同济大学学报（自然科学版）2025，Vol.53Issue(6)：851-859,9.DOI:10.11908/j.issn.0253-374x.24114
接缝处纵向钢筋连续预制混凝土节段梁试验研究
Experimental Study of Precast Segmental Beams with Steel Rebars Through Joints
摘要
Abstract
Precast concrete segmental girder bridges play a vital role in urban infrastructure construction.To address the problem of reinforcement discontinuity at joints in conventional designs,this study proposes a new joint scheme with steel rebars through joints,ensuring continuity of longitudinal reinforcement.The primary objective is to improve the cracking resistance and long-term durability of segmental girders.A series of load tests on simply supported segmental beams,combined with numerical analysis,were conducted to compare the performance of the proposed joint with that of conventional joints.Key parameters such as cracking load,ultimate load capacity,deformation behavior,and failure modes were systematically evaluated.The results demonstrate that incorporating steel rebars through joints significantly enhances the cracking resistance of segmental beams.The proposed two-dimensional finite element model effectively simulates the entire loading process of segmental girders with both continuous and conventional joints.In addition,a simplified formula for predicting ultimate load capacity is developed,offering improved accuracy in structural performance evaluation.These findings suggest that the use of steel rebars through joints provides a promising design approach to improve the engineering performance and practical applicability of precast concrete segmental girders.关键词
接缝/纵向钢筋连续/预制节段梁/大剪跨比/有限元模型Key words
joint/steel rebars through joints/precast segmental beam/high shear span ratio/finite element model分类
土木建筑引用本文复制引用
端木祥永,俞承序,邹宇,王胜斌,徐栋..接缝处纵向钢筋连续预制混凝土节段梁试验研究[J].同济大学学报（自然科学版）,2025,53(6):851-859,9.基金项目
国家自然科学基金(52078363) （52078363）
