… In this paper, simplified models for normalstrength and high-strength concrete have been
proposed to estimate the effective stiffness of RC frame members. The models represent the …

… with central opening, F fill is the lateral strength of the solid infilled frame and F bare is the
lateral strength of the reinforced concrete frame. The best fit is obtained for a value of n equal …

… stiffness demand for the PS wall in moment frames. Also, the stiffness demand is described
by a new stiffness … frame. Extensive nonlinear dynamic analysis on six prototype reinforced-…

… behavior of high reinforced concrete (HSRC) frame under lateral load … frame increased
the stiffness of frame by a significant value. The initial stiffness of frame F3 is greater than frame …

… yield strength was either 300 MPa or 400 MPa, and a concrete … stiffness of frames is likely
to be much lower than typically assumed by designers. A consequence is that most frame …

… Test results revealed that partially infilled nonductile RC frames exhibited significantly higher
ultimate strength and higher initial stiffness than the bare frame (frame with no infill). As the …

… since the stiffness of the sample decreases abruptly upon concrete cracking. Tension
stiffening refers to the concrete tensile strength between cracks that influence member stiffness, …

… 318 on the stiffness of columns and second-order effects in non-sway frames subject to gravity
… Higher-strength concrete allows for a more pronounced increase in demand, Pu, than in …

… Reinforced concrete members, when subjected to cyclic inelastic deformations, exhibit
both stiffness and strength degradation. Development and testing of mechanical models with …

… If values for the diagonal stiffness and strength of the infill … the lateral stiffness and strength
of the infilled frame by assuming all … strength of the concrete, the lower the tensile strength as a …