦地下室核心巨柱焊接实例,对箱型柱80mm超厚板的焊接温度场及应力场进行动态模拟。计算结果表明:焊接热源的影响区域仅限于焊缝附近区域,而远离焊缝的区域基本维持在室温状态;随着焊接热源的移动,焊缝区域逐步达到屈服状态而发生塑性变形,但钢材仅发生弹性变形;简化模型的周边最大位移在毫米的数量级上,一定程度上可以认为焊接对与模型相连的构件的影响很小。
Considering great size of huge box column net section, thick wall, many of assembly diaphragm , and in order to ensure component geometry accuracy ,when constructing, it needs to control local deformation and overall deformation. Using the finite element software, combined with 117 building basement core giant column welding example, it was simulated dynamically the welding temperature field and stress field of the box column 80 mm super thick plate, and the results shows the influence of welding heat source area was limited to the area nearby the weld, and away from the weld area maintained stately at room temperature. With the movement of the welding heat source, the weld area gradually achieve the yield condition and produced plastic deformation, but the steel occurred only elastic deformation. The maximal displacement of the simplified model surrounding was in the order of magnitude of one mm, and to a certain extent the welding has little impact with model connected component.
出处
《钢结构》
2013年第7期63-66,59,共5页
Steel Construction
关键词
局部变形
超厚板
温度场
屈服
塑性变形
local deformation
super thick plate
welding temperature field
yield condition
plastic deformation
