梯形钢屋架课程设计I目录一、设计资料...................................................................................................................................1二、荷载与内力计算.......................................................................................................................11、荷载计算.............................................................................................................................12、荷载组合.............................................................................................................................13、内力计算.............................................................................................................................2三、杆件截面设计...........................................................................................................................21．上弦杆.................................................................................................................................22．下弦杆.................................................................................................................................43．端斜杆aB...........................................................................................................................54．再分式腹杆eg-gK.............................................................................................................65．竖腹杆Ie............................................................................................................................7四、节点设计.................................................................................................................................111．下弦节点“b”.................................................................................................................112．上弦节点“B”.................................................................................................................133．有工地拼接的下弦节点“f”.........................................................................................154．屋脊节点“K”.................................................................................................................175．支座节点“a”.................................................................................................................19五、填板设计.................................................................................................................................25六、材料表.....................................................................................................................................26附表................................................................................................................................................28梯形钢屋架课程设计1一、设计资料1、屋架铰支于钢筋混凝土柱顶，混凝土标号C25；2、车间柱网布置：柱距9m；跨度L=20m；3、上弦平面侧向支撑间距为两倍节间长度，下弦平面在柱顶和跨中各设一道纵向系杆；4、屋面坡度1:10；5、钢材采用Q235B钢，焊条为E43XX系列，手工焊;6、屋面荷载标准值见表1表1荷载标准值7、屋架计算跨度：020.152020.1519.7mlL，屋架形式和几何尺寸如图1所示。图1屋架形式及几何尺寸二、荷载与内力计算1、荷载组合由永久荷载起控制作用：21.353.0641.40.70.51.40.915.8864/KNm由可变荷载起控制作用：21.23.0641.411.40.70.55.5668/KNm3、内力组合设计屋架时，应考虑以下三种组合：（1）组合一：全...
