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页数:20页
时间:2018-12-15
《梁板柱配筋计算书》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、截面设计本工程框架抗震等级为三级。根据延性框架设计准则,截面设计时,应按照“强柱弱梁”、“强剪弱弯”原则,对内力进行调整。框架梁框架梁正截面设计非抗震设计时,框架梁正截面受弯承载力为:(9-1-1)抗震设计时,框架梁正截面受弯承载力为:(9-1-2)因此,可直接比较竖向荷载作用下弯矩组合值M和水平地震作用下弯矩组合值M乘以抗震承载力调整系数后gRE的大小,取较大值作为框架梁截面弯矩设计值。即(9-1-3)比较39和表43中的梁端负弯矩,可知,各跨梁端负弯矩均由水平地震作用控制。故表39中弯矩设计值来源于表43,且为乘以后的值。进行正截面承载力计算时
2、,支座截面按矩形截面计算;跨中截面按T形截面计算。T形截面的翼缘计算宽度应按下列情况的最小值取用。AB跨及CD跨:=7.5/3=2.5m;,故取=1.86m判别各跨中截面属于哪一类T型截面:一排钢筋取=700-40=660mm,两排钢筋取=700-65=635mm,则=14.3×1860×130×(660-130/2)=2057.36kN.m该值大于跨中截面弯矩设计值,故各跨跨中截面均属于第一类T形截面。BC跨:=3.0/3=1.0m;=0.3+8.4-0.3=8.4m;;,故取=1m判别各跨中截面属于哪一类T型截面:取=550-40=510mm,
3、则=14.3×1000×130×(510-130/2)=827.26kN.m该值大于跨中截面弯矩设计值,故各跨跨中截面均属于第一类T形截面。各层各跨框架梁纵筋配筋计算详见表49及表50。表格49各层各跨框架梁上部纵筋配筋计算层号AB跨BC跨CD跨-MABz-MABy-MBCz-MBCy-MCDz-MCDy4负弯矩M(kN·m)-213.6-181.8-188.86-188.86-181.18-213.60.1140.0970.1010.1010.0970.1140.1210.1020.1070.1070.1020.1210.9710.9490.94
4、70.9470.9490.971配筋As()925.84803.52839.35839.35803.52925.84实配钢筋3C203C203C203C203负弯矩M(kN·m)-370.84-319.2-347.48-347.48-319.92-370.84续表49层号AB跨BC跨CD跨-MABz-MABy-MBCz-MBCy-MCDz-MCDy30.1980.1710.1860.1860.1710.1980.2230.1890.2080.2080.1890.2230.8880.9060.8960.8960.9060.888配筋As()1757.
5、631486.61632.211632.211486.161757.63实配钢筋4C254C254C254C252负弯矩M(kN·m)-452.60-445.3-500.02-500.02-445.63-452.600.2600.2580.2890.2890.2580.2620.3100.3040.350.350.3040.310.8450.8480.8250.8250.8480.845配筋As()2343.052298.12651.292651.292298.812343.05实配钢筋4C25+2C204C25+2C224C25+2C224C25
6、+2C201负弯矩M(kN·m)-610-491.9-557.04-557.04-491.69-6100.3530.2840.3220.3220.2840.3530.4580.3430.4030.4030.3430.4580.7710.8290.7980.7980.8290.771配筋As()3460.982594.43053.5630530562594.543460.98实配钢筋4C25+4C224C25+4C204C25+4C204C25+4C22表格50各层各跨框架梁下部纵筋配筋计算层号AB跨BC跨CD跨MABzMAByMAB中MBCzMBC
7、yMCDzMCDyMCD中4正弯矩M(kN·m)113.5342.92196.2778.3978.3942.92113.53196.270.0610.0230.1050.070.070.0230.0610.1050.0630.0230.1110.0730.0730.0230.0630.1110.9680.9880.9440.9620.9620.9880.9680.944配筋As(mm2)493.62182.83875.06443.83443.83182.83493.62875.06实配钢筋3C203C183C203正弯矩M(kN·m)212.591
8、47.58253.44218.57218.57147.58212.59253.440.1140.0790.1360.196
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