CAJ | 학술논문

选取拱肋截面为单圆管、哑铃形、桁式的钢管混凝土拱桥各一座,建立有限元模型,分析了钢管拱肋接缝错台时成桥状态下受力性能和截面承载力的影响.研究结果表明:接缝错台时拱肋轴力、竖向变形几乎没有影响,而对拱肋截面弯矩影响较小;错台幅值的增大,会造成钢管混凝土截面承载力逐渐降低,承载力的下降幅度与错台值、钢管面积的变化率基本呈线性相关的关系.在目前规范规定的错台限值情况下,截面弯矩最大变化率不超过1.2%;截面承载力下降幅度不超过4%;目前桥梁施工规范中对接缝错台的限定较为合理.
선취공륵절면위단원관、아령형、항식적강관혼응토공교각일좌,건립유한원모형,분석료강관공륵접봉착태시성교상태하수력성능화절면승재력적영향.연구결과표명:접봉착태시공륵축력、수향변형궤호몰유영향,이대공륵절면만구영향교소;착태폭치적증대,회조성강관혼응토절면승재력축점강저,승재력적하강폭도여착태치、강관면적적변화솔기본정선성상관적관계.재목전규범규정적착태한치정황하,절면만구최대변화솔불초과1.2%;절면승재력하강폭도불초과4%;목전교량시공규범중대접봉착태적한정교위합리.
Three types of CFST arch bridge with rib cross-sections of single tube.dumbbell and truss were selected to build FEM models.The effect of arch rib joint deviation on mechanical behavior and section carrying capacity under condition of completion were analysed.The research result shows that(1)the joint deviation has little influence on axial force and vertical deformation,and has less influence on section moment of arch rib;(2)section carrying capacity of CFST will reduce with increment of joint deviation;(3)There are linear dependence relation of carrying capacity reduction with change rates of joint deviation and steel tube area.Considering the limit of joint deviation stipulated in the current bridge construction specification,the maximal change rate of section moment and reduce rate of carrying capacity ale no more than 1.2% and 4% respectively.The limit of joint deviation in the current bridge construction specification is rational.