大跨度预应混凝土箱梁桥的挠度监测与预测

结合某长江特大桥挠度监测实例，详细地介绍了大跨度预应力混凝土箱梁桥挠度变形监测的方法、测点布置、观测精度和数据的处理。针对桥梁挠度变形影响因素，利用实测资料，借助“桥梁博士”软件从桥梁结构的角度预测了该桥在不同时期的挠度变形值，并分析了挠度变形状况、变形规律及变形趋势，得出了有益的结论，为桥梁管理部门进行后期的维护提供了决策依据。

Deflection monitoring and forecasting of long span pre-stressed concrete continuous box beams

Based on the deflection monitoring project in Yangtze River bridge, this paper describes the method of deflection deformation monitoring, the arrangement of measuring points, the monitoring accuracy, and the data processing for long span pre-stressed concrete continuous box beams. The authors of this paper use the ＂Dr. bridge＂ software and the measured data to forecast the deformation value of a bridge deflection at different time from the perspective of bridge structure, and to analyze the state, law and trend of that. Some useful conclusions have been reached, which can provide a decision making basis for bridge management and maintenance.