价值工程
價值工程
개치공정
VALUE ENGINEERING
2014年
12期
114-115
,共2页
PC箱梁%水化热%温度场%裂缝控制%裂缝预测
PC箱樑%水化熱%溫度場%裂縫控製%裂縫預測
PC상량%수화열%온도장%렬봉공제%렬봉예측
PC Box-Girder%hydration heat%temperature field%crack control%fracture prediction
针对目前大跨度PC箱梁在施工过程中出现的水化热温度场导致出现裂缝现象，结合实际工程，综合考虑混凝土密度，比热容，热传导系数的温度时变效应，建立MIDAS/FEA水化热预测模型。对PC箱梁水化热温度场进行空间数值仿真，并与实测数据对比，预测施工水化热温度裂缝，提出温度裂缝控制方法。该成果对河北该地区大跨度箱梁桥施工具有一定的参考价值。
針對目前大跨度PC箱樑在施工過程中齣現的水化熱溫度場導緻齣現裂縫現象，結閤實際工程，綜閤攷慮混凝土密度，比熱容，熱傳導繫數的溫度時變效應，建立MIDAS/FEA水化熱預測模型。對PC箱樑水化熱溫度場進行空間數值倣真，併與實測數據對比，預測施工水化熱溫度裂縫，提齣溫度裂縫控製方法。該成果對河北該地區大跨度箱樑橋施工具有一定的參攷價值。
침대목전대과도PC상량재시공과정중출현적수화열온도장도치출현렬봉현상，결합실제공정，종합고필혼응토밀도，비열용，열전도계수적온도시변효응，건립MIDAS/FEA수화열예측모형。대PC상량수화열온도장진행공간수치방진，병여실측수거대비，예측시공수화열온도렬봉，제출온도렬봉공제방법。해성과대하북해지구대과도상량교시공구유일정적삼고개치。
In order to investigate the earlier temperature crack phenomenon of pier-on mass for concrete box girder during construction caused by hydration heat temperature,establishing the MIDAS/FEA model of the hydration heat. For PC box girder space hydration heat temperature field numerical simulation, and compared with the measured data,predict the construction hydration heat temperature crack, temperature crack control methods are put forward. The results of large span box girder bridge construction in the region have a certain reference value in Hebei province.
