预制节段拼装城市高架桥梁结构体系分析  

Structural System Analysis of Prefabricated Segment Assembled Urban Viaduct

作　　者：张智然 ZHANG Zhi-ran(Shanghai Municipal Engineering Design&Research InstituteCo.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《中国市政工程》2024年第3期81-84,157,共5页China Municipal Engineering

摘　　要：为研究预制节段拼装城市高架桥梁适宜的结构体系,以江西省南昌市洪都大道3×35m预制节段拼装桥梁为背景,通过建立空间杆系有限元模型,分别研究中墩固结、边墩固结的全固结体系和中墩固结、边墩设支座的半固结体系下结构的受力性能。然后在全固结体系下,研究桥墩刚度、预制节段梁龄期对结构受力的影响。研究结果表明:预制节段拼装城市高架桥梁采用中墩固结、边墩设支座的半固结体系具有更好的综合性能;减小桥墩抗推刚度、增加预制节段存梁时间可显著改善结构的受力性能。To study the appropriate structural system of precast segmental assembled urban viaduct,taking the 3×35 m precast segmental assembled bridge on Hongdu Ave.in Nanchang,Jiangxi as the background,the mechanical performance of the structure under the fully consolidated system of middle pier consolidation and side pier consolidation and the semiconsolidated system of middle pier consolidation and side pier with support is studied by establishing the spatial bar finite element model.Then,under the fully consolidated system,the influence of pier stiffness and the age of precast segmental beam on the stress of the structure is studied.The results show that the semi-consolidation system with middle pier consolidation and side pier support has better comprehensive performance;reducing the thrust stiffness of bridge piers and increasing the storage time of precast segments can significantly improve the mechanical performance of the structure.

关 键 词：预制节段拼装桥梁 连续刚构 结构体系 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]