000			02114aab a2200241 4500
008			240611b20052005|||br||| |||| 00| 0 eng d
022			_a1598-8198
100			_aF. T. K. Au _9882219
100			_aB. Z. Z. Bai _9882414
100			_aA. K. H. Kwan _9882220
245			_aComplete moment-curvature relationship of reinforced normal- and high-strength concrete beams experiencing complex load history
300			_a309-324 p.
520			_aThe moment-curvature relationship of reinforced concrete beams made of normal- and high-strength concrete experiencing complex load history is studied using a numerical method that employs the actual stress-strain curves of the constitutive materials and takes into account the stress-path dependence of the concrete and steel reinforcement. The load history considered includes loading, unloading and reloading. From the results obtained, it is found that the complete moment-curvature relationship, which is also path-dependent, is similar to the material stress-strain relationship with stress-path dependence. However, the unloading part of the moment-curvature relationship of the beam section is elastic but not perfectly linear, although the unloading of both concrete and steel is assumed to be linearly elastic. It is also observed that when unloading happens, the variation of neutral axis depth has different trends for under- and over-reinforced sections. Moreover, even when the section is fully unloaded, there are still residual curvature and stress in the section in some circumstances. Various issues related to the post-peak behavior of reinforced concrete beams are also discussed.
650			_aHigh-Strength Concrete
650			_aMoment-Curvature Relationship _9679392
650			_aNormal-Strength Concrete _9169999
650			_aReinforced Concrete Beams _962946
650			_aStress-Path Dependence _9882415
650			_aUnloading and Reloading _9882416
773	0		_tComputers and Concrete: An International Journal _x15988198 _dDaejeon, Korea : Techno Press
856			_uDOI: 10.12989/cac.2005.2.4.309
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c815275 _d815275