Rational Use of High-Strength Concrete in Flat Slab- Column Connections under Seismic Loading

2020 ◽  
Vol 117 (6) ◽  
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Seismic Loading ◽  
Flat Slab ◽  
Rational Use ◽  
Strength Concrete

scholarly journals Load-defl ection behaviour of hybrid concrete flat slab

2019 ◽  
Vol 28 (4) ◽  
pp. 516-525 ◽  
Author(s):  
Ragheed Makki ◽  
Haider Al-Katib ◽  
Ahmed Alalikhan
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Tension Zone ◽  
Compression Zone ◽  
Normal Strength Concrete ◽  
Flat Slab ◽  
Strength Concrete ◽  
Flat Slabs ◽  
Tension And Compression ◽  
Normal Strength

Due to the important role of high strength concrete in the structural systems, present work focuses on the use of this material as a strengthening technique incorporating with the normal strength concrete in flat slab system. Eight simply supported flat slab models with (1,000 × 1,000 × 120 mm) dimensions are investigated based on three groups including normal strength concrete and high strength concrete. The first group represents models containing of two flat slabs fully with one type of concrete; NSC and HSC as control flat slab. The second and third groups consist of six flat slabs as hybrid flat slabs of two layer of concrete with different thicknesses. Concrete mixture HSC was used in tension zone in three hybrid flat slabs (second group) with three thicknesses (30, 60 and 90 mm), while the remaining three hybrid flat slabs (third group) was used the HSC in compression zone with the same previous thicknesses. The experimental results shown that the ultimate load increased about (19.4%) when HSC was used fully (hH / h = 1) instead of using NSC in the control flat slab (NSC slab). The hybrid flat slabs with use HSC in compression zone showed higher in cracking and ultimate flexural loads compared with those of the hybrid flat slabs with use HSC in tension zone and also were stiffer in load-defl ection curve with the hybrid flat slabs with HSC in tension zone, also the hybrid flat slabs showed an improvement in the cracking load and ultimate flexural load when increasing the thickness of the HSC layer (hH / h) in both tension and compression zone as compared to control flat slab (NSC slab).

Behavior of High-Strength Concrete-Filled FRP Tube Columns under Simulated Seismic Loading: An Experimental Study

2013 ◽  
Vol 743 ◽  
pp. 39-44
Author(s):  
Yunita Idris ◽  
Togay Ozbakkloglu
Keyword(s):  
Experimental Study ◽  
High Strength Concrete ◽  
Axial Load ◽  
Seismic Behavior ◽  
High Strength ◽  
Seismic Loading ◽  
Load Level ◽  
Experimental Program ◽  
Strength Concrete ◽  
Frp Tube

This paper reports on part of an ongoing experimental program at The University of Adelaide on the seismic behavior of high-strength concrete (HSC)-filled fiber reinforced polymer (FRP) tubes (HSCFFTs). The results from three square concrete-filled FRP tube (CFFT) columns that were tested under combined constant axial compression and reversed-cyclic lateral loading are presented. The main parameters of the experimental study included the axial load level, concrete strength, and FRP tube corner radius. The results indicate that square HSCFFT columns are capable of developing very high inelastic deformation capacities under simulated seismic loading. The results also indicate that increasing the corner radius beyond a certain threshold value provides no increase in column lateral drift capacities. It was observed that column deformability decreased with an increase in axial load level (P/Po) and concrete compressive strength (fc). The results of the experimental program are presented together with a discussion on the influence of the main parameters on the seismic behavior of CFFT columns.

Behavior of high-strength concrete interior slab-column connections with openings under seismic loading

2019 ◽  
Vol 214 ◽  
pp. 619-630 ◽  
Author(s):  
Ahmed M. Yousef ◽  
Salah E. El-Metwally ◽  
Hamed H. Askar ◽  
Mahmoud A. El-Mandouh
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Seismic Loading ◽  
Strength Concrete
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