高承载力钢板承插式牛腿受力性能试验研究  

Experimental research on mechanical properties of high load-bearingcapacity steel plate embedded corbel

作　　者：刘鸽 黄修平[1,2,3] 江晓阳 郑和晖 李刚[1,2,3] 高鑫林 LIU Ge;HUANG Xiu-ping;JIANG Xiao-yang;ZHENG He-hui;LI Gang;GAO Xin-lin(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei 430040,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040

出　　处：《中国港湾建设》2023年第11期63-69,共7页China Harbour Engineering

摘　　要：大跨桥梁超高桥塔的高速发展,对施工预埋件设计与施工的安全性、操作性、后期修复等方面提出了更高的要求。文中提出了一种钢板承插重型牛腿,该牛腿具有承载能力高(≥350 t)、可周转使用、对桥塔截面削弱小、易于修复等优点。通过数值分析与足尺加载试验,研究其受力性能及破坏模式。结果表明:钢板承插式牛腿在设计荷载作用下,牛腿应变-荷载大小基本呈线性,卸载后未出现明显的局部皱折和屈曲。锚固混凝土的破坏形态为受压侧冲切引起的斜裂缝,裂缝宽度满足限值要求,卸载后裂缝闭合,对永久结构无不利影响。钢板承插式牛腿受力性能良好,可作为大牛腿的选型,研究成果可为重型预埋件的进一步研究应用提供参考。The rapid development of ultra-high towers of long-span bridges has put forward higher requirements for the design and construction of embedded parts in terms of safety,operability,and post-repair.The paper proposes a steel plate embedded heavy-load corbel,which has the advantages of high bearing capacity(≥350 t),recycling use,small damage to the bridge tower,and easy repair.The mechanical behaviors and failure modes were studied by numerical analysis and full-scale loading test.The results show that curves of load-stress of the corbel show linear behavior,and there is no obvious wrinkle and buckling after test unloading.The failure modes of the anchored concrete is the oblique crack caused by punching,the crack width meets the limit requirements,and closes after test unloading,which has no adverse effect on the tower.The steel plate embedded corbel has good mechanical behaviors and can be used as a selection for large corbel.The study provides test data for further research and supports to the heavy-load embedded parts.

关 键 词：重型预埋件 钢板承插式牛腿 锚固区混凝土 开裂模态 局部受压 位移 

分 类 号：U655.4[交通运输工程—港口、海岸及近海工程]