复杂受力状态下钢管复合桩粘结性能试验研究  

Experimental study on bond behavior of steel tubular composite pile under complex stress condition

作　　者：张敏[1] 马建林[1] 吴伟胜 谢红兵 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中交公路规划设计有限公司,北京100088 [3]港珠澳大桥管理局,广东珠海519015

出　　处：《华中科技大学学报（自然科学版）》2013年第9期67-71,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：铁道部重大科技项目(2008G032-F)

摘　　要：为研究轴压一弯矩一剪力复杂受力状态下，钢管内壁剪力环、泥皮和防腐涂层不同组合下的钢管复合桩粘结滑移性能，开展了四组钢管复合桩推出试验，其中两组带有剪力环，破坏形式均为桩端部钢管屈曲破坏．试验研究结果表明：剪力环对钢管复合桩粘结强度的影响十分明显，在本试验条件下，钢管复合桩平均粘结强度取值范围为0．242～0．404MPa，剪力环的存在使其平均粘结强度提高67％．粘结破坏时钢管与核心混凝土相对滑移量均小于0．2mm．在泥皮、防腐涂层和剪力环间距30cm的条件下，钢管与核心混凝土二者粘结可靠．另外，剪力环对钢管复合桩的受力和变形影响显著，使其整体性和延性有较大提高．To investigate the bond slip behavior of steel tubular composite piles （STCP） with different combinations of shear ring, drilling mud skin and anticorrosion coating under compression-bending- shear, four groups push out test of STCP were carried out, in which two groups with shear ring, local buckling of pile end steel tube of tests. The results obtained from the tests show that shear ring have a very obvious impact on the bond strength of STCP. The average bond strength of STCP is in the range of 0. 242-0. 404 MPa, which is increased by 670% because of shear ring. The relative slip be- tween steel tube and concrete is less than 0.2 mm. When the shear ring spacing is 30 cm, the bond be- tween steel tube and core concrete is reliable. In addition, shear ring have a significant influence on force and deformation of STCP, as well as the integrity and ductility improved.

关 键 词：钢管复合桩 推出试验 剪力环 泥皮 防腐涂层 粘结滑移性能 

分 类 号：TU473.1[建筑科学—结构工程]