北京地区钢筋混凝土简支梁桥结构综合评估系统

Evaluation system for existing simply supported beam type reinforced concrete bridge structures in Beijing

钢筋混凝土桥的老化问题非常普遍。北京地区已有许多钢筋混凝土桥被列入危桥 ,亟待评估和处理。在对 30座钢筋混凝土简支梁桥进行现场调查、测试 ,和对 3根已拆桥面梁进行静力加载试验的基础上 ,建立了在用钢筋混凝土简支梁桥结构耐久性、安全性和适用性的多层次评估模型和评定方法 ,并完成了相应的的计算机评估系统。对 17座在用桥梁进行了评估 ,评估结果与实际损伤情况相符。该系统可为钢筋混凝土简支梁桥的养护维修决策 。

Numerous reinforced concrete (RC) structures in Beijing are aging, especially bridges. These structures need to be evaluated and upgraded if necessary. Data from 30 RC bridges and static laboratory tests of 3 RC bridge beams which have been in service for 35 years was used to develop a multi-level model and evaluation method to evaluate the structural deterioration, safety, and durability of simply supported beam bridge structures. A computer system was used to evaluate the status of 17 existing bridges. The results show that the method is reasonable. The system provides a scientific basis for the maintenance, repair and strengthening of RC bridges.