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。
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...
出处
《桥梁建设》
EI
CSCD
北大核心
2010年第2期55-57,共3页
Bridge Construction
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
prestressed concrete bridge
design code
temperature load
box girder
service stage
stress analysis
