预应力筋约束农业设施混凝土柱中心局部承压性能分析
摘要
代替传统的局部受压处理方法。使用有限元分析软件 ANSYS,对预应力钢绞线约束下的素混凝土方形柱进行中心局部受压模拟分
析,结果表明,钢绞线约束的素混凝土柱仍然存在压应力带。同时,局压面积比对横向应力的分布形状影响较大,局压面积比的增
加能明显的降低局压试件的承载力。局压荷载作用下预应力钢绞线约束的素混凝土构件与相应的素混凝土构件的纵向应力分布状态
不同。局压面积比对纵向应力的扩散速度影响较大。局压面积比的增加能明显的降低局压试件的承载力。总体来看,在素混凝土构
件横向拉应力的峰值位置附近布置预应力钢绞线,能使压应力带下方原本为拉应力的区域在预应力的作用下转为受压,进而约束了
混凝土柱,使其局压承载力有所提高。
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技术大学农业工程学院 ,邮编:530007, 副教授,博士研究
生, 从事建筑结构、农业建筑环境与能源工程、土壤改良、园
艺设施等方向研究。
DOI: http://dx.doi.org/10.12361/2661-3522-05-07-144512
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