摘要
对某既有钢筋混凝土拱肋的试验结果进行了较详尽的研究。首先基于静力和模态试验得出,既有拱肋的刚度并非一致下降,而具有波动变化的特征。然后基于模型修正技术,通过不断调整结构刚度参数以获得与试验结果相一致的策略,计算了该拱肋的初始刚度分布和加载各阶段的刚度分布。在此基础上研究了既有钢筋混凝土拱肋破坏过程中内力变化的一些规律。最后利用这些成果进行了极限荷载验证。结果表明基于内力变化规律来推求极限荷载的方法具有较高精度。
Experimental results were studied in detail for an existing reinforced concrete arch rib.Based on the static and modal experimental results,it is found that the stiffness of the existing reinforced concrete arch rib reduces not consistently but holds the characteristic of fluctuation.Then the stiffness distributions of the arch rib in the initial state and each loading step were calculated with the strategy that the calculated results should be consistent with the test results through model updating.On this basis,some conclusions on the internal force change in the failure process of the existing reinforced concrete arch ribs were obtained.Finally,the ultimate load verification was performed with the application of these conclusions.The result shows that the method for obtaining the ultimate load with the law of internal force changes is accurate.
出处
《公路交通科技》
CAS
CSCD
北大核心
2011年第1期68-73,共6页
Journal of Highway and Transportation Research and Development
基金
交通部西部交通建设科技资助项目(200631800019)
长沙理工大学桥梁与隧道工程重点学科基金资助项目
湖南省科技计划项目(2010FJ3172)
关键词
桥梁工程
钢筋混凝土拱肋
模型修正
极限承载能力
损伤
bridge engineering
reinforced concrete arch rib
model updating
ultimate bearing capacity
damage
