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二、焊缝长度的计算方法梭形屋架的节点除端节点与一般屋架相同外,其余均无节点板,它们可分成三类(图6)。焊缝的有效厚度hu按钢结构设计规范(5)第8章的规定计算,焊缝长度为l_5。现将节点1、2及3焊缝长度计算方法的推演过程分述于后。节点1 用于正三角形屋架时,角钢背与地面呈45°。为了便于说明,将角钢背平行地面。杆件内力s分解为s_1、s_2(图7)。s_2再分解为s_3、s_4(图8)。s_1、s_3、s_4为三个相互垂直的力(图
Second, the weld length calculation method Spindle roof node except for the same end and the common roof, the rest are no node board, they can be divided into three categories (Figure 6). The effective thickness of the weld hu according to the steel structure design specification (5) Chapter 8 of the provisions of the calculation, the weld length l_5. Now the node 1, 2 and 3 weld length calculation method of deduction is described later. When node 1 is used for a positive triangle truss, the angle steel back is 45 ° to the ground. For ease of explanation, the angle steel back parallel to the ground. The internal force of the rod is decomposed into s_1 and s_2 (Figure 7). s_2 is decomposed into s_3, s_4 (Figure 8). s_1, s_3, s_4 are three mutually perpendicular forces (Fig