prestressed concretebeamsdeflectionstime-varyingsustained loadIn the design of prestressed concrete fl exural members it is necessary to allow for the longterm effects of creep and shrinkage, particularly in regard to defl ections and prestress loss. Various analytic methods can be used to evaluate ...
The method has also been used in a parallel study of shrinkage in prestressed slabs and beams. By introducing several simplifying assumptions into a one-step analysis, approximate, closed-form equations are derived for the loss of prestress and the curvature in a prestressed concrete beam section ...
5)Prestress loss in a prestressed concrete structure is due to concrete creep. 6) Concrete members will be subjected to loads as great as the design loads at an early age as a result of quick construction practices; this can result in deflections owing to cracking and low elastic modulus at...
Lead to stress losses in prestressed concrete creep 翻译结果2复制译文编辑译文朗读译文返回顶部 for prestressed concrete Seo changes result in stress loss; 翻译结果3复制译文编辑译文朗读译文返回顶部 For prestressed concrete creep caused stress loss
Test results also suggest that the instant stress loss at the interaction interface between concrete and GFRP bar was quite limited (less than 5%) in present test. Contributed proportion of each GFRP bar section was obtained to represent the creep behavior of the GFRP bar embedded in concrete. ...
creep in case (1) and it is known as total creep since it consists of drying creep as a consequence of moisture loss, as well as basic creep. 3. Concrete stored in water from age t o At age t, the measured strain, ε c , is comprised of the same elastic strain as in the previ...
concrete increases with moisture loss proportionally.The change in creep with the category of coarse aggregate is mainly due to the difference in the rigidity of coarse aggregates.The chemical admixture may modify the surface physic-chemical properties of pore liquid and hence the drying process as ...
Concrete shrinkage and creep on long-term prestress loss of significant influence 翻译结果4复制译文编辑译文朗读译文返回顶部 Long-term contraction of concrete and Seo changes on prestressed losses have a great impact on 翻译结果5复制译文编辑译文朗读译文返回顶部 正在翻译,请等待... 相关内容 aIf you do...
As articulated by Cusson and Mailvaganam [3], the lack of durability (or more accurately the lack of compatibility) in repaired structures manifests itself in spalling, cracking, scaling and subsequent loss of strength. Three major modes of failure in concrete patch repair systems have been iden...
loss of prestresslong-term deflectionsSimple design formulae are presented for evaluating the loss of prestress and the flexural deformations (and hence deflection) that occur in a prestressed concrete member as a result of long-term creep. The closed-form equations are approximate, but are ...