城市土木工程基础设施韧性提升理论与方法

保证城市土木工程基础设施的功能是建设韧性城市的关键。以“灾害/环境作用-结构响应-灾变控制-韧性提升”为主线，从材料、结构、系统等不同尺度，对相关研究成果进行回顾与分析。结果表明：对单一灾害或单一环境作用机制、单一环境作用下结构材料性能退化机理及其恢复方法、单一灾害作用下单体结构的灾变响应与控制等方面有了清晰的认识和技术应对措施。但是，多重灾害和复杂环境作用下城市土木工程基础设施的灾变机理更加复杂、韧性提升难度更大。未来需进一步深入研究多重灾害触发及复杂环境作用机制、复杂环境作用下结构材料性能退化机理及其恢复方法、多灾害与复杂环境作用下单体结构灾变机理与控制方法以及城市土木工程基础设施系统的灾变机理与韧性提升方法。

THEORY AND METHOD OF RESILIENCE ENHANCEMENT OF URBAN CIVIL ENGINEERING INFRASTRUCTURES

It is the foundation to ensure functions of civil engineering infrastructures for building resilient cities. This paper critically reviewed and analyzed the state-of-the-art on 'hazard/environmental action-structural response-hazard control-resilience enhancement' for materials, structures, and systems of civil engineering infrastructures. It was found that mechanisms of a single hazard or a single environmental action, degradation mechanisms and recovery methods of structural materials under a single environmental action, and hazard response analysis and control of a single structure under a single hazard action have been clearly understood. However, failure mechanisms of civil engineering infrastructures under multiple hazards and complex environmental actions are more complicated, and it is more difficult to enhance resilience of urban civil engineering infrastructures considering multiple hazards and complex environmental actions. It is suggested to further identify trigger mechanisms of multiple hazards and action mechanisms of complex environmental conditions, degradation mechanisms and repair methods of structural materials under complex environmental actions, failure mechanisms and control/resilience enhancement methods for a single structure and civil engineering infrastructural systems under multiple hazards and complex environmental actions.