钢筋混凝土结构抗连续倒塌研究进展  

Research progress on progressive collapse resistance of reinforced concrete structures

作　　者：何羽 钱凯 于晓辉 HE Yu;QIAN Kai;YU Xiaohui(Guangxi Key Laboratory of Green Building Materials and Construction Industrialization,Guilin University of Technology,Guilin,Guangxi 541004)

机构地区：[1]桂林理工大学广西绿色建材与建筑工业化重点实验室,广西桂林541004

出　　处：《河北工业大学学报》2025年第1期16-31,63,共17页Journal of Hebei University of Technology

基　　金：广西杰出青年科学基金资助项目(2021GXNSFFA196001);国家自然科学基金资助项目(U22A20244,52478503);桂林理工大学科研启动基金资助项目(GUTQDJJ 2024054)。

摘　　要：建筑结构在极端荷载作用下极易发生连续倒塌,对人们的生命和财产安全造成了巨大的威胁。作为近年来土木工程领域研究的热点问题,结构连续倒塌相关研究难度较大,面临着几何材料影响因素多、极端荷载不确定性大、结构力学行为随机性显著等难题。本文通过系统的文献调研,针对建筑结构中量大面广的混凝土结构,从基本定义、试验研究、数值模拟、理论研究、加固策略等方面对近年来建筑结构连续倒塌领域相关研究进展进行了系统梳理,并对已有研究存在的不足进行了分析讨论。结果表明:1)在试验方面,已有研究多针对单一极端荷载下框架结构抗倒塌力学机制,而对框剪结构和砌体结构的相关研究明显偏少仍需投入更多关注;2)在数值模拟方面,现有连续倒塌模拟主要基于有限元、离散元和应用单元法等,尚不能准确考虑钢筋锈蚀、断裂、界面滑移等行为影响;3)已有抗力理论模型计算过程过于烦琐,且尚未有效考虑结构尺寸效应,对于真实负载三维带楼板结构的计算准确性略显不足。现有研究对复杂荷载工况及不同类型结构考虑欠缺,建议进一步探究爆炸荷载、火灾、冲击等多灾害耦合作用下结构连续倒塌行为,研究高效低成本的抗倒塌组合加固策略。此外,在复杂结构连续倒塌试验加载平台、高效数值模拟方法、结构韧性安全评估模型等方面仍需开展深入研究。Building structures are prone to progressive collapse under extreme loads,posing a huge threat to the safety of human life and property.As a research hotspot in the field of civil engineering in recent years,studies on progressive collapse of buildings still have huge challenges,including numerous geometric and material influencing factors,multiple uncertainties in extreme loads,and significant randomness in structural mechanical behavior.This paper systematically reviews the recent research progress in the field of progressive collapse of widely used reinforced concrete(RC)structures through comprehensive literature analysis.It covers key aspects such as basic definitions,experimental studies,numerical simulations,theoretical researches,and strengthening strategies,while also analyzing and discussing the shortcomings of existing studies.The results indicate the following three aspects:1)Existing experimental studies mainly focus on frame structures under single extreme load.The progressive collapse tests on shear wall structures and masonry structures need to be investigated deeply.2)Numerical simulations are mainly based on finite element,discrete element,and applied element methods,which cannot accurately consider the effects of steel corrosion,rebar fracture,and interface slip accurately.3)The existing resistance theoretical models are overly complex during calculation processes,which cannot effectively account for structural size effects.Additionally,the accuracy in calculating three-dimensional structures with slabs under realistic loads is insufficient.There is still lacking sufficient consideration for complex load conditions and different types of structures.It is recommended to further explore the progressive collapse behavior of structures under multi-hazard coupling effects,such as explosions,fires,and impacts.It is essential to develop efficient and cost-effective combined strengthening strategies to resist collapse.Furthermore,future research is needed in areas such as experimental loading for progr

关 键 词：连续倒塌 试验研究 抗力机制 数值模拟 文献综述 

分 类 号：TU375[建筑科学—结构工程]