摘要
采用断裂力学方法,通过比较不同的宏观断裂力学模型,得出适合混凝土有限元分析的模型——裂纹带模型。基于该模型,编制有限元结构分析程序——桥梁结构承载力分析系统,计算试验梁的极限承载力,并将计算结果与试验数据相比较,验证本程序计算结果基本准确可靠,同时,与采用现行公路桥涵设计规范计算的该试验梁承载力相比较,证明现行公路桥涵设计规范在计算桥梁结构承载力时,安全储备较高。
The paper compared different macrographs fracture mechanics models by fracture mechanics,and got the finite-element analysis model,which was crack band model.Based on crack band model,the finite-element structure analysis program of ＂Bridge Bearing Capacity Analysis System＂ was programmed.Then it calculated the ultimate bearing capacity of a test beam by this program and compared the calculated numeric value with the laboratory numeric value to prove the accuracy of program.Meanwhile,it compared the result with the numeric value which was calculated according to the current bridge and culvert design criterion.It was proved that the latter was of higher safety stock.
出处
《交通标准化》
2011年第14期103-106,共4页
Communications Standardization
关键词
桥梁结构
极限承载力
断裂力学
有限元结构分析程序
bridge structure
ultimate bearing capacity
fracture mechanics
finite-element structure analysis program
