STC钢桥面铺装新体系的力学计算与实桥试验对比分析

发布时间：2018-04-24 22:03

本文选题：桥梁工程 + 桥面铺装　；参考：《中国公路学报》2014年03期

【摘要】：为解决当前钢桥面铺装层易破损及桥面钢结构疲劳开裂两大病害难题,提出了超高韧性混凝土(Super Toughness Concrete,STC)钢桥面铺装新体系,并首次应用于广东马房大桥上;采用有限元计算结果与第三方实桥检测数据相对比的方法分析了新体系的铺装效果。研究结果表明:钢-STC组合桥面结构大幅提升了桥面的刚度,新铺装体系正交异性桥面板各控制点的应变及竖向位移峰值降幅达46.82%~90.89%,改善效果远超过原有的沥青铺装;STC材料抗拉强度完全能满足最大拉应力7.97MPa的受力要求;基于薄层STC的钢桥铺装新体系可以有效降低钢桥面结构的应力及变形,改善铺装层的受力状况,从而消除钢桥面疲劳开裂及铺装层开裂、车辙等风险。
[Abstract]:In order to solve the problems of easy damage of steel deck pavement and fatigue cracking of steel deck structure, a new steel deck surfacing system of super ductile concrete (Super Toughness Concrete) is put forward, which is applied to Mafang Bridge in Guangdong for the first time. The pavement effect of the new system is analyzed by comparing the finite element calculation results with the third party real bridge test data. The results show that the steel-STC composite deck structure greatly improves the stiffness of the deck. The peak value of strain and vertical displacement of each control point of orthotropic bridge deck plate of new paving system decreased by 46.82% and 90.89%, and the improvement effect was far better than that of the original asphalt pavement material. The tensile strength of the original asphalt pavement 7.97MPa material could completely meet the stress requirement of maximum tensile stress. The new system of steel bridge pavement based on thin layer STC can effectively reduce the stress and deformation of steel bridge deck structure, improve the stress condition of pavement, and eliminate the risk of fatigue cracking, pavement cracking and rutting of steel bridge deck.
【作者单位】：湖南大学土木工程学院;广西交通规划勘察设计研究院;
【基金】：国家自然科学基金项目(51178177) 交通运输部重大科技专项项目(2011 318 494 160)
【分类号】：U443.33;U441

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