双预应力混凝土梁试验与理论研究  

Test and theory study on bi-prestressed concrete beam

作　　者：赵少伟[1] 王铁成[1] 郭蓉[2] 刘猛[2] 

机构地区：[1]天津大学建工学院,天津300072 [2]河北工业大学土木工程学院,天津300132

出　　处：《河北农业大学学报》2007年第6期110-113,121,共5页Journal of Hebei Agricultural University

基　　金：天津市建委基金项目(2004-30)

摘　　要：双预应力混凝土梁的目的是为了减小较大跨度简支梁的梁高和自重,本文在研究双预应力混凝土梁理论的基础上,制作了4根模型梁并进行了静载试验。结果表明:双预应力混凝土梁中的预压钢管能够提供给混凝土有效的预拉应力,预压钢管与混凝土的锚固可靠,试验荷载作用下2者协调变形、共同工作;试验结束后卸载,梁体的挠度和裂缝均有较大程度的恢复,工作性能良好。In order to decrease member＇s height and weight effectively,bi-prestressed concrete technique can be used in big-span concrete girders.Based on the study of bi-prestressed concrete structure＇s theory,this paper presents an experimental study on static performance of four model beams.The test results show that the pre-compressive steel pipe could offer concrete effective pre-tension stress so that the anchorage between pipes and concrete is reliable to ensure their compatible deformation and well co-working under experimental load.Moreover,after unloading,the deformation and cracks recovered well.

关 键 词：双预应力 施工工艺 静载性能 锚固 

分 类 号：TU501[建筑科学—建筑技术科学]