摘要
为确定混凝土收缩徐变和预应力损失对大跨径连续刚构桥变形的影响,通过建立计算模型进行数值模拟分析。根据设计资料建立计算模型,分析计算结果得出:随加载龄期和相对湿度的增加,混凝土收缩徐变下降,所产生的挠度也下降;纵向预应力损失与挠度成正比,顶板预应力损失对桥梁挠度的影响高于底板。
To clarify the influences of shrinkage creep and prestress loss of the concrete on the deformation of the large⁃span continuous rigid frame bridge,the numerical simulation analysis was conducted by establishing the calculation model according to the design information.Analyzing the calculation results,it was indicated that with the increases in loading age and relative humidity,the shrinkage creep of the concrete decreased,as well as the produced deflection.The longitudinal prestress loss was proportional to the deflection.The prestress loss of the top plate has more influence than that of the bottom plate on the bridge deflection.
作者
段二兵
DUAN Erbing(Shanxi Jintong Highway Engineering Supervision Co.,Ltd.,Jincheng,Shanxi 048000,China)
出处
《山西交通科技》
2023年第5期63-65,126,共4页
Shanxi Science & Technology of Transportation
关键词
大跨径连续刚构桥
变形
影响因素
收缩徐变
预应力损失
large⁃span continuous rigid frame bridge
deformation
influencing factor
shrinkage creep
prestress loss