跨江大桥主墩现浇支架牛腿设置技术方案

1、二广黄田绥江大桥主墩现浇支架牛腿设置方案在C30盖梁两侧各预埋5块440×415×20mm的A3钢板，在钢板上设置锚板和锚固钢筋。现针对 “牛腿应检算牛腿附近局部抗拉、抗压强度等并采用有限元复核牛腿附近混凝土受力情况，是否造成局部混凝土破坏。”我单位利用midas软件进行了有限元分析计算。计算说明如下：a) 因为要检算混凝土的下边缘压应力（见应力表中的Cb3(+y-z)和Cb4(-y-z)），所以在建立模型时将牛腿按预埋锚板的截面尺寸简化为同截面钢柱，检算结果不影响混凝土的压应力。b) 牛腿外加力值按计算单中的横梁支点反力最大值值定故。为了软件分析方便、安全，所有的牛腿荷载

2、力都按此力分布。c) 预埋件锚筋要通长布置，并加设箍筋进行加强，箍筋的布置按构造筋布置；锚板下缘加钢筋网进行加强。d) 软件计算毕竟是理想状态控制，实际加载、施工中必须随时观测牛腿处的变化，有异常情况随时处理。e) 模型单元中的牛腿最不利截面为1j-35i，3j-36i，7j-24j（跨中），18j-38i，20j-37i。f) 应力表中，涂成黄色的数据属于牛腿最不利截面处的应力。g) 牛腿焊缝必须严格把关。将应力表转化为excel表，详见如下：应力表单元荷载位置Cb(min/max) (kPa)Cb1(-y+z) (kPa)Cb2(+y+z) (kPa)Cb3(+y-z) (kPa)Cb4(

3、-y-z) (kPa)1自重I230.00E+000.00E+000.00E+000.00E+000.00E+001自重J38-4.28E+004.28E+004.28E+00-4.28E+00-4.28E+002自重I24-7.20E+026.46E+026.46E+02-7.20E+02-7.20E+022自重J25-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+023自重I25-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+023自重J39-8.16E+01-8.16E+01-8.16E+017.80E+007.80E+

4、004自重I26-1.69E+02-1.69E+02-1.69E+029.48E+019.48E+014自重J27-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+025自重I27-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+025自重J28-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+026自重I28-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+026自重J29-5.96E+02-5.96E+02-5.96E+025.22E+025.22E+027自重I

5、29-5.96E+02-5.96E+02-5.96E+025.22E+025.22E+027自重J30-6.38E+02-6.38E+02-6.38E+025.64E+025.64E+028自重I21-5.87E+02-5.87E+02-1.68E+022.50E+02-1.68E+028自重J19-9.18E+02-9.18E+02-2.67E+023.84E+02-2.67E+029自重I19-9.18E+02-9.18E+02-2.67E+023.84E+02-2.67E+029自重J17-8.17E+02-8.17E+02-2.80E+022.58E+02-2.80E+0210自重I1

6、7-8.17E+02-8.17E+02-2.80E+022.58E+02-2.80E+0210自重J15-7.16E+02-7.16E+02-2.92E+021.32E+02-2.92E+0211自重I15-7.16E+02-7.16E+02-2.92E+021.32E+02-2.92E+0211自重J13-6.15E+02-6.15E+02-3.05E+025.77E+00-3.05E+0212自重I13-6.15E+02-6.15E+02-3.05E+025.77E+00-3.05E+0212自重J11-5.14E+02-5.14E+02-3.17E+02-1.20E+02-3.17E+0

7、213自重I11-5.14E+02-5.14E+02-3.17E+02-1.20E+02-3.17E+0213自重J9-4.13E+02-4.13E+02-3.30E+02-2.46E+02-3.30E+0214自重I9-4.13E+02-4.13E+02-3.30E+02-2.46E+02-3.30E+0214自重J7-3.72E+02-3.12E+02-3.42E+02-3.72E+02-3.42E+0215自重I7-3.72E+02-3.12E+02-3.42E+02-3.72E+02-3.42E+0215自重J5-4.98E+02-2.11E+02-3.55E+02-4.98E+02-

8、3.55E+0216自重I5-4.98E+02-2.11E+02-3.55E+02-4.98E+02-3.55E+0216自重J3-6.24E+02-1.11E+02-3.67E+02-6.24E+02-3.67E+0217自重I3-6.24E+02-1.11E+02-3.67E+02-6.24E+02-3.67E+0217自重J1-7.50E+02-9.57E+00-3.80E+02-7.50E+02-3.80E+0218自重I370.00E+000.00E+000.00E+000.00E+000.00E+0018自重J41-4.28E+004.28E+004.28E+00-4.28E+00

