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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.17 [2010] >
IJEMS Vol.17(6) [December 2010] >
| Title: | Flexural capacity of singly reinforced beam with 150 MPa ultra high-strength concrete |
| Authors: | Shin, Sung-woo
Kang, Hoon
Ahn, Jong-mun
Kim, Do-woo |
| Keywords: | Ultra-high-strength-concrete
Maximum tensile steel ratio
Ductility
Flexural behavior |
| Issue Date: | Dec-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | In
this paper, we have studied the 150 MPa ultra-high-strength concrete (UHSC). RC
beam is reinforced by SD400 and SD500 bars to evaluate on range of maximum
tensile steel ratio which have reasonable ductility capacities and flexural
behaviors of UHSC through the flexural test. The reinforced
ultra-high-strength-concrete beam subjected to flexural moment behaves more
brittleness than the reinforced moderate strength concrete beam with equal reinforcement
ratio
(ρ/ρb, ρb=balanced steel ratio). In this study, 10 singly
reinforced rectangular beam specimens using 150 MPa concrete compressive
strength are tested to evaluate on flexural behavior. The ductility capacity of
UHSC flexural member without compression reinforcements significantly decrease.
Displacement ductility index indicates about 1.3~2.56 on
150 MPa UHSC. To
obtain the minimum ductility ratio with above 3.0 for double reinforced beam
and above 2.0 for singly reinforced beam, limit strain shall be set so that the
net tensile strain of outermost tensile steel may be above 0.006 in excess of
0.005 and the tensile steel ratio is required to be 0.55 ρb
or less. |
| Page(s): | 414-426 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.17(6) [December 2010]
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