CAJ | 학술논문

结合南宁至广州铁路桂平郁江钢桁斜拉桥工程实例，对其正交异性整体桥面系的力学行为进行分析，得出此类结构的一些规律和结论，可供类似工程借鉴和参考。通过建立该桥整体空间有限元模型，分别采用空间板壳单元，模拟正交异性整体桥面系各构件、受拉空间杆单元模拟斜拉索、空间梁单元模拟桥梁其他构件，用空间有限元方法进行桥面结构的力学行为分析。结果表明：正交异性桥面结构整体性能好，各组成部分受力规律性较强；钢桁梁节间范围内布设多道次横梁并采用小刚度纵梁的结构体系可以有效减弱桥面结构参与主桁的共同作用，使得桥面结构应力水平不高、受力均匀，符合结构受力合理的特点；混凝土道砟槽板拉应力水平较高，应采用高配筋进行控制。
결합남저지엄주철로계평욱강강항사랍교공정실례，대기정교이성정체교면계적역학행위진행분석，득출차류결구적일사규률화결론，가공유사공정차감화삼고。통과건립해교정체공간유한원모형，분별채용공간판각단원，모의정교이성정체교면계각구건、수랍공간간단원모의사랍색、공간량단원모의교량기타구건，용공간유한원방법진행교면결구적역학행위분석。결과표명：정교이성교면결구정체성능호，각조성부분수력규률성교강；강항량절간범위내포설다도차횡량병채용소강도종량적결구체계가이유효감약교면결구삼여주항적공동작용，사득교면결구응력수평불고、수력균균，부합결구수력합리적특점；혼응토도사조판랍응력수평교고，응채용고배근진행공제。
The main bridge of the Guiping Yu River Bridge is a steel truss girder cable-stayed bridge with integral ortho-tropic deck system. In this paper, the mechanical behaviors of the deck system have been analyzed by using the finite element method. The deck systems are simulated by spatial plate element and shell element. The cables are stimulated by spatial tensile truss element. Other girder members are stimulated by beam element. The results show that the whole performances of the orthotropic deck system are good;the regularity of each component’s force is clear;the deck struc-ture of using multiple transverse beams and small longitudinal beams within each internode can effectively weaken the in-teraction of deck structure and truss girders to makes the stress of bridge deck structure not high and well-distributed, and high reinforcement ratio for concrete ballast plate should be adopted to control its higher tensile stress.