Deformations at flexural yielding of members with continuous or lap-spliced bars

An Empirical-Based Approach for Modeling and Assessment of Rc Columns With Plain Bars

“…( ) / 0.086 7.6 1 0.23 The observed values of EIeff/EIg can be compared with the ASCE/SEI 41-13 provisions; mean, median and CoV of the observed-to-predicted ratio are 0.82, 0.83 and 0.30, singularly equal to the values observed by Elwood and Eberhard [27] on rectangular columns with deformed bars; hence, the presence of plain bars does not seem to increase the deformability at yielding [11]. However, if a non-biased estimate of the expected stiffness has to be provided, the lower bound could be decreased from 0.30 to 0.20; mean, median and CoV of the observedto-predicted equal to 0.98, 0.94 and 0.31 would be obtained, see Figure 3.…”

Stiffness Modeling of Rc Columns Reinforced With Plain Rebars

“…3a. Further, the suggested empirical formulation by Biskinis and Fardis [22] (Table 1) was observed to underestimate the effective stiffnesses as compared to EC8-3 while satisfying slightly higher mean and standard deviation (Figs. 3c -3d).…”

“…However, for the columns under high axial load ratio, the development of slip induced deflections was not permitted as much as the columns under low axial load and the slip contribution can be expected to be higher for lapspliced columns regarding the lower bond stress levels. The outcomes of the previous research [20][21][22] claimed the influence of poor bond performance of plain rebars on the yield deflection, yield strength and effective stiffness of RC columns to be insignificant considering a database including 20 columns reinforced with plain rebars.…”

Seismic Behaviour of Poorly Detailed Rc Bridge Piers With Hollow Cross-Section

“…The lateral displacement sequence consisted of three push/pull cycles at displacements equal to 1/3Δy, 2/3 Δy, Δy, 2 Δy, 4 Δy, 6 Δy, and so on, unless failure occurred earlier. The displacement at yielding (Δy) was estimated according to [17].…”