Papers by Keyword: Unbonded Prestressed

Abstract: The paper introduced that application of unbonded prestressed for the large structure of oxidation ditch,the application can improved the integrity of the structures of the pool wall.Emphasized that it should be pay attention to the construction process control when construct. Ensure that the effect of the prestressed.

Abstract: On account of unbonded prestressed concrete construction technology is a high demand specialized, strict operation, high technical content job [, so the construction quality control study of unbonded prestressed concrete play a vital role to the quality of the structure construction, impact the quality of the whole project. In view of this, this paper analysis and inductive the main point of it from three stages: before, under and after the construction, expect to play a role of reference and guidance to the engineering practice.

Abstract: Crack width, deflection and load bearing capacity of two-span concrete continuous beams partially prestressed with unbonded carbon fiber reinforced polymer (CFRP) tendons can be calculated accurately, the first premise is to calculate reasonably the stress increment of CFRP tendons. However, the law of stress increment of unbonded tendons is unclear. Moment-curvature analysis method and deformation compatibility condition were used to compile nonlinear full-range analysis programs of this kind of continuous beam. The comparison between simulated results and tested results of stress in CFRP tendons indicates that the simulation analysis programs are reliable.

Abstract: Owing to the outstanding advantages of unbonded prestressed technology, it has been widely used in high-rise building floor. However, with the continuous improvement of the function requirements of the building, the boards with openings become more and more common, not only in new constructions but also in renovation projects. These holes will change the mechanical properties of the original floor, and cause stress concentration around the holes easily. This article carries on the simulation analysis by modeling the experimental model using ANSYS software, focuses on the deflection, crack and ultimate load of unbonded post-tensioned prestressed concrete board with open-hole (under uniform load in tensioning and loading stage). After making the comparative analyses to the mechanical behavior and failure mechanism under the different locations of the holes, the simulation results are compared with experimental results, shows that ANSYS can simulate the whole process of loading better, provides theoretical basis for its application and promotion in practical engineering.