EXPERIMENT RESEARCH ON BEARING BEHAVIOR OF POST-TENSIONED UNBONDED PRESTRESSED CONCRETE HOLLOW FLAT FLOOR
【Abstract】 In order to study the mechanical behaviors of post-tensioned unbonded prestressed concrete hollow flat floors,a 1 /4 scale post-tensioned unbonded prestressed reinforced concrete hollow slab-column structure model was made and test under the uniformly distributed load on the plate was done. The test results showed that the floor had a certain load carrying capacity. The deflection of concrete hollow flat floor by vertical load was a ‘bowl’shape. The point of maximan displacement was in the middle of concrete hollow flat floor. By means of finite element analysis methods,the calculation results showed that post-tensioned unbonded prestressed concrete hollow flat floor existed anisotropy with parallel circular-tubes. In parallel tube direction,the continuity of plate was destructed and the stiffness of the plate was decreased greatly. The plate deformation could still be regarded as continuous cross-plate in parallel tube directions and in vertical tube directions.
【Key words】 post-tensioned unbonded prestress； concrete hollow flat floor； mechanical behaviors； deflection；
- 【文献出处】 工业建筑 ,Industrial Construction , 编辑部邮箱 ,2015年01期