摘要
采用MIDAS有限元软件建立了71m先简支后连续预应力混凝土箱梁模型,分析了温度变化对后连续浇注接缝处关键截面应力的影响,并对后连续区采用体外预应力配筋与传统的体内预应力配筋两种情况下预应力筋锚固处应力变化、湿接缝处各截面正应力值、内力值进行了详细的分析比较,得到了一些有益的结论,以便后续桥梁设计者进行参考。
The 71m simply supported-continuous pre-stressing concrete box beam model is established with MIDAS finite element.The effect of temperature change to key section at continuous casting joint is analyzed and some useful conclusions are achieved to provide reference for follow-up bridge designers through the comparative analysis on stressing change at pre-stressing anchor bar,section positive pressure value and internal force at moist joint between external pre-stressing reinforcing bars and traditional internal pre-stressing reinforcing bars to continuous areas.
出处
《北方交通》
2010年第12期51-53,共3页
Northern Communications
关键词
先简支后连续
内力
湿接缝
体外预应力
有限元
Simply supported-continuous
Internal force
Moist joint
External pre-stressing
Finite element
