To design a component,the first step is to determine approximate span/depth ratio. The L/d ratio will depend upon the material(concrete,steel), the loading, the sectional shape(I,H,T,L), the support conditions(simple,continue)
To design a component, the first step is to determine approximate span/depth ratio. The L/d ratio will depend upon - the material(concrete, steel), - the loading, - the sectional shape(I,H,T,L), - the support conditions(simple, continue)
B-1 水平分体系及简支构件的近似跨高比·，® 跨度0 最大值 跨度心 最大值 平均 值 (英尺) (英尺) 【,木结构： 主梁 12 16 20-一60 整合木 5 % 35 门式框架 24 30 40-80 术板 28 2-6 拱（跨度/拱高）， 8 12 (拱60一150) 次 22 26 10-一25 空腹桁架 梁 16 20 15~30 拱（跨度/拱厚） 30 % 主架 12 2035 商形薄壳屋盖 门式摇架 26 0 30~50 (可能由最小厚 桁架 4 8 30~100 度控制) 1,工学形梁及次粱 18 架24，次梁25 15-60 纵向時度/矢高 12 15 50-70 板和工字形主桑 14 9 40100 横向跨度/壳厚 50 60 12-30 桁乘 12 分 40-80 N,预应力混凝土 门式框乘 30 40 50-120 实心板（单向或 40 44 20~35 拱（畸度/拱高） 8 16 80-200 双向) (跨度/拱厚) 40 50 有柱帽的板或支 44 48 35-45 悬索（跨度/高） o 15 150300 承在聚上的双向板 拉常结构 6 10 150-300 双向密动板 型 电 35-70 I.钢皓灌凝土： (跨度为2~10英尺的压型钢 空心板 36 AO 30-60 板上的现浇混鞭土板取25) 次聚 32 36 40-一60 实心板（单向或 28 32 10-25 桑 24 28 30~80 夏向) 主果 0 品 40-120 有柱帽的板 简形薄壳屋整 (或支承在梁上 喝 36 20-35 的双向板) (可能由最小厚 双向密肋板 20 安 30-40 度控制) 次粱 22 26 2545 纵向跨度/矢高 15 吧 (60~120) 16 20 15~40 横向跨度/壳厚 60 名 15~35 0暴臂梁的跨高比和跨度，取表中值的1/3， @两粱固定的次梁、爨和主梁，跨高比可增加10%， 371
8.2.Moment Diagrams The second step of designing a component is to get a more accurate dimensioning. It will be necessary to compute the maximum bending moment and shear force in a component according to its moment and shear diagrams
8.2. Moment Diagrams The second step of designing a component is to get a more accurate dimensioning. It will be necessary to compute the maximum bending moment and shear force in a component according to its moment and shear diagrams
PARABOLA 8 12 wL 12 LIZED) 24 DUE TO FIXED SUPPORT E AREAS=O wl2 12 Fig.8-4 Moment curves OFFSET LESS THAN FOR (b) DUE TO ADJACENT MEMBER wL3 业业 不wL DUE TO ADJACENT MEMBER 16uL3 12
Fig. 8-4 Moment curves
For a continuous beam analysis under living loading,the moment envelope considers the two extreme loading conditions with the end moment wL2/12 and the mid-span moment wL2/16
For a continuous beam analysis under living loading, the moment envelope considers the two extreme loading conditions with the end moment wL²/12 and the mid-span moment wL²/16