现役提载预应力混凝土系杆拱桥承载能力的检测与评估

Detection and Evaluation of Bearing Capacity of Existing Tied Arch Bridge of Lift Loading Prestressed Concrete

为研究现役提载预应力混凝土系杆拱桥承载能力的检测与评估方法,以一座预应力混凝土系杆拱桥为工程背景,通过查阅工程资料、现场调查检测、荷载试验、承载能力检算评定的方法,评估了预应力混凝土系杆拱桥现有承载能力是否满足原设计标准和新荷载等级标准。研究结果表明:现役提载预应力混凝土系杆拱桥的承载能力是一项复杂且综合性的评估,某单一的检测手段无法对其作出科学客观的评价,应综合考虑其工程背景、区域规划、理论模型及实际工作状态,才能提供合理的评价与建议,在节约资源的情况下,保证桥梁的安全运营。

In order to study the detection and evaluation methods of the bearing capacity of existing tied-arch bridge of lift loading prestressed concrete,taking a tied-arch bridge of prestre ssed concrete as the engineering background,the bearing capacity of the bridge is comprehensively evaluated by consultingengineering data,field investigationand and inspection,and load test,which evaluated the bearing capacity of tied-arch bridge meets current standards of the original design or new load level.The research results show that the bearing capacity evaluation of existing tied-arch bridge of lift loading presstressed concrete is a complex and comprehensive evaluation,which cannot be evaluated scientifically and objectively only by a single detection method.Only by considering the engineering background,regional planning,theoretical model and actual working state,can the reasonable evaluation and suggestions be made,which in the case of saving resources,to ensure the safe operation of the bridge.