.
跨中验算
已知b?h?250mm?500mm，c?20mm，ftk?1.54N/mm2 ?lim?0.2mm
2Mmax?75.18kN?m,As?1232mm(2?28)，bf?1960mm，hf?150mm。则h0?500?35?465mm。
Ate?0.5bh?(bf?b)hf
?0.5?250?500?(19600?250)?150 ?281500mm2
A?te?S?1230/281500?0.0065?0.01，取.0.01 Atedeq??nid2i?nidi?28 vi?1.0
Mk75.18?106 ?s???151N/mm2
0.87hoAs0.87?465?1230f0.65?1.54 ??1.1?0.65tk?1.1??0.437
?te?s0.01?151?max??cr??sEs(1.9cs?0.08dep?te)
?2.1?0.476?151200?103 ?0.181??lim?0.2 满足要求
支座处裂缝验算
已知b?h?250mm?500mm，c?20mm，ftk?1.54N/mm2，
2Mmax?105.2kN?m,?lim?0.2mm,As?1610mm(2?25?2?20)则ho?465mm Ate?0.5bh?0.5?250?500?62500
?(1.9?20?0.08?28) 0.01
?te?deqAS?610/62500?0.026 Ate?nid2252?202i???22.8 vi?1.0 ?nidi25?20Mk105.2?106 ?s???161N/mm2
0.87hoAs0.87?465?1660 ??1.1?0.65ftk?te?sEs?1.1?0.65?1.54?0.86
0.026?161dep?max??cr??s(1.9cs?0.08?te)
?2.1?0.86?161200?103 ?0.16??lim?0.2 满足要求 （4）梁挠度变形验算 跨中挠度
已知：ftk?1.54N/mm2，ES?200?103N/mm2，Ec?2.55?104N/mm2，
?(1.9?20?0.08?22.8) 0.026?E.
ES200?103，AS?1232mm2(2?28)，??2 ，h0?465mm,C?20mm ???7.8EC2.55?104塔里木大学混凝土结构课程设计
AS1231??0.0101， bh0 300?565
??0.437???f?'(bf'?b)hf'bh0??1960?300??150?24
250?465
ESASh02200?103?1230?4652BS???7.6?10136?E?6?7.8?0.011.5?0.437?0.2?1.15??0.2?1?3.5?241?3.5?f'BS7.6?1013B???3.8?1013
?22l05MKl0575.18?106?58802af????7mm??29.4mm符合要求。
48B482008?1013支座挠度
已知：ftk?1.54N/mm2，ES?200?103N/mm2，Ec?2.55?104N/mm2，
C?20mmAS?1610mm2(2?25?2?20)，??2 ，h0?465mm ，Mmax?105.2kN/m。
A1610??S??0.0138，
bh0250?465??0.86ESASh02200?103?1660?4652BS???3.8?10136?E?1.5?0.86?0.2?6?7.8?0.01381.15??0.2?1?3.5?f'3.8?1013B???1.9?1013
?22l05MKl05105.2?106?58802af????20mm??29.4mm符合要求。 1348B482001.9?10
BS
7柱的验算
（1）中柱的荷载计算：
长边梁的传递荷载： （27.06+36×0.4）×3.93+4.33×6.93=193 kN 短边梁的传递荷载： （27.06+36×0.4）×5.88×0.5+3.61×5.88=143 kN 柱的自重： 4×0.4×0.4×25=16 kN 柱的抹灰： 4×0.015×0.4×4×17=1.6 kN N1=353.6 kN （2）柱的挠度验算
已知b?h?400mm?400mm，c?20mm，ftk?1.54N/mm2，N?353.6kN，
?lim?0.2mm,As?1385mm2(9?14)则ho?370mm Ate?0.5bh?0.5?400?400?80000
?te?deqAS?1385/800000?0.017 Ate?nid2i??14 vi?1.0 ?nidi22
.
e??se0?ys?h400?as??30?170mm 22h??z??0.87?0.12(1??f)(0)2?h0?111.6
e??Nk(e?z)353.6?103?(170?111.6) ?s???133.5N/mm2
Asz1385?111.6 ??1.1?0.65ftk?te?s?1.1?0.65?1.54?0.56
0.017?133.5dep?max??cr??sEs(1.9cs?0.08?te)
?2.1?0.66?133.5200?103 ?0.0966??lim?0.2 满足要求
?(1.9?20?0.08?14) 0.017.
混凝土结构双向板设计
