基于静载试验的混凝土梁桥受力行为预测  

Forecast of Mechanical Behavior of Concrete Bridges Based on Static Load Test

作　　者：陈康生 林晶[2] 

机构地区：[1]江西国际经济技术合作公司,江西南昌330046 [2]同济大学桥梁工程系,上海200092

出　　处：《城市道桥与防洪》2013年第5期97-99,105,共4页Urban Roads Bridges & Flood Control

摘　　要：该文介绍了利用基于静载试验的回归方法对混凝土多梁式梁桥正常使用阶段的受力行为预测进行了研究。采用单级加载的方法,以加载车在桥面事先确定的几个位置上停留,并测量相应的各主梁跨中的挠度。依据实测值,根据相关数理统计理论,建立主梁的荷载-挠度方程,对主梁在预期较高荷载标准的车辆或重车作用下的最大跨中挠度进行预测。通过将预测数据与实桥试验数据对比可知:该方法能对混凝土多梁式梁桥正常使用阶段的受力行为进行有效预测,易于实际工程的应用。The article introduces the use of the regression method based on the static load test to forecast the mechanical behavior of concrete multi-beam bridge in the normal service period.By using the single-step loading method,the loading vehicles are parked at several determined positions of bridge deck in advance so as to measure relative deflections in various main beam spans.Based on the measured values and the related statistics theory,the load – deflection equation of the main beam is set up to forecast the deflection in the longest span of the main beam under the expected higher load standard of vehicle or heavy load.According to the comparison of the forecast data and the measured data of bridge,the result shows that this method can be used to effectively forecast the mechanical behavior of concrete multi-beam bridge in the normal service period,and it is easy to use in the practical projects.

关 键 词：桥梁工程 荷载试验 回归方法 正常使用阶段 

分 类 号：U446[建筑科学—桥梁与隧道工程]