高速公路30 m UHPC无腹筋预应力U型节段组合梁抗弯承载能力足尺试验研究  

Full-scale experimental study on flexural bearing capacity of 30 m UHPC prestressed U-section composite beam without web reinforcement

作　　者：马瑞东 王亮 范学明[2] 赵英爱 马玉全 MA Ruidong;WANG Liang;FAN Xueming;ZHAO Ying′ai;MA Yuquan(Power China Road Bridge Group Co.,Ltd.,Beijing 100160,China;South China University of Technology,Guangzhou 510641,China;Guangzhou Dingxing Civil Engineering Technology Co.,Ltd.,Guangzhou 510440,China)

机构地区：[1]中电建路桥集团有限公司,北京100160 [2]华南理工大学,广东广州510641 [3]广州鼎兴土木科技有限公司,广东广州510440

出　　处：《混凝土》2024年第10期132-136,共5页Concrete

基　　金：中电建路桥集团有限公司科技项目(LQKY2021-02);交通运输部2021年度交通运输行业重点科技项目(2021-MS1-021);国家自然科学基金(52278501,52278181);广东省地震工程与应用技术重点实验室开放基金(2017B030314068)。

摘　　要：中开高速公路改扩建工程中首次在高速公路中大规模采用30 m跨度的UHPC无腹筋预应力U型节段组合梁,充分利用了新型桥梁质量轻、整体性好、耐久性优异的特点。成果是世界首次针对这种梁型开展足尺寸抗弯承载能力试验。详细介绍了新型结构的力学特点和试验结果。研究结果表明:UHPC无腹筋预应力U型节段组合梁具有承载能力高、结构延性优异的特点。In the reconstruction and expansion project of Zhongkai Expressway,the 30-meter-span UHPC pre-stressed U-shaped segmental composite beam without web reinforcement was first adopted on a large scale in the expressway,taking full advantage of the characteristics of the new bridge,such as light weight,good integrity and excellent durability.The result is the first full-scale bending capacity test for this beam type in the world.It introduces the mechanical characteristics and test scheme of the new structure in detail,and analyzes and studies the results of full-scale test and finite element simulation.The research results show that UHPC prestressed U-shaped segmental composite beam without web reinforcement has the characteristics of high bearing capacity,good economy and excellent structural ductility.

关 键 词：无腹筋 预应力 超高性能混凝土 桥梁 

分 类 号：TU528.7[建筑科学—建筑技术科学]