摘要
常山南门溪大桥为钢管混凝土提篮拱桥,拱肋施工正处于冬季,针对该桥拱肋采用集束式钢管混凝土结构,截面混凝土所占比例较大,钢管又相对薄弱的情况,采用LUSAS通用有限元软件,分析拱肋混凝土水化热,对拱肋水化热产生的温度场及温度应力进行计算。分析表明:冬季施工拱肋混凝土水化热引起的温度梯度大,温度应力明显,在施工与监控过程中应考虑其影响。
The Nanmen Creek Bridge in Changshan is a concrete-filled steel tube（CFST） basket handle arch bridge and the construction of the arch ribs of the bridge was right in the winter season.In the light of the characteristics that the clustering type CFST structures were chosen for the arch ribs of the bridge,the concrete accounted for a large proportion in the sectional area of an arch rib and the steel tubes were relatively weak,the universal LUSAS software was used to conduct the analysis of hydration heat of the concrete and the temperature field and temperature stress arising from the hydration heat were calculated.The results of the analysis indicated that the temperature gradient due to the concrete hydration heat of the arch ribs constructed in the winter season was great and the temperature stress was significant.The influence of the temperature gradient and stress should be thus considered in the construction process and in the construction monitoring and control.
出处
《桥梁建设》
EI
CSCD
北大核心
2010年第3期29-32,46,共5页
Bridge Construction
关键词
拱桥
钢管混凝土结构
拱肋
水化热
温度场
温度应力
arch bridge
concrete-filled steel tube structure
arch rib
hydration heat
temperature field
temperature stress
