体外预应力连续梁折线形体外索几何参数对综合弯矩的影响  

Effects of Geometric Parameters of Continuous Linear Draped Tendons on Resultant Moment of External Prestressing Continuous Beams

作　　者：王少喻[1] 李文兴[1] 金凌志[1] 曹霞[1] 

机构地区：[1]桂林工学院土木工程系,广西桂林541004

出　　处：《桂林工学院学报》2007年第1期61-64,共4页Journal of Guilin University of Technology

基　　金：广西自然科学基金资助项目(桂科自0447095);广西教育厅科研项目(桂教科研[2004]20)

摘　　要：体外预应力广泛地应用于桥梁工程和其它预应力加固结构.介绍了预应力混凝土结构中有效偏心距这一概念,分析了预应力连续梁折线形体外索几何参数与固端弯矩的关系,通过对一三跨预应力连续梁的计算分析,为使体外索在整个结构中的效率达到理想状态,需要根据不同的荷载条件合理选择体外索的几何参数.External prestressing tendons are widely adopted in bridge engineering and structure strengthening. The conception of effective eccentricity is introduced , and the relationship of fixed-end moment and geometric parameters of draped linear tendon in prestressing continuous beams is analyzed. After three-span prestressing continuous beam is calculated, it is pointed out that designers need choose tendons geometric parameters properly in accordance with different external loading condition in order to obtain high efficiency of the tendons. Relevant suggestions for design are also presented. The main conclusions provides as references for designers in determining the tendons geometric parameters in the design of external prestressing structures.

关 键 词：连续梁 体外索 体外预应力 综合弯矩 次弯矩 有效偏心距 

分 类 号：TU323.301[建筑科学—结构工程]