体外预应力索加固大跨径连续刚构桥空间受力计算分析  

The Space Calculation Analysis of Large Span Continuous Rigid Frame Bridge Strengthened by External Prestress Tendon

作　　者：郑伟 吴毅彬 袁鑫[2] 苏江峰 

机构地区：[1]上海颖川加固工程技术有限公司,上海市201104 [2]东南大学,南京市210096

出　　处：《公路》2014年第1期26-30,共5页Highway

摘　　要：采用有限元软件对某大跨径连续刚构桥进行空间理论计算,分析了体外预应力索加固后的桥梁应力、承载力、挠度变化规律,并和加固前的原桥线形进行对比分析,计算结果和现场实际监测结果基本吻合,验证采用考虑桥梁的纵向抗弯加固效应的计算方法和空间钢束布置方法的合理性,研究计算方法可供同类工程参考借鉴。In this paper the authors make a three-dimentional analysis for the large span continuous rigid frame bridge based on the finite element software, and obtain the data of stress, bearing capacity, and deflection change rule after strengthened by external prestress tendon. Furthermore, the data for original bridge line and that for strengthened by external prestress tendon are compared. The calculation results and the actual monitoring results are consistent with each other, which verify the correctness of the three-dimentional calculation method considering the bridge longitudinal flexural reinforcement effect and the rationality of the design of the layout method of spatial steel beam reinforcement. The calculation method can be applied to similar projects.

关 键 词：连续刚构桥 体外预应力索 加固 空间理论 计算分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]