| 钢筋混凝土圆形桥墩正截面冲击承载力计算 |
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| 引用本文： | 樊文才,张南,许琦.钢筋混凝土圆形桥墩正截面冲击承载力计算[J].中南公路工程,2010(1):107-112. |
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| 作者姓名： | 樊文才 张南 许琦 |
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| 作者单位： | 南京工业大学土木工程学院; |
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| 摘 要： | 针对工程中频发的桥墩撞击事故，根据欧洲规范（CEB）推荐的率型经验公式，得到对应应变率效应的混凝土动态抗压强度及相应动态断裂应变、钢筋的动态抗压（拉）强度；基于材料动态强度的应力一应变关系，并考虑桥墩截面的局部削弱，推导出冲击荷载下圆形钢筋混凝土桥墩正截面极限承载力的分析和计算公式；在对试验数据分析的基础上，通过算例验证桥墩动态极限承载力计算方法的可行性，并建议了冲击荷载下材料应变率的取值范围。
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| 关 键 词： | 应变率效应 冲击 局部削弱 动态断裂应变 |
The Calculation of Bearing Capacity of the normal Section of RC circular Pier under compact |
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| FAN Wencai,ZHANG Nan,XU Qi.The Calculation of Bearing Capacity of the normal Section of RC circular Pier under compact[J].Central South Highway Engineering,2010(1):107-112. |
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| Authors: | FAN Wencai ZHANG Nan XU Qi |
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| Institution: | FAN Wencai,ZHANG Nan,XU Qi(College of Civil Engineering,Nanjing University of Technology,Nanjing,Jiangsu 210009,China) |
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| Abstract: | Aim directly at frequently accident of crash happened to bridge, according to statistical and experiential formula recommended by CEB, dynamic concrete intensity,fracture strain and dynamic Steel Bars intensity were obtained regarding of Strain Rate Effect; Based on The dynamic material stress- strain relationship and local weakening of bridge pier was taken into account, the calculation method of loading-bearing capacity of normal cross section was introduced ; Contrasting to test, the feasibility of textual mathod was validated. The parameter of the train rate under impact was advised. |
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| Keywords: | strain rate effect impacting local weakening dynamic fracture strain |
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