摘要
民用住宅中普遍使用燃气,使用不当会发生爆炸,进而可能引起结构构件破坏甚至整体倒塌,威胁人民生命财产安全。对于钢筋混凝土框架结构的住宅,框架柱作为结构中的关键承重构件,在燃气爆炸作用下会产生损伤,将影响整体结构的安全。为此,对燃气爆炸发生时钢筋混凝土柱进行损伤分析,根据承载力损伤准则评估框架柱的损伤程度,根据燃气爆炸作用下的材料应变率得到材料的动态本构关系,利用ABAQUS有限元软件建立模型,采用3种峰值的爆炸荷载进行动力分析,得到框架柱承载力的下降比例及损伤程度随爆炸荷载峰值的变化关系。
Gas is widely used in civil houses.When it is not used properly,there is a risk of explosion,which may cause damage to structural members or even overall collapse,and threaten the safety of people's lives and property.As the key load-bearing member of the frame structure,the damage of the column under the action of explosion will affect the safety of the overall structure.Therefore,when the gas explosion occurs,the damage of the reinforced concrete column is analyzed.And the damage degree of the column is evaluated according to the damage criterion of bearing capacity.According to the material strain rate under the action of gas explosion,the dynamic constitutive relationship of the material is obtained.The finite element model is established in the finite element software ABAQUS,and three peak explosion loads are applied for dynamic analysis.Then get the relationship between the decline proportion of the bearing capacity of the frame column and damage degree with the increase of the peak value of explosion load.
作者
张曙光
霍太虎
ZHANG Shu-guang(School of Civil Engineering,Changchun Institute of Technology,Changchun 130012,China)
出处
《长春工程学院学报（自然科学版）》
2022年第3期1-6,共6页
Journal of Changchun Institute of Technology：Natural Sciences Edition
关键词
燃气爆炸
动态本构关系
损伤程度
gas explosion
dynamic constitutive relation
damage degree
