| 新旧规范梯度温度荷载对箱梁结构受力的影响 |
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| 引用本文： | 魏霞,郭峰祥,徐向锋. 新旧规范梯度温度荷载对箱梁结构受力的影响[J]. 桥梁建设, 2010, 0(2) |
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| 作者姓名： | 魏霞 郭峰祥 徐向锋 |
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| 作者单位： | 1. 湖北省交通规划设计院,湖北,武汉,430051
2. 山东交通学院,山东,济南,250023 |
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| 摘 要： | 《公路桥涵设计通用规范》对《公路钢筋混凝土及预应力混凝土桥涵设计规范》中的梯度温度荷载进行了重新定义。为研究新旧规范中不同梯度温度荷载对结构受力的影响,以1座三跨变截面连续箱梁为例,采用QJX软件进行结构分析计算。计算结果表明,新规范定义的梯度温度荷载对结构使用阶段受力影响较大,使结构受力更偏于安全;旧规范设计的结构可以通过增加梁高来改善结构的受力,使其能够满足新规范的要求。
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| 关 键 词： | 预应力混凝土桥 设计规范 温度荷载 箱形梁 使用阶段 应力分析 |
Impact of Gradient Temperature Load in Old and New Bridge Design Codes on Force Condition of Box Girder Structure |
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| WEI Xia,GUO Feng-xiang,XU Xiang-feng. Impact of Gradient Temperature Load in Old and New Bridge Design Codes on Force Condition of Box Girder Structure[J]. Bridge Construction, 2010, 0(2) |
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| Authors: | WEI Xia GUO Feng-xiang XU Xiang-feng |
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| Abstract: | The gradient temperature load in the Code for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts is redefined in the General Code for Design of Highway Bridges and Culverts.To study the impact of the different temperature load in the old and new codes on the force condition of structure,a three-span continuous box girder with variable cross section is cited as an example and the QJX software is used to analyze and calculate the structure.The results of the calculation demons... |
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| Keywords: | prestressed concrete bridge design code temperature load box girder service stage stress analysis |
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