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木结构存在着耐火性和稳定性差等结构安全问题,同时对于木结构的抗连续倒塌问题也应在设计中进行考虑。结合已有的成果,对木结构连续倒塌的案例、当前所用的理论、试验、数值模拟及设计方法作出总结评述。通过对几个具有代表性案例的分析,总结了其倒塌的原因和经验教训;从理论方面讨论了木结构自身冗余、鲁棒性、木材延性与抗连续倒塌的关系;从试验研究上,介绍国外的木结构抗连续倒塌试验结果;从设计标准数值模拟方面,从木结构的有限元模拟和离散元模拟两方面展开讨论;从设计方法方面,结合标准从目前4种设计方法进行论述。最后对木结构连续倒塌的发展趋势进行了展望。
The wood structure has the problems of structural safety such as poor fire resistance and stability. At the same time, the problem of continuous collapse of the wood structure should also be considered in the design. Combined with the existing achievements, the paper summarizes the cases of continuous collapse of timber structures, the theories, experiments, numerical simulations and design methods used at present. Through the analysis of several representative cases, the causes and experiences of the collapsing were summarized. The relationship between the wood structure itself redundancy and robustness, wood ductility and anti-collapse was discussed in theory. From the experimental research, The results of anti-collapse test of wood structure in foreign countries are introduced. From the aspects of design numerical simulation, the paper discusses the two aspects of finite element simulation and discrete element simulation of wood structure. From the aspects of design method and the standard, it discusses the four kinds of design methods. Finally, the development trend of continuous collapse of timber structure is prospected.