装配式RC桥墩研究现状及展望

Research status and prospect of assembled RC piers

基于相关工程案例,对装配式桥墩的结构体系进行介绍;从结构受力性能、耐久性、施工便利性等角度,对不同类型装配式桥墩的优缺点进行分析比较。通过分析既有研究成果发现:既有研究大多集中于桥墩的抗震性能,涉及装配式RC桥墩的抗压、抗剪性能等研究较为少见,《公路装配式混凝土桥梁设计规范》(JTG/T 3365-05—2022)虽提出了装配式混凝土桥墩的结构计算方法,但尚未根据不同类型装配式桥墩的拼接构造特征提出相应的局部构造的极限承载力验算方法;《公路装配式混凝土桥梁设计规范》(JTG/T 3365-05—2022)、《公路装配式混凝土桥梁施工技术规范》(JTG/T 3654—2022)规定了部分类型装配式桥墩的构造要求、施工工艺,一些地方标准已涉及装配式桥墩的抗震设计、施工、验收等,可用于指导部分类型的装配式桥墩的设计与施工,但内容不全面。在此基础上提出装配式桥墩在结构设计、施工、质量管控等方面存在的不足以及今后的发展方向。

This analysis is based on relevant engineering cases in domestic and international contexts,the structural system of assembled bridge piers is introduced.The advantages and disadvantages of different types of assembled piers are analyzed and compared from the perspectives of structural stress performance,durability and construction convenience.Through analysis of the existing research results found that:most of the existing research focused on the seismic performance of the piers,but the research involving the compressive and shear performance of assembled RC piers is still relatively rare,Pacifications for Design of Highway Precast Concrete Bridges(JTG/T 3365-05—2022)although the structural calculation method of assembled concrete piers,but not yet according to the different types of assembled piers of the splicing structure characteristics,the corresponding limit of the local structure bearing capacity calculation method;Pacifications for Design of Highway Precast Concrete Bridges(JTG/T 3365-05-2022),Specifications for Construction of High Wary Precast Concrete Bridges(JTG/T 3654-2022)for some types of assembled piers construction requirements,construction techniques,some local standards have involved assembled piers seismic design,construction,acceptance,etc.These standards can be used to guide the design and construction of some types of assembled piers,but its content is still not comprehensive.On this basis,the shortcomings of assembled piers in structural design,construction,quality control and other aspects as well as the future development direction are proposed.