合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2014年
11期
1341-1345
,共5页
桥梁工程%连续刚构桥%失效树%失效模式%相关性%可靠指标
橋樑工程%連續剛構橋%失效樹%失效模式%相關性%可靠指標
교량공정%련속강구교%실효수%실효모식%상관성%가고지표
bridge project%continuous rigid frame bridge%failure tree%failure mode%correlation%relia-bility index
文章讨论了针对连续刚构桥破坏机理和失效准则,采用失效树的方法进行桥梁体系可靠性分析;运用全局临界强度分枝‐约界准则识别结构体系主要失效模式,以JC法计算各主要失效模式的可靠指标,结合失效模式的相关性,提出了连续刚构桥体系可靠指标计算流程。以某连续刚构桥为例,分析了不同构件的失效类型及失效顺序,绘制了相应失效树图形,计算了连续刚构桥主要失效模式的可靠指标、失效概率及桥梁结构体系可靠性。研究结果表明各失效模式间的相关性非常高,主梁比桥墩更易失效,给出的连续刚构桥体系可靠指标计算流程可以全面反映连续刚构桥体系失效问题。
文章討論瞭針對連續剛構橋破壞機理和失效準則,採用失效樹的方法進行橋樑體繫可靠性分析;運用全跼臨界彊度分枝‐約界準則識彆結構體繫主要失效模式,以JC法計算各主要失效模式的可靠指標,結閤失效模式的相關性,提齣瞭連續剛構橋體繫可靠指標計算流程。以某連續剛構橋為例,分析瞭不同構件的失效類型及失效順序,繪製瞭相應失效樹圖形,計算瞭連續剛構橋主要失效模式的可靠指標、失效概率及橋樑結構體繫可靠性。研究結果錶明各失效模式間的相關性非常高,主樑比橋墩更易失效,給齣的連續剛構橋體繫可靠指標計算流程可以全麵反映連續剛構橋體繫失效問題。
문장토론료침대련속강구교파배궤리화실효준칙,채용실효수적방법진행교량체계가고성분석;운용전국림계강도분지‐약계준칙식별결구체계주요실효모식,이JC법계산각주요실효모식적가고지표,결합실효모식적상관성,제출료련속강구교체계가고지표계산류정。이모련속강구교위례,분석료불동구건적실효류형급실효순서,회제료상응실효수도형,계산료련속강구교주요실효모식적가고지표、실효개솔급교량결구체계가고성。연구결과표명각실효모식간적상관성비상고,주량비교돈경역실효,급출적련속강구교체계가고지표계산류정가이전면반영련속강구교체계실효문제。
T he continuous rigid frame bridge failure mechanism and failure criterion are studied ,and the bridge system reliability analysis is conducted by using the method of failure tree .The major fail‐ure modes of the structural system are identified by the global threshold intensity branch‐and‐bound standard ,and the reliability index of each major failure mode is calculated by using JC method .Based on the correlation of failure modes , the reliability index calculation procedure of continuous rigid frame bridge system is put forward .Finally ,taking a continuous rigid frame bridge as an example , the different types of component failure and failure sequence are analyzed ,the corresponding failure tree graph is draw n ,and the reliability index ,failure probability of the major failure modes and bridge structure system reliability are calculated .The results show a very high correlation between the vari‐ous failure modes ,the main beams are more likely to fail than piers ,and the reliability index calcula‐tion procedure of continuous rigid frame bridge system proposed in this paper can comprehensively re‐flect continuous reflect frame bridge system failures .