摘要
以一主跨125m连续梁桥为例,采用Ansys10.0软件,计算分析混凝土箱梁温度场及横向温度应力的分布规律,并对箱内、外温差的取值进行了探讨。混凝土箱梁横向温度应力较大,特别是顶板下缘由温度引起的拉应力可以达到3.5MPa,易造成箱梁顶板的纵向开裂,这应引起设计者的重视。
With a continuous girder bridge of 125m main span as an example, the distribution law of concrete box girder temperature field and transverse thermal temperature stress is calculated using Ansys 10.0, and the temperature difference of box is also discussed in this paper. The transverse thermal stress of concrete box girders is bigger, especially at lower roof, tensile stress caused by temperature can reach 3.5 MPa, it is easy that the longitudinal cracks appear on the roof of box girder, the attention should be paid for designers.
出处
《低温建筑技术》
2012年第8期68-70,共3页
Low Temperature Architecture Technology
关键词
桥梁工程
横向温度应力
温度场
混凝土箱梁
bridge engineering
transverse thermal stress
temperature field
concrete box girder
