建坝工程对桥梁结构安全影响分析  

ANALYSIS OF THE IMPACT OF DAM CONSTRUCTION ON BRIDGE STRUCTURAL SAFETY

作　　者：覃倚 QIN Yi(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074

出　　处：《低温建筑技术》2024年第10期137-140,共4页Low Temperature Architecture Technology

摘　　要：为研究建坝工程对桥梁结构安全的影响,文中结合西河大桥工程实例,通过有限元分析,研究其下游建设拦坝工程对西河大桥结构安全的影响。通过分3组不同冲刷情况进行分析,比较建坝前后结构强度、刚度、稳定性的改变。研究结果表明,在建坝后西河大桥的最不利压应力增量约为建坝前的1.46%,作用荷载变化对桥梁结构安全的影响较小。主梁、桥墩等主要受力构件的变形和建坝前相比的最大增加量约为0.18%,可以忽略不计,桥梁结构的稳定性系数基本相同。综合分析判断建坝工程对西河大桥的结构安全影响极小,研究可为类似工程提供参考和借鉴。To investigate the impact of dam construction on bridge structural safety,this study uses the Xihe Bridge project as a case study.Through finite element analysis,the effects of downstream dam construction on the structural safety of Xihe Bridge were examined.The analysis was performed in three scenarios with different scour conditions,comparing the changes in structural strength,stiffness,and stability before and after dam construction.The results indicate that the most adverse compressive stress increment in Xihe Bridge after dam construction is approximately 1.46%of the value before construction,suggesting that the changes in load effects have a minor impact on the bridge's structural safety.The maximum deformation increase in key load-bearing components,such as the main girder and bridge piers,is about 0.18%compared to before dam construction,which is negligible.The stability coef-ficients of the bridge structure remain essentially unchanged.Overall,the analysis concludes that the impact of dam construction on the structural safety of Xihe Bridge is minimal.The findings provide valuable reference and insights for similar projects.

关 键 词：建坝工程 桥梁结构安全 稳定性系数 

分 类 号：TU997[建筑科学—市政工程]