Analytical Study on Prestressed Concrete Sub-Frame Assembled by Post-Tensioning Considering Bond-Slip Chartacteristic Between Prestressing Steel and Concrete

Abstract

An analytical work was conducted on a prestressed eencrete sub − f亡ame assembled by pos 卜tensioning ． Layered element analysis consider − ing bond − slip characte 【 istics of prestressing tendon was used ． 皿 1e larger ratie of average effec 重 ivc prestress to compressive strength of conc τe重 e in the section and the smaller ratio ofaverage effective prestress to O2 ％ offset yield stress of 壮he tendon were assigned ， the larger difference of fiexural strength betWeen the cases with and withou 重consideration of bond −sHp was obse 四 ed ， Fu τthe ore ， the flexural behavio 【of 重 he member was significauUy influenced by the bond yield stress， while the effect of the bond stiffness was hardly found ．

Stress Analysis and Structural Optimization of Steel–Concrete Joint of Zhonghua Road Bridge in Liaocheng

“…Due to the differences in the materials of side span and main span and the stiffness discontinuity, stress tends to accumulate in the vicinity of steel-concrete joint of the hybrid girder. Besides, this section is found with a relatively large internal force, so it stands for a dangerous section and weak link of the entire bridge under structural stress [13][14][15], making it necessary to analyze force transfer mechanism in details. This bridge's steel-concrete joint adopts C50 low shrinkage concrete-filled rear bearing structure.…”