地震灾害和意外事件下建筑结构抗倒塌研究:进展和展望

RESEARCH ON THE COLLAPSE PREVENTION OF BUILDINGS UNDER EARTHQUAKE DISASTERS AND ACCIDENTAL EVENTS: PROGRESS AND PROSPECT

  • 摘要: 建筑是城市安全的主要承灾体和城市功能的承载体,随着经济的发展,需要建设大量的公共、商业等建筑以满足各类社会生产、生活需求。地震灾害和意外事件都可能导致建筑结构倒塌,造成人民生命财产损失和恶劣的社会影响。近年来,各类倒塌事件不断,暴露出现有建筑抗倒塌能力仍然存在众多隐患。因此越来越多的专家学者开始关注建筑结构的抗倒塌问题,通过理论、试验与数值模拟等,在建筑结构抗倒塌研究领域取得了显著进展。首先回顾了汶川地震对中国结构抗地震倒塌研究和抗震设计规范的影响与挑战,梳理了结构抗倒塌设计的发展历程,讨论了近期国内外建筑倒塌事件和极罕遇地震对既有方法和理论的冲击和启示。基于文献调研分析了目前抗倒塌领域的发展和存在的关键科学问题,从建筑倒塌计算模型、设计理论、抗倒塌性能要求/可接受水准、不同类型建筑抗倒塌研究和设计规范与标准等方面探讨目前结构抗倒塌研究现状,总结归纳了建筑结构抗倒塌研究和工程实践在新结构抗倒塌设计理论发展、计算模型创新、复杂荷载作用下的倒塌模型研发及抗倒塌设计规范与标准完善等方面的未来发展方向。

     

    Abstract: Buildings serve as the principal component of urban safety and the carrier of urban functions. With the development of economy, various kinds of buildings (e.g., public, commercial, etc.) have been built to satisfy the demands of social production, of human living, and so forth. The collapse of buildings initiated by earthquake disasters and accidental events will result in severe casualties, economic loss, and adverse social repercussions. In recent years, various collapse incidents have continued to occur, revealing numerous hidden dangers in the collapse resistance of existing buildings. Hence, more and more scholars start to pay attention to the collapse of building structures. Via theory, experiment, and numerical simulation, significant progress has been achieved in the area of collapse resistance of building structures. The impact and challenges of the Wenchuan earthquake on the research on structural resistance against earthquake-induced collapse and seismic design codes are first reviewed. The development of structural anti-collapse design is teased out, and the inspiration and impact of recent collapse events and extreme earthquakes on existing design methods and theory are discussed. A literature review is thusly conducted to discuss the development and key scientific issues in the field of anti-collapse research. Current status of structural anti-collapse research is summarized from the following aspects, including building collapse computation models, design theory, anti-collapse performance requirements/acceptance levels, collapse research on different types of buildings, and building codes for anti-collapse design. Summarized are future directions for the development of anti-collapse research and engineering practices, including the evolution of anti-collapse design theory for new structures, the innovation in computational models, the development of collapse models under complex loads, and the refinement of standards and specifications.

     

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