@article{(Open Science Index):https://publications.waset.org/pdf/2933,
	  title     = {Flexural Strength and Ductility Improvement of NSC beams},
	  author    = {Jun Peng and  Johnny Ching Ming Ho},
	  country	= {},
	  institution	= {},
	  abstract     = {In order to calculate the flexural strength of
normal-strength concrete (NSC) beams, the nonlinear actual concrete
stress distribution within the compression zone is normally replaced
by an equivalent rectangular stress block, with two coefficients of α
and β to regulate the intensity and depth of the equivalent stress
respectively. For NSC beams design, α and β are usually assumed
constant as 0.85 and 0.80 in reinforced concrete (RC) codes. From an
earlier investigation of the authors, α is not a constant but significantly
affected by flexural strain gradient, and increases with the increasing
of strain gradient till a maximum value. It indicates that larger
concrete stress can be developed in flexure than that stipulated by
design codes. As an extension and application of the authors- previous
study, the modified equivalent concrete stress block is used here to
produce a series of design charts showing the maximum design limits
of flexural strength and ductility of singly- and doubly- NSC beams,
through which both strength and ductility design limits are improved
by taking into account strain gradient effect.},
	    journal   = {International Journal of Civil and Environmental Engineering},
	  volume    = {5},
	  number    = {11},
	  year      = {2011},
	  pages     = {575 - 581},
	  ee        = {https://publications.waset.org/pdf/2933},
	  url   	= {https://publications.waset.org/vol/59},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 59, 2011},
	}