| 铁路钢 混凝土结合梁动力响应试验研究 |
| Experimental Research on Dynamic Response of Railway Steel concrete Composite Beam Bridges |
| 投稿时间：2013-03-28 |
| 中文关键词:钢 混凝土结合梁 动力试验 动力响应 动力系数 滑移 |
| 英文关键词:steel concrete composite beam dynamic test dynamic response dynamic coefficient slip |
| 基金项目:国家自然科学基金(51108281)；国家支撑计划项目(2011BAJ09B02);河北省教育厅科研计划项目(2006141) |
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| 中文摘要: |
| 为了深入研究钢 混凝土结合梁桥动力响应的变化规律，以剪力连接度为参数设计了两组试验梁，分别进行了模型列车以不同速度和不同重量通过时的动力测试，得到了各试验梁跨中竖向动挠度、加速度和支座截面结合面相对滑移的时程曲线。试验结果表明：随着行车速度的增大，结合梁跨中挠度和结合面相对滑移都不是线性变化，但总体上呈上升趋势；随剪力连接度的减小，结合梁刚度下降，动力系数增加，且动力系数随行车车速和车辆重量的增加也均呈增大趋势。 |
| 英文摘要: |
| For further research of the dynamic response of steel concrete composite beams, two groups of test beams were designed with the shear connection degree as parameter and dynamic tests carried out separately when the model trains passed through the test beams with different speed and different weight. The time history curve of the vertical deflection and acceleration at the mid span, and the slip between the steel girder and concrete slab at end support were measured. The test results show that, the vertical deflection at mid span and the slip at end support both enlarge with the increase of model train’s speed, but don’t express linear change law; with the decrease of the shear connection degree, the beam’s stiffness reduces, but the dynamic coefficient increases; with the increase of the model train's speed and weight, the dynamic coefficient has an upward tendency. |
| 李帅,李运生,侯忠明.铁路钢 混凝土结合梁动力响应试验研究[J].石家庄铁道大学学报：自然科学版,2013,(4):1-6,37. |
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