摘要
针对既有建筑结构在长期服役过程中会因疲劳、锈蚀、材料老化等因素导致性能逐渐退化,给结构安全性和耐久性带来隐患这一问题,构建了考虑疲劳累积损伤、钢筋锈蚀及材料老化的建筑结构性能退化数学模型,在此基础上提出了面向寿命周期的加固策略优化方法。通过对某综合办公楼结构进行案例分析,对比不同加固时机和方案的效果与成本,验证了将结构性能退化模型直接应用于加固策略优化的可行性和优势。结果表明:基于退化模型的加固优化能显著提高加固方案的针对性和有效性,在确保结构全寿命周期安全可靠的同时,兼顾经济性,为既有建筑结构的耐久安全管理提供了新的思路和参考。
Existing building structures will gradually deteriorate in long-term service due to fatigue,corrosion,material aging and other factors,which brings potential danger to structural safety and durability.In order to address this problem,this paper constructs a mathematical model of structural degradation considering fatigue cumulative damage,corrosion of reinforcement and material aging,and on this basis proposes a life-cycle oriented optimization method of reinforcement strategy.The feasibility and advantages of applying the structural performance degradation model directly to the optimization of reinforcement strategy are verified through a case study of a comprehensive office building structure,comparing the effects and costs of different reinforcement timing and schemes.The results show that the optimization of reinforcement based on the degradation model can significantly improve the relevance and effectiveness of the reinforcement scheme,ensure the safety and reliability of the structure in the whole life cycle while taking into account the economy,and provide new ideas and references for the durable safety management of existing building structures.
作者
罗杰鸣
Luo Jieming(Guangdong Fang’an Safety Inspection and Appraisal Co.,Guangzhou Guangdong 510600,China)
出处
《山西建筑》
2025年第21期67-72,共6页
Shanxi Architecture
关键词
既有建筑
结构性能退化
疲劳
锈蚀
加固策略优化
existing buildings
structural performance degradation
fatigue
corrosion
optimization of reinforcement strategies
