Abstract
In this study, an experimental investigation had conducted for six high strength laced reinforced concrete one-way slabs to discover the behavior of laced structural members after being exposed to fire flame (high temperature). Self-compacted concrete (SCC) had used to achieve easy casting and high strength concrete. All the adopted specimens were identical in their compressive strength of ( , geometric layout 2000 750 150 mm and reinforcement specifics except those of lacing steel content, three ratios of laced steel reinforcement of (0.0021, 0.0040 and 0.0060) were adopted. Three specimens were fired with a steady state temperature of for two hours duration and then after the specimens were cooled suddenly by spraying water. The simply supported slabs were tested for flexure behavior with two line loads applied in the middle third of the slab (four-point bending test). The average residual percentage of cubic compression strength and splitting tensile strength were 57.5% and 50% respectively. The outcomes indicated that the residual bending strength of the burned slabs with laced ratios (0.0021, 0.004, 0.006) were (72.56, 70.54 and 70.82%) respectively. However; an increase in the deflection was gained to be (11.34, 14.67 and 17.22%) respectively with respect to non-burned specimens.
Highlights
Normal reinforced concrete (NRC) is known to have bounded ductility and confinement of concrete, NRC can be enhanced by appropriate amendment in materials of concrete and by considering suitable alteration in the reinforced details
Considerable researches have studied the behavior of laced element under static and dynamic loads, in addition the use of laced reinforcement for blast resistant structures that leads to an urgent need to study the behavior of laced reinforced members exposed to fire flame
The experimental program included testing three reinforced concrete one-way slabs that non-burned to study the effect of laced reinforcement on one-way slab
Summary
Normal reinforced concrete (NRC) is known to have bounded ductility and confinement of concrete, NRC can be enhanced by appropriate amendment in materials of concrete and by considering suitable alteration in the reinforced details. Laced bars are reinforcing bars that extend in a direction parallel to the main reinforcement, they are bending into a diagonal manner between top and bottom reinforcement. Laced bars usually enclose temperature reinforcement bars which are placed outside the main reinforcement. Laced member is reinforced with two identical mats of steel bars for tension and compression. Laced reinforcement for concrete members improves the ductility and produces better confinement for concrete [1]. Considerable researches have studied the behavior of laced element under static and dynamic loads, in addition the use of laced reinforcement for blast resistant structures that leads to an urgent need to study the behavior of laced reinforced members exposed to fire flame
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
