CAJ | 학술논문

为了确定正交异性钢桥面铺装受力状态并为设计提供参考,运用子模型有限元法分析了桥梁整体变形及局部轮载作用下铺装内部受力状态及应变分布特点.为优化设计铺装层结构,分析了铺装层模量对其应变状态影响.分析结果表明:大跨径钢桥整桥变形对铺装层受力状态影响很小,铜桥面铺装设计的控制受力因素是轮载局部作用下铺装层的横向应变,铺装层模量对铺装层的受力状态有显著影响,通过提高铺装层刚度过渡层的结构优化设计措施可以显著改善铺装层的受力状态,降低铺装层的应变水平.分别对环氧沥青混凝土、SBS改性沥青SMA和Rosphalt改性沥青混凝土的模量及疲劳性能进行了试验评价,可以为桥面铺装结构组合设计提供参考数据.
위료학정정교이성강교면포장수력상태병위설계제공삼고,운용자모형유한원법분석료교량정체변형급국부륜재작용하포장내부수력상태급응변분포특점.위우화설계포장층결구,분석료포장층모량대기응변상태영향.분석결과표명:대과경강교정교변형대포장층수력상태영향흔소,동교면포장설계적공제수력인소시륜재국부작용하포장층적횡향응변,포장층모량대포장층적수력상태유현저영향,통과제고포장층강도과도층적결구우화설계조시가이현저개선포장층적수력상태,강저포장층적응변수평.분별대배양력청혼응토、SBS개성력청SMA화Rosphalt개성력청혼응토적모량급피로성능진행료시험평개,가이위교면포장결구조합설계제공삼고수거.
To analyze the stress state of steel orthotropic deck pavement and provide reference for the design of the overlay, the inner stress state and strain distribution of surfacing under the load of the deformation of the whole bridge structure and tyre load are analyzed by the finite element method of submodeling. Influence of surfacing modulus on the strain state of the overlay is analyzed for the purpose of the optimal design of the overlay structure. Analysis results show that the deformation of the whole bridge structure has no evident influence on the stress state of the overlay. The key factor of the overlay design is the transverse tensile strain in the overlay above the upper edge of web plate of rib. The stress state of the overlay is influenced evidently by the modulus of rigidity transform overlay. And the stress state of the overlay can be optimized and lowered by increasing the modulus and thickness of rigidity transform overlay. The fatigue test has been done to evaluate the fatigue performance and modulus of different deck pavement materials such as epoxy asphalt, SBS modified asphalt, rosphalt asphalt which can provide reference for deck pavement structure design.