摘要
钢筋混凝土框架结构在工业及民用建筑物中占有较大比例。结构在长期环境和荷载的作用下,会出现不同程度的损伤,使结构的性能下降,使得结构的耐久性和安全性受到影响。引入锈蚀钢筋的材料本构,对某复杂钢筋混凝土框架结构进行竖向承载力可靠度分析。根据稳定性分析和抗倒塌分析确定该结构的危险位置为底层框架柱,从而确定结构的状态方程,利用基于Kriging近似模型,对结构可靠度进行分析,随着钢筋锈蚀程度的加深,结构的失效概率增加。选取30条随机地震波,对该钢筋混凝土框架结构进行地震作用下的性能进行分析,该结构在地震作用下均处于基本完好到中度损伤之间,未到达倒塌的程度。随着钢筋锈蚀程度的加深,结果分布向中度损伤趋近。
There is large amount of reinforced concrete frame structures in industrial and civil buildings. Under the action of long-term environment and load, the structure will be damaged to different degrees, which will affect the performance of the structure and the durability of the structure. In this paper, the material constitutive of corroded steel bars is introduced, and the reliability of vertical bearing capacity of a complex reinforced concrete frame structure is analyzed.According to the stability and anti-collapse analysis, the dangerous position of the structure is determined, which shows that the bottom frame column is the most influential part in this structure, so as to determine the state equation of the structure. Then, the Kriging meta model is involved to analyze the structural reliability. The failure probability of the structure increases with the deepening of steel corrosion. 30 random seismic waves were selected to analyze the performance of the reinforced concrete frame structure under the action of earthquake. The structure was in basically intact to moderate damage under the action of earthquakes, and did not reach the level of collapse. With the deepening of steel corrosion, the result distribution tends forward to moderate damage.
作者
谈凤婕
崔家春
TAN Fengjie;CUI Jiachun(East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200041,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期361-368,共8页
Building Structure
基金
上海市浦江人才计划资助(20PJ1416500)
