摘要
依据30m跨径预应力砼足尺空心板梁的试验研究,分析了其沿预应力钢束纵向开裂的原因,提出在薄壁箱形预应力砼结构设计中,在考虑获得所需纵向预应力的同时,应计入泊松效应和预应力钢束对构件变形产生的反向作用力的不利影响.
Based on the experiment of a 30m-span prestressed concrete box-beam, the longitudinal cracks along prestressed tendons are studied. It is suggested that the disadvantageous influences from both Poisson effect and opposite acting force resulting from the deformation of beams should be taken into consideration for thin-wall structures.
出处
《重庆交通学院学报》
2005年第2期8-11,共4页
Journal of Chongqing Jiaotong University
关键词
空心板桥
纵向裂缝
泊松效应
反向作用力
prestressed concrete box-beams
longitudinal crack
poisson effect
opposite acting force
