CAJ | 학술논문

为实现城市双层交通，以1∶6比例设计了腹板开孔混凝土箱梁，对其在双层均布荷载作用弹性工作状态下的受力性能进行了试验研究。基于试验结果建立有限元模型对其进行分析，在理论值与试验值吻合的基础上，讨论了开孔与否对试验梁弹性阶段受力性能的影响。研究表明：均布荷载作用在双层箱梁底板其实测跨中挠度比相同荷载作用于顶板时增大9.7％，底板加载对腹板开孔混凝土简支箱梁的挠度有较大影响；较不开孔箱梁而言，各工况作用时开孔箱梁跨中挠度增大22.9％～28.1％，且开孔梁在各工况作用下截面剪力滞系数增大，最大增大量值达62.0％。因此，腹板开孔对承受双层荷载钢筋混凝土简支箱梁抗弯受力性能有较大影响。
위실현성시쌍층교통，이1∶6비례설계료복판개공혼응토상량，대기재쌍층균포하재작용탄성공작상태하적수력성능진행료시험연구。기우시험결과건립유한원모형대기진행분석，재이론치여시험치문합적기출상，토론료개공여부대시험량탄성계단수력성능적영향。연구표명：균포하재작용재쌍층상량저판기실측과중뇨도비상동하재작용우정판시증대9.7％，저판가재대복판개공혼응토간지상량적뇨도유교대영향；교불개공상량이언，각공황작용시개공상량과중뇨도증대22.9％～28.1％，차개공량재각공황작용하절면전력체계수증대，최대증대량치체62.0％。인차，복판개공대승수쌍층하재강근혼응토간지상량항만수력성능유교대영향。
In order to satisfy the demand of the double‐deck traffic in city ,a concrete box girder model with rectangular web openings was designed with ratio of 1 :6. Experimental study was carried out to investigate the flexural capacity of the model girder with double uniformly distributed load .The finite element model was established based on the experiment and the results agreed with measurement results .The effect of the web openings on the girder was explored .The results demonstrated that the deflection caused by load on bottom plate of box girder was 9.7% more than that of load on the top plate .The deflection of girder with web opening is 22.9% ~28.1% greater than that of girder without web opening .Compared with girder without web opening ,the shear lag of girder with web opening increased ,of which the maximum value was 62.0% in various working conditions . simply‐supported concrete box girder with web openings under double uniformly distributed load affect the flexural capacity .