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| 疲劳加载后预应力混凝土梁受力性能试验研究 | |
| 引用本文： | 汪小林,刘立新,于秋波. 疲劳加载后预应力混凝土梁受力性能试验研究[J]. 昆明理工大学学报(自然科学版), 2010, 35(1): 52-55. DOI: 10.3969/j.issn.1007-855x.2010.01.011 |
| 作者姓名： | 汪小林 刘立新 于秋波 |
| 作者单位： | 1. 同济大学,建筑工程系,上海,200092 2. 郑州大学,土木工程学院,河南,郑州,450002 3. 郑州大学,综合设计研究院,河南,郑州,450002 |
| 基金项目： | 国家自然科学基金资助项目(项目编号:50578148);;河南省交通厅计划资助项目(项目编号:2005P338) |
| 摘 要： | 通过对2根经250万次疲劳加载而未破坏的预应力混凝土梁进行静载受弯试验,研究疲劳加载对其剩余静载承载力、钢筋应力、刚度及裂缝等影响.试验结果表明,前期的疲劳加载对试验梁受力性能影响较小,各试验梁均发生正截面受弯破坏,破坏时有明显的延性破坏特征,并且其承载力与现行规范计算值相比有一定的安全储备.为评估既有预应力混凝土桥梁的受力性能及寿命提供一定的参考. |
| 关 键 词： | 疲劳荷载 预应力混凝土梁 受力性能 静载 |
Experimental Study on Performance of Prestressed Concrete Beams after Fatigue Loading |
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| WANG Xiao-lin,LIU Li-xin,YU Qiu-bo. Experimental Study on Performance of Prestressed Concrete Beams after Fatigue Loading[J]. Journal of Kunming University of Science and Technology(Natural Science Edition), 2010, 35(1): 52-55. DOI: 10.3969/j.issn.1007-855x.2010.01.011 | |
| Authors: | WANG Xiao-lin LIU Li-xin YU Qiu-bo |
| Affiliation: | 1.Department of Architecture/a>;Tongji University/a>;Shanghai 200092/a>;China/a>;2.School of Civil Engineering/a>;Zhengzhou University/a>;Zhengzhou 450002/a>;3.Multi-functional Design and Research Academy/a>;China |
| Abstract: | By the static flexural experiment on the two prestressed concrete beams,which have not fractured under 2.5 million times of fatigue loading,the effects of fatigue loading on the residual static bearing capacity,reinforcement stress,rigidity and crack width are studied.The experimental results show that the early fatigue loading has little effect on the testing beams,which fits in with the flexural failure model with significantly ductility,and the test bearing capacities have certain safety stock compared w... |
| Keywords: | fatigue loading prestressed concrete beam mechanical behavior static load |
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