用影响线解钢结构

• 作 者: 堀太郎 宫本智
• 机 构: 天津起重设备厂
• 出 处: 起重运输机械
• 发表日期: 1974年Z1期
• 关键词: 影响线 下弦杆 截面法 移动载荷 上弦杆 变化方式 跨中弯矩 斜杆 单位载荷 Ritter

求桁架杆件内力的方法有图解法、书点法、利塔(Ritter氏)截面法、影响线法等多种方法。但在求由于移动载荷产生的杆件最大内力时,用影响线法最为方便。各个杆件由于移动载荷的位置不同,内力应该是变化的,影响线就是表明这种变化方式的。上弦杆和下弦杆的内力虽然也随着移动载荷的位置在变化着,但上弦杆经常受压,下弦杆经常受拉。

Seeking truss member internal force methods include graphic method, book point method, Rita’s (Ritter’s) section method, the impact of line method and other methods. But when seeking the maximum internal force of the rod due to moving load, it is most convenient to use the influence line method. Each rod due to the location of the moving load, the internal force should be changed, the impact of the line is that this change in the way. Although the internal force of the upper chord and the lower chord varies with the position of the moving load, the chord is often stressed and the chord is often tensioned.