原文传递
Behavior of structural macrosynthetic fiber-reinforced precast, prestressed hollow-core slabs at different flexure-to-shear ratios
| 题名： | Behavior of structural macrosynthetic fiber-reinforced precast, prestressed hollow-core slabs at different flexure-to-shear ratios |
| 正文语种： | 英文 |
| 作者： | Pradeep Kankeri; Sameer K. S. Pachalla; Nikesh Thammishetti; S. Suriya Prakash |
| 关键词： | Fiber reinforced; hollow-core slab; macrosynthetic fber; prestressed; shear span–to–depth ratio |
| 摘要： | Prestressed hollow-core slabs are generally precast concrete elements manufactured using an extrusion machine. Although prestressed hollow-core slabs are designed as uncracked members under service loads, cracking is unavoidable under excessive loading. The postcracking behavior of hollow-core slabs can be improved at very low cost by adding structural macrosynthetic fibers during the casting process with no modifications to the mixture proportions of zero-slump concrete. This paper examines the behavior of structural macrosynthetic fiber-reinforced hollow-core slabs at three different shear span–to–depth ratios a/d. Six full-scale tests were conducted on hollow-core slabs, of which three had no fiber additives and three had a polyolefin fiber dosage of 0.33%. The a/d values of 2.5, 3.75, and 7.5 were considered to evaluate the effect of macrofibers on the performance of hollow-core slabs. The test results indicate that the addition of macrosynthetic fibers increased the ultimate strength up to 19% with an increase in ductility. The contribution of fibers in improving the postcracking stiffness was better at higher a/d values under flexure-dominant behavior. Existing analytical models were suitably modified to predict the theoretical capacity of slabs with and without fibers. |
| 出版年： | 2019 |
| 期刊名称： | PCI-Prestressed Concrete Institute Journal |
| 期： | 3 |
| 页码： | 76-91 |
相关文献
- Shear strength of steel-fiber-reinforced deep hollow-core slabs
- Shear capacity of dry-cast extruded precast, prestressed concrete hollow-core slabs
- Strengthening of prestressed concrete hollow-core slab openings using near-surface-mounted carbon-fiber-reinforced polymer reinforcement
- Shear behavior of prestressed steel-fiber-reinforced concrete hollow-core slabs
- Modeling the Resistance of Precast, Prestressed Concrete Hollow-Core Slabs Exposed to Fire
- Shear strengthening of prestressed concrete hollow-core slabs using externally bonded carbon-fiber-reinforced polymer sheets
检索历史
应用推荐
