建筑结构学报2026，Vol.47Issue(5)：57-67,11.DOI:10.14006/j.jzjgxb.2025.0594
3D打印混凝土配筋桁架梁力学及疲劳性能试验研究
Experimental study on mechanical and fatigue properties of 3D printed concrete reinforced truss beams
摘要
Abstract
To reveal the mechanical behavior and fatigue damage evolution mechanism of reinforced 3D-printed concrete(3DPC)structures,this paper presents a systematic experimental investigation on the mechanical and fatigue performance of reinforced 3DPC truss beams.By comparing the mechanical responses of four typical truss configurations,namely parallel chord,trapezoidal,tension-compression optimized,and shape-optimized,under static loading,the influence of configuration on load-bearing capacity,deformability,and failure mode was analyzed.The results show that all truss beam configurations exhibited ductile flexural failure characterized by multiple cracking,similar to under-reinforced concrete beams,while notable differences were observed in their load-bearing efficiency,ductility,and material utilization.Subsequently,fatigue tests were conducted on the parallel chord configuration under different stress amplitudes.The results reveal that fatigue performance is controlled jointly by the 3DPC matrix and its interface with reinforcement,the presence of transverse constraints,and the properties of the steel reinforcement.The failure mode transitions from fatigue fracture of the reinforcement at low stress ranges to interface debonding at medium and high stress ranges.Based on the test results,a fatigue damage model suitable for reinforced 3DPC truss beams was proposed based on stiffness evolution,and a fatigue life prediction formula was established,providing a theoretical basis for performance assessment and fatigue design of these structures.关键词
桁架梁/3D打印混凝土/静力性能/构型优化/层间界面/疲劳性能Key words
truss beam/3D printed concrete/mechanical property/configuration optimization/interlayer interface/fatigue performance分类
建筑与水利引用本文复制引用
王里,王启晨,王强,马国伟..3D打印混凝土配筋桁架梁力学及疲劳性能试验研究[J].建筑结构学报,2026,47(5):57-67,11.基金项目
国家自然科学基金项目(52322804,52508261),天津市自然科学基金重点项目(23JCZDJC00360). （52322804,52508261）
