%0 Journal Article
%T 圆形截面覆土波纹钢桥涵长期受力性能试验研究<br>Experimental study on long term mechanical performance of buried round-pipe corrugated steel culverts
%A 刘保东
%A 徐伟博
%A 徐道涵
%A 刘鹏飞
%A 田子瀚
%J 北京交通大学学报
%D 2018
%R 10.11860/j.issn.1673-0291.2018.03.010
%X 摘要 以山东某多孔圆形截面波纹钢桥涵为依托，对其土压力和应力进行了长期监测和分析，发现温度和基础沉降对波纹钢桥涵长期受力性能有着较大影响.通过有限元模型具体分析了温度和基础沉降的影响，并对实测数据进行了修正，得出了波纹钢桥涵在填土施工完成后应力和土压力的长期发展规律.结果表明：在施工结束后长期作用阶段，管涵所受土压力变化主要受土体沉降密实的影响，土体沉降密实总体有利于土体与结构相互作用的发挥，而温度对光纤光栅传感器长期测试数据影响较大，去除该影响后各测点应力有所增长，但增长缓慢，且在一段时间以后，甚至有减小趋势，这与土压力长期变化趋势相互印证，说明波纹钢板桥涵长期受力性能将逐渐趋向对结构有利方向发展；基础沉降对管涵应力有一定影响，随沉降值逐渐增加，管中趋于受压，水平土压力也逐渐增加；而管顶趋于受拉，竖向土压力也逐渐减小，说明波纹钢桥涵对于基础沉降有较好的适应性.<br>Abstract：Based on a multi-span circular cross section of corrugated steel culverts in Shandong, it is found that temperature and foundation settlement have great influence on the long-term mechanical performance of corrugated steel culverts after long-term monitoring and analysis of its earth pressure and stress. To analyze the long-term development rule of stress and earth pressure of corrugated steel culverts after the completion of backfilling construction, the influence of temperature and foundation settlement is studied through finite element models,according to which the modified measured data. The results show that earth pressure is influenced by soil settlement after the completion of backfilling, which is generally beneficial to the soil-structure interaction. And temperature has great influence on the long-term test data of fiber grating sensor. The stress of the measuring points increases slowly after eliminating the influence of temperature, and after a certain time, it appears a decreasing trend. The changing tendency of stress is the same as that of earth pressure, indicating that the long-term mechanical performance of buried corrugated steel culverts is becoming more and more favorable. The foundation settlement has influence on the pipe stress. With the gradual increase in sedimentation value, the stress on the springline of the culvert is gradually compressed, and the horizontal earth pressure is also increasing. However, the stress on the crown of the culvert gradually pulled, and the vertical earth pressure is gradually decreasing, indicating that the corrugated steel culverts adapt well to foundation settlement.
%K 桥梁工程
%K 覆土波纹钢桥涵
%K 有限元分析
%K 温度
%K 基础沉降
%K 力学性能&lt
%K br&gt
%K bridge engineering
%K buried corrugated steel culverts
%K finite element analysis
%K temperature
%K foundation settlement
%K mechanical performance
%U http://jdxb.bjtu.edu.cn/CN/abstract/abstract3327.shtml