9、-4.28E+0019自重I36-7.20E+026.46E+026.46E+02-7.20E+02-7.20E+0219自重J35-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+02单元荷载位置Cb(min/max) (kPa)Cb1(-y+z) (kPa)Cb2(+y+z) (kPa)Cb3(+y-z) (kPa)Cb4(-y-z) (kPa)20自重I35-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+0220自重J40-8.16E+01-8.16E+01-8.16E+017.80E+007.80E+0021自重I34-

10、1.69E+02-1.69E+02-1.69E+029.48E+019.48E+0121自重J33-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+0222自重I33-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+0222自重J32-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+0223自重I32-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+0223自重J31-5.96E+02-5.96E+02-5.96E+025.22E+025.22E+0224自重I31-

11、5.96E+02-5.96E+02-5.96E+025.22E+025.22E+0224自重J30-6.38E+02-6.38E+02-6.38E+025.64E+025.64E+0225自重I22-5.87E+022.50E+02-1.68E+02-5.87E+02-1.68E+0225自重J20-9.18E+023.84E+02-2.67E+02-9.18E+02-2.67E+0226自重I20-9.18E+023.84E+02-2.67E+02-9.18E+02-2.67E+0226自重J18-8.17E+022.58E+02-2.80E+02-8.17E+02-2.80E+0227自重

12、I18-8.17E+022.58E+02-2.80E+02-8.17E+02-2.80E+0227自重J16-7.16E+021.32E+02-2.92E+02-7.16E+02-2.92E+0228自重I16-7.16E+021.32E+02-2.92E+02-7.16E+02-2.92E+0228自重J14-6.15E+025.77E+00-3.05E+02-6.15E+02-3.05E+0229自重I14-6.15E+025.77E+00-3.05E+02-6.15E+02-3.05E+0229自重J12-5.14E+02-1.20E+02-3.17E+02-5.14E+02-3.17E

13、+0230自重I12-5.14E+02-1.20E+02-3.17E+02-5.14E+02-3.17E+0230自重J10-4.13E+02-2.46E+02-3.30E+02-4.13E+02-3.30E+0231自重I10-4.13E+02-2.46E+02-3.30E+02-4.13E+02-3.30E+0231自重J8-3.72E+02-3.72E+02-3.42E+02-3.12E+02-3.42E+0232自重I8-3.72E+02-3.72E+02-3.42E+02-3.12E+02-3.42E+0232自重J6-4.98E+02-4.98E+02-3.55E+02-2.11E

14、+02-3.55E+0233自重I6-4.98E+02-4.98E+02-3.55E+02-2.11E+02-3.55E+0233自重J4-6.24E+02-6.24E+02-3.67E+02-1.11E+02-3.67E+0234自重I4-6.24E+02-6.24E+02-3.67E+02-1.11E+02-3.67E+0234自重J2-7.50E+02-7.50E+02-3.80E+02-9.57E+00-3.80E+0235自重I38-4.28E+004.28E+004.28E+00-4.28E+00-4.28E+0035自重J24-1.07E+021.07E+021.07E+02-1

15、.07E+02-1.07E+0236自重I39-8.16E+01-8.16E+01-8.16E+017.80E+007.80E+0036自重J26-1.69E+02-1.69E+02-1.69E+029.48E+019.48E+0137自重I40-8.16E+01-8.16E+01-8.16E+017.80E+007.80E+0037自重J34-1.69E+02-1.69E+02-1.69E+029.48E+019.48E+0138自重I414.28E+004.28E+004.28E+00-4.28E+00-4.28E+0038自重J361.07E+021.07E+021.07E+02-1.0

16、7E+02-1.07E+02单元荷载位置Cb(min/max) (kPa)Cb1(-y+z) (kPa)Cb2(+y+z) (kPa)Cb3(+y-z) (kPa)Cb4(-y-z) (kPa)1横梁反力I230.00E+000.00E+000.00E+000.00E+000.00E+001横梁反力J380.00E+000.00E+000.00E+000.00E+000.00E+002横梁反力I240.00E+000.00E+000.00E+000.00E+000.00E+002横梁反力J25-4.28E+004.28E+004.28E+00-4.28E+00-4.28E+003横梁反力I25

17、-7.20E+026.46E+026.46E+02-7.20E+02-7.20E+023横梁反力J39-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+024横梁反力I26-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+024横梁反力J27-8.16E+01-8.16E+01-8.16E+017.80E+007.80E+005横梁反力I27-1.69E+02-1.69E+02-1.69E+029.48E+019.48E+015横梁反力J28-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+026横

18、梁反力I28-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+026横梁反力J29-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+027横梁反力I29-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+027横梁反力J30-5.96E+02-5.96E+02-5.96E+025.22E+025.22E+028横梁反力I21-5.96E+02-5.96E+02-5.96E+025.22E+025.22E+028横梁反力J19-6.38E+02-6.38E+02-6.38E+025.64E+025.64

