悬索桥钢管混凝土桥塔粘结滑移试验研究  

Experimental Research on Bond-slip of Concrete-Filled Steel Tube Tower of Suspension Bridge

作　　者：李爱军[1] 李丽园[1] 刘颖 谈军 路韡[2] 满自亭 刘世忠[1] LI Aijun

机构地区：[1]兰州交通大学,甘肃兰州730070 [2]西北民族大学,甘肃兰州730030 [3]甘肃省交通科学研究院有限公司,甘肃兰州730050 [4]兰州市自然资源局,甘肃兰州730000

出　　处：《福建建设科技》2022年第1期61-63,共3页Fujian Construction Science & Technology

基　　金：国家自然科学基金项目(51568036)。

摘　　要：为探究大直径钢管砼用于悬索桥桥塔时两种材料协同工作状态,得到桥塔结构钢管与内核砼界面粘结受力及在粘结界面破坏历程中的钢管外壁纵、横向应变(应力)的变化规律。依据相似原理,制作了跨库区悬索桥桥塔顶部节段模型并进行协同工作性能试验研究,进行了钢管混凝土结构外侧钢管应力分布及界面粘结滑移破坏过程中初始粘结应力及最大粘结应力测试,得到了加载过程中P-δ关系曲线;试验结果表明设计给出的3m钢管混凝土桥塔内部构造完全满足桥梁安全运营要求。In order to explore the cooperative working state of the two materials when the large-diameter steel tube concrete is used in the pylon of a suspension bridge,the bonding force between the steel tube and the inner core concrete of the pylon structure and the longitudinal and lateral strain( stress) of the outer wall of the steel tube during the failure process of the bonding interface are obtained. The law of change. Based on similar principles,a model of the top section of the pylon of a suspension bridge across the reservoir area was made and the collaborative performance test was conducted. The stress distribution of the outer steel tube of the concrete-filled steel tube structure and the initial bond stress and maximum bond during the failure process of the interface bond slip were carried out. The stress test has obtained the P-δ relationship curve during the loading process,the test results show that the internal structure of the designed 3m concrete-filled steel tube bridge tower fully meets the requirements of the safe operation of the bridge.

关 键 词：大直径钢管砼悬索桥塔 界面滑移 内核砼推出 粘结强度 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]