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2004年06 期
| 标题 |
| 京山线沙河特大桥预应力混凝土梁提速加固设计研究(25 卷) |
| 英文标题 |
| Speed-increase Reinforcement Design for the Prestressed Concrete Beam of Shahe Extra-long Bridge on Beijing-Shanhaiguan Railway Line |
| 摘要 |
| 通过京山线沙河特大桥加固前后的静载试验以及体外预应力束疲劳性能试验，解决该桥上拱度过大引起梁的预应力损失及恒载增大，横向振动超限等问题。研究结果表明：采用增设体外预应力束加固后，实测梁体弹性上拱仅为2.5 mm，梁体的重裂弯矩可提高15.7%。在试验和理论计算分析的 |
| 作者 |
| 新闻作者:牛斌，李新民，马林 |
| 关键字 |
