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力学与工程学院
《钢结构》
课程设计计算书
题 目 梯形钢屋架 班 级 工力12—2 姓 名 李凤飞、孙洪涛、孙瑞锋、惠娇娇、肇启明 指导教师 高菲 __ 成 绩 ___________
目录
1、设计资料·······························································01
2、屋架形式与布置························································01
2.1屋架的形式与几何尺寸················································01
2.2屋架的支撑布置······················································02
3、荷载计算及荷载组合···················································03
3.1 荷载计算·························································03
3.2 荷载组合·························································03
4、内力计算及内力组合····················································06
5、桁架杆件设计··························································06
6、节点设计·······························································25
6.1下弦节点“b”························································25
6.2 上弦节点“B”·······················································27
6.3 屋脊节点“K”·······················································29
6.4 支座节点“a”························································30
参考文献··································································35
附录1 内力表···························································
梯形钢屋架设计
1、设计资料
某车间如图1所示，跨度按附表选取，柱距为6m，厂房总长度为90m，车间内设有一台50t、一台20t中级工作制软钩桥式吊车，冬季室外最低温度-20度，屋面采用1.5m x 6.0m预应力大型屋面板，屋面坡度为i=1:10，上铺泡沫混凝土保温层和二毡三油防水层，屋面活荷载标准值0.7 Kn/m2,雪荷载标准值0.5 Kn/m2，积灰荷载标准值按附表选取，桁架采用梯形钢桁架，其两端铰支于钢筋混凝土柱上，上柱截面尺寸450 mm x 450mm,混凝土强度等级为C25.钢材采用Q235B级，焊条E43型，手工焊。
屋面基本资料：
屋面均布活荷载标准值0.7 Kn/m2
雪荷载标准值0.5 Kn/m2
积灰荷载标准值___0.6___Kn/m2(按组号选取)
桁架计算跨度：l0=30-2*0.15=29.7 m
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