西南交通大学学报
西南交通大學學報
서남교통대학학보
JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY
2009年
6期
812-816
,共5页
组合梁%斜拉桥%相对滑移%剪力滞%极限承载力%Abaqus软件
組閤樑%斜拉橋%相對滑移%剪力滯%極限承載力%Abaqus軟件
조합량%사랍교%상대활이%전력체%겁한승재력%Abaqus연건
composite beam%cable-stayed bridge%relative slip%shear lag%ultimate load-beating capacity%Abaqus software
为探讨斜拉索断裂、组合梁界面相对滑移和桥面板剪力滞效应对结构极限承载力的影响,以在建的重庆江津观音岩组合梁斜拉桥为工程背景,考虑结构的几何非线性、材料非线性、体系转换、位移和应力的累积效应,按第二类稳定理论对桥梁全过程极限承载力进行了研究.结果表明,考虑斜拉索断裂、组合梁界面相对滑移和桥面板剪力滞效应的影响后,结构承载力安全系数最大变化分别达23.0%,19.0%和42.4%;斜拉索断裂对极限承载力的影响是一个先增大再逐渐减小的过程,而界面滑移和桥面板剪力滞效应对结构极限承载力的影响主要表现在短悬臂阶段.
為探討斜拉索斷裂、組閤樑界麵相對滑移和橋麵闆剪力滯效應對結構極限承載力的影響,以在建的重慶江津觀音巖組閤樑斜拉橋為工程揹景,攷慮結構的幾何非線性、材料非線性、體繫轉換、位移和應力的纍積效應,按第二類穩定理論對橋樑全過程極限承載力進行瞭研究.結果錶明,攷慮斜拉索斷裂、組閤樑界麵相對滑移和橋麵闆剪力滯效應的影響後,結構承載力安全繫數最大變化分彆達23.0%,19.0%和42.4%;斜拉索斷裂對極限承載力的影響是一箇先增大再逐漸減小的過程,而界麵滑移和橋麵闆剪力滯效應對結構極限承載力的影響主要錶現在短懸臂階段.
위탐토사랍색단렬、조합량계면상대활이화교면판전력체효응대결구겁한승재력적영향,이재건적중경강진관음암조합량사랍교위공정배경,고필결구적궤하비선성、재료비선성、체계전환、위이화응력적루적효응,안제이류은정이론대교량전과정겁한승재력진행료연구.결과표명,고필사랍색단렬、조합량계면상대활이화교면판전력체효응적영향후,결구승재력안전계수최대변화분별체23.0%,19.0%화42.4%;사랍색단렬대겁한승재력적영향시일개선증대재축점감소적과정,이계면활이화교면판전력체효응대결구겁한승재력적영향주요표현재단현비계단.
In order to deeply research the effects of stay cable breaking, relative interface slip of composite girder and deck shear-lag effect on structural ultimate load-bearing capacity, Guanyinyan composite girder cable-stayed bridge in Jiangjin in Chongqing, as the engineering background, was investigated by considering geometrical nonlinearity, material nonlinearity, system transition and cumulative effect of displacements and stresses and adopting the theory of second kind static stability.The research results show that stay cable breaking, relative interface slip of composite girder and deck shear-lag effect have great influences on safety factor for the ultimate bearing-capacity of a long-span composite girder cable-stayed bridge, and the maximum variation of the safety factor resulted from them are respectively 23.0%, 19.0% and 42.4%. The effect of stay cable breaking on the ultimate loadbearing capacity increases firstly and then decreases gradually, while the influences of the relative interface slip and the deck shear-lag effect behave mainly at the stage of short cantilever.