基于结构承载能力的桥梁加固效果评价

Evaluation Method of Bridge Reinforcement Effect Based on Structure Carrying Capacity

在桥梁工程由大规模建设逐渐步入检测与养护阶段的大背景影响下,桥梁加固为适应多样化的性能需求影响,并不拘泥于有限的几种形式,有着广泛的发展前景。由于我国现行规范及标准主要针对加固的承载验算或施工质量控制层面,仅适用于加固方案的下限控制,缺乏方案之间的综合评定方法,用以对比各加固措施的效能。通过总结现有桥梁加固评价方法尚不完善之处,提出了安全程度及加固效率的综合评价方法,并依据该思路构架承载能力评价指标,结合规范标准及实施经验,给出了性能指标需要满足的极限状态强制性标准。最后,通过一座桥梁的加固实例展示了评价操作流程。

Under the condition of massive construction phase of bridge gradually converted to the detection and maintenance phases, in order to adapt to the diverse performance requirements, bridge reinforcement does not get bogged down on a limited number of forms, and it has a broad development prospects. Due to mainly aiming at the bearing checking calculation or the construction quality control, the current codes and standards of China apply only to the lower limit control of reinforcement scheme. The comprehensive assessment method was lacked between the schemes to contrast the efficiencies of different reinforcement measures. Based on summarizing the existing bridge reinforcement evaluation method still not perfected, this article proposes the comprehensive evaluation method of safety degree and reinforcement efficiency, and according to this method, the bearing capacity evaluation indexes are created. Combined with the standardand the practice experience, this article gives the limit mandatory standard that the performance indexes are required to satisfy. At last, the evaluation procedure is demonstrated by an example of bridge reinforcement.