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| 大跨度混凝土桥梁预应力空间效应分析 | |
| 引用本文： | 汪劲丰,项贻强,徐兴.大跨度混凝土桥梁预应力空间效应分析[J].浙江大学学报(自然科学版 ),2005,39(1):154-159. |
| 作者姓名： | 汪劲丰 项贻强 徐兴 |
| 作者单位： | 汪劲丰（浙江大学,交通工程研究所,浙江,杭州,310027） 项贻强（浙江大学,交通工程研究所,浙江,杭州,310027） 徐兴（浙江大学,交通工程研究所,浙江,杭州,310027） |
| 摘 要： | 针对传统的平面杆系理论无法客观分析预应力混凝土桥梁中多向预应力效应的问题,运用实体退化单元,将预应力筋作为结构的一部分,用等效节点荷载模拟预应力效应.采用该方法对临海大桥(斜拉桥)预应力的空间效应进行了分析.分析结果表明,预应力明显改善了桥梁的正常使用状态,多向预应力的空间效应明显;该预应力空间效应分析方法客观模拟了预应力的空间效应,为进一步完善预应力桥梁的设计提供了依据. |
| 关 键 词： | P.C.桥梁 预应力 空间效应 实体退化单元 |
| 文章编号： | 1008-973X(2005)10-0154-06 |
| 修稿时间： | 2003年8月18日 |
Research on spatial effect of prestressing force in long-span concrete bridge |
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| HONG Jin-Feng,XIANG Yi-Jiang,XU Xin.Research on spatial effect of prestressing force in long-span concrete bridge[J].Journal of Zhejiang University(Engineering Science),2005,39(1):154-159. | |
| Authors: | HONG Jin-Feng XIANG Yi-Jiang XU Xin |
| Abstract: | The conventional planar beam theory can't be used to analyze the actual effect of spatial prestressing force. In this work, degenerated solid elements were used to take prestressed reinforcement as a part of the structure, and equivalent node load was provided to simulate the effect of the prestressing force. By the method, the effect of prestressed reinforcement in Linhai cable-stayed bridge was discussed. The result of analysis showed that the prestressing force markedly improved the bridge's service state; and that its spatial effect was very obvious. This method can effectively simulate the spatial effect of prestressing force, and can ensure success in the design of prestressed concrete bridge. |
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