摘要
针对公路建设中出现的高桥台开裂问题进行对比试验研究。设计制作4种尺寸相同的10∶1桥台模型,其中3个桥台模型采用不同构造加强形式,通过对4种桥台模型进行的填土加载和在填土表面施加外荷载,测量桥台前墙和侧墙外表面各点的水平位移进行对比分析,同时对4种高桥台模型进行三维数值计算与对比分析,得出不同构造加强形式高桥台的改进效果非常明显。试验结果表明,在桥台结构中同时采用内倒角和U型钢筋混凝土加劲构件的组合加强构造形式可以将桥台结构抵抗破坏能力提高1倍以上。
The cracking problem of high abutment is important in highway construction. Four U-shaped abutment models are built with clay bricks for the contrast study of failure mechanism. There are three models with different structural stiffeners and one is the model of common abutment. When these abutment models are loaded by filling with soil and applying vertically external forces on the surface of the filled soil,the horizontal displacements of the front wall and side wall of the models are measured by dial indicators. Through the contrast analysis of measured displacement and 3D numerical results for four models,a very obvious effect caused by the stiffeners in the abutment model is obtained. The crack loads of the abutment structure with the stiffeners will be improved obviously than the common abutment. If the inside chamfer of the abutment and U-shaped stiffeners are all adopted in an abutment model,the crack loads will be improved more than one time.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第S1期2727-2732,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
桥梁工程
石砌U型高桥台
开裂机制
内倒角
U型加劲构件
对比研究
bridge engineering
U-shaped high abutment with masonry-stone
crack mechanism
inside chamfer
U-shaped stiffeners
contrast study
