基于损伤迭代模型的高墩大跨连续刚构桥斜拉体系改造技术  

Reconstruction Technology of Cable-Stayed System of High Pier and Long Span Continuous Rigid Frame Bridge Based on Damage Iteration Model

作　　者：贺鹏 耿永魁 周波 HE Peng;GENG Yongkui;ZHOU Bo(Shaanxi Jiaokong Kaida Road and Bridge Engineering Construction Co.,Ltd.,Xi'an 710075,China)

机构地区：[1]陕西交控凯达路桥工程建设有限公司,西安710075

出　　处：《结构工程师》2025年第2期158-167,共10页Structural Engineers

摘　　要：以云南某高墩大跨连续刚构桥加固改造为依托,提出一种基于实测桥面线形数据的有限元计算模型修正方法。通过对影响桥面线形的敏感参数进行迭代计算,将模型修正问题转变为控制目标参数值与实测数据值的误差最小优化问题,据此可预测不同时期桥梁的损伤程度,并通过实测数据证明了模型修正的准确性。重点介绍了基于零号块改造的斜拉体系加固高墩大跨连续刚构桥的设计方案,为后续同类桥梁维修加固提供借鉴。Based on the reinforcement and reconstruction of a long-span continuous rigid frame bridge with high piers in Yunnan province,a sensitivity analysis method to predict the damage degree of the bridge based on the measured bridge floor alignment is proposed,which provides a theoretical basis for the parametric modification of the finite element model of the bridge.Through iterative calculation of the sensitive parameters that affect the alignment of the bridge floor,the problem of model correction is transformed into an optimization problem of the error minimization between the control target parameter values and the measured data values,according to which the damage degree of the bridge in different periods can be predicted.The design scheme of the cable-stayed system reinforced long-span continuous rigid frame bridge with high piers based on the reconstruction of“No.0 block”is emphatically introduced,which provides reference for the subsequent maintenance and reinforcement of similar bridges.

关 键 词：高墩大跨连续刚构桥 跨中下挠 模型修正 斜拉体系加固 体外预应力加固 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]