摘要
以模糊随机变量为基本变量,定义了模糊随机功能函数,以挠度为指标建立了既有桥梁加固前后正常使用极限状态下模糊随机极限状态方程.利用等效关系将模糊随机变量当量随机化,给出了挠度抗力的取值范围,讨论了挠度抗力在加固前后对可靠度指标的影响.结果表明模糊计算模式较定量计算模式可靠度指标更为保守,加固后桥梁更加安全;挠度抗力和荷载作用下竖向挠度对可靠度指标的影响互相关联;桥梁加固后,粘贴钢板加固方式对提高梁体抗变形能力优于粘贴碳纤维板法.
Based on the fuzzy random variable, the fuzzy random function function is defined, and the fuzzy random limit state equation is established for the limit state of the bridge before and after reinforcement. By using the equivalent relation, the random variables of the fuzzy random variables are equivalent, the range of the deflection resistance is given. The results show that the fuzzy model is the quantitative calculation model of reliability index is more conservative, more strengthened bridge safety; influence on the reliability index of resistance and load deflection under the action of vertical deflection of interconnected; bridge reinforcement, reinforcement of bonding steel plate to improve the beam deformation resistance is better than carbon fiber plate method.
作者
黄海新
李德龙
HUANG Haixin;LI Delong(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)
出处
《河北工业大学学报》
CAS
2018年第4期75-82,共8页
Journal of Hebei University of Technology
基金
国家重点研发计划(2017YFE0103000)
河北省科技计划项目(15215431)
旧桥检测与加固技术交通行业重点实验室(北京)开放课题
关键词
模糊随机变量
挠度
正常使用极限状态
可靠度指标
抗变形能力
fuzzy random variable
deflection
serviceability limit state
reliability index
deformation resistance
