某木拱廊桥安全性鉴定和抗震评估

Safety Appraisal and Seismic Evaluation of a Timber-arched Corridor Bridge

摘要:

针对一座建于2015年的木拱结构仿古景观廊桥，通过现场勘查与有限元模拟相结合的方法，对其安全性和抗震性能进行系统评估。该廊桥采用传统工艺建造，主拱由“三节苗”和“五节苗”系统构成稳定结构，桥墩及桥台为钢筋混凝土与石构混合结构，上部为木构廊屋。重点分析了结构在对称与非对称荷载下的力学响应，该廊桥的结构体系安全性等级评定为A级，抗震性能满足相关规范要求。研究内容为类似木拱廊桥的维护与评估提供技术参考。

Abstract:

In response to a timber-arched structural antique landscape corridor bridge built in 2015, its safety and seismic performance are systematically evaluated through a combination of on-site investigation and finite element simulation. The bridge is constructed by traditional craftsmanship, its main arch is composed of a stable structure formed by the interweaving of "three-section-sapling" and "five-section-sapling" systems, its piers and abutments are a mixture of reinforced concrete and stone structures, and its superstructure is a timber-frame corridor house. The focus is on analyzing the mechanical response of the structure under symmetric and asymmetric loads. The results show that the structural system of the bridge is rated as Class A in terms of safety, and the seismic performance meets the requirements of the relevant codes, which also provides a technical reference for the maintenance and evaluation of similar timber-arched corridor bridges.