19、E+029横梁反力I19-5.87E+02-5.87E+02-1.68E+022.50E+02-1.68E+029横梁反力J17-9.18E+02-9.18E+02-2.67E+023.84E+02-2.67E+0210横梁反力I17-9.18E+02-9.18E+02-2.67E+023.84E+02-2.67E+0210横梁反力J15-8.17E+02-8.17E+02-2.80E+022.58E+02-2.80E+0211横梁反力I15-8.17E+02-8.17E+02-2.80E+022.58E+02-2.80E+0211横梁反力J13-7.16E+02-7.16E+02-2.92E

20、+021.32E+02-2.92E+0212横梁反力I13-7.16E+02-7.16E+02-2.92E+021.32E+02-2.92E+0212横梁反力J11-6.15E+02-6.15E+02-3.05E+025.77E+00-3.05E+0213横梁反力I11-6.15E+02-6.15E+02-3.05E+025.77E+00-3.05E+0213横梁反力J9-5.14E+02-5.14E+02-3.17E+02-1.20E+02-3.17E+0214横梁反力I9-5.14E+02-5.14E+02-3.17E+02-1.20E+02-3.17E+0214横梁反力J7-4.13E+

21、02-4.13E+02-3.30E+02-2.46E+02-3.30E+0215横梁反力I7-4.13E+02-4.13E+02-3.30E+02-2.46E+02-3.30E+0215横梁反力J5-3.72E+02-3.12E+02-3.42E+02-3.72E+02-3.42E+0216横梁反力I5-3.72E+02-3.12E+02-3.42E+02-3.72E+02-3.42E+0216横梁反力J3-4.98E+02-2.11E+02-3.55E+02-4.98E+02-3.55E+0217横梁反力I3-4.98E+02-2.11E+02-3.55E+02-4.98E+02-3.55E

22、+0217横梁反力J1-6.24E+02-1.11E+02-3.67E+02-6.24E+02-3.67E+0218横梁反力I37-6.24E+02-1.11E+02-3.67E+02-6.24E+02-3.67E+0218横梁反力J41-7.50E+02-9.57E+00-3.80E+02-7.50E+02-3.80E+0219横梁反力I360.00E+000.00E+000.00E+000.00E+000.00E+0019横梁反力J35-4.28E+004.28E+004.28E+00-4.28E+00-4.28E+0020横梁反力I35-7.20E+026.46E+026.46E+02-

23、7.20E+02-7.20E+0220横梁反力J40-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+02单元荷载位置Cb(min/max) (kPa)Cb1(-y+z) (kPa)Cb2(+y+z) (kPa)Cb3(+y-z) (kPa)Cb4(-y-z) (kPa)21横梁反力I34-1.69E+029.52E+019.52E+01-1.69E+02-1.69E+0221横梁反力J33-8.16E+01-8.16E+01-8.16E+017.80E+007.80E+0022横梁反力I33-1.69E+02-1.69E+02-1.69E+029.48E+01

24、9.48E+0122横梁反力J32-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+0223横梁反力I32-3.61E+02-3.61E+02-3.61E+022.87E+022.87E+0223横梁反力J31-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+0224横梁反力I31-5.03E+02-5.03E+02-5.03E+024.30E+024.30E+0224横梁反力J30-5.96E+02-5.96E+02-5.96E+025.22E+025.22E+0225横梁反力I22-5.96E+02-5.96E+02-5.96

25、E+025.22E+025.22E+0225横梁反力J20-6.38E+02-6.38E+02-6.38E+025.64E+025.64E+0226横梁反力I20-5.87E+022.50E+02-1.68E+02-5.87E+02-1.68E+0226横梁反力J18-9.18E+023.84E+02-2.67E+02-9.18E+02-2.67E+0227横梁反力I18-9.18E+023.84E+02-2.67E+02-9.18E+02-2.67E+0227横梁反力J16-8.17E+022.58E+02-2.80E+02-8.17E+02-2.80E+0228横梁反力I16-8.17E+

26、022.58E+02-2.80E+02-8.17E+02-2.80E+0228横梁反力J14-7.16E+021.32E+02-2.92E+02-7.16E+02-2.92E+0229横梁反力I14-7.16E+021.32E+02-2.92E+02-7.16E+02-2.92E+0229横梁反力J12-6.15E+025.77E+00-3.05E+02-6.15E+02-3.05E+0230横梁反力I12-6.15E+025.77E+00-3.05E+02-6.15E+02-3.05E+0230横梁反力J10-5.14E+02-1.20E+02-3.17E+02-5.14E+02-3.17E+0231横梁反力I10-5.14E+02-1.20E+02-3.17E+0