DOI: 10.7277/qyca-en33
title: High Strength Steel Bars in RC Columns

description: &lt;p&gt;        In Japan, many tests have been conducted to investigate high-strength steel reinforced concrete members. This is due to the country&#39;s dense population and location in a region of high seismicity. Most publications about these tests were written only in Japanese. With increasing interest in the implementation of high-strength steel reinforcement in the United States, there is an urgent need to translate key parameters and findings from these tests to English. This is the purpose of this dataset: to translate key information about specimens, their performance, and the authors&#39; observations from Japanese to English.&lt;/p&gt; &lt;p&gt;        &lt;span style="font-style: normal"&gt;The data presented herein were gathered exclusively from papers published in Japanese. The units were converted from metric to U.S. customary. In order to facilitate comparison with other data, parameters used to organized the data were taken from the ACI 369 Rectangular Column Database. These parameters are described below.&lt;/span&gt;&lt;/p&gt; &lt;p&gt;&lt;strong&gt;&lt;em&gt;Parameters of High Strength Steel Bars in RC Columns&lt;/em&gt;&lt;/strong&gt;&lt;/p&gt; &lt;p&gt;&lt;img alt="" src="https://datacenterhub.org/resources/278/download/col_elevation.PNG" /&gt;&lt;/p&gt; &lt;p&gt;&lt;img alt="" src="https://datacenterhub.org/resources/278/download/col_plan.PNG" style="height: 186px; width: 230px" /&gt;&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Author(s):&lt;/strong&gt; Name of the author(s)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;First Author: &lt;/strong&gt;Name of the first author&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Reference:&lt;/strong&gt; for reference use&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Col. Name:&lt;/strong&gt; Name of column as per reference&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Section depth (h) [in.]:&lt;/strong&gt; Dimension in direction of primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Section width (b) [in.]:&lt;/strong&gt; Dimension in direction perpendicular to primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;d1 [in.]: &lt;/strong&gt;Effective depth in primary direction (dimension from compression face to centroid of outermost layer of tension steel)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;d2 [in.]: &lt;/strong&gt;Effective depth in secondary direction (dimension from compression face to centroid of outermost layer of tension steel)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Clear cover cc [in.]:&lt;/strong&gt; Clear cover to out of transverse reinf.&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;lc [in]:&lt;/strong&gt; Clear length of column&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;a [in.]:&lt;/strong&gt; Shear span&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;a/d1: &lt;/strong&gt;Shear span to depth ratio&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Longi. bars along first face (perp.):&lt;/strong&gt; Longitudinal bars along first face perpendicular to primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Bar dia. [in.]: &lt;/strong&gt;Bar diameter of bars along faces perpendicular to primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Longi. bars in middle layers(perp.): &lt;/strong&gt;Number of middle layers perpendicular to primary load (usually 0 or 2 unless double layers are used per face )&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Longi. bars in middle layers(parl..): &lt;/strong&gt;Number of middle layers parallel to primary load (Not including bars along faces perpendicular to primary load)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Bar dia. mid [in.]: &lt;/strong&gt;Bar diameter of bars in middle layer&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;fy (longi. reinf.) [ksi]: &lt;/strong&gt;Yield stress of longitudinal bars&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;fsu [ksi]: &lt;/strong&gt;Tensile strength of longitudinal bars&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;fyo (longi. reinf.) [ksi]: &lt;/strong&gt;Yield stress of longitudinal bars other than fy (usually blank, but mixed bar grades were used in some tests)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;pL (longi. reinf.) [%]: &lt;/strong&gt;Longitudinal reinforcement ratio=Area of longitudinal reinforcement/(b*h)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Trans. reinf. legs perp. to load: &lt;/strong&gt;Transverse reinforcement legs perpendicular to primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Trans. reinf. legs parl. to load:&lt;/strong&gt; Transverse reinforcement legs parallel to primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Trans. bar dia. [in.]: &lt;/strong&gt;Bar diameter of transverse reinforcement&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Spacing of trans. reinf. (s) [in.]: &lt;/strong&gt;Distance between each transverse hoop (center to center)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;fy (trans. reinf.) [ksi]: &lt;/strong&gt;Yield stress of transverse reinforcement&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;pt (trans. reinf. volumetric ratio) [%]:&lt;/strong&gt;Transverse reinforcement volumetric ratio = (volume of transverse reinforcement spaced at s) / (area of core to out of ties * s)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;pv (trans. reinf. ratio) [%]:&lt;/strong&gt;Transverse reinforcement ratio = (area of transverse reinforcement in direction of primary load spaced at s) / (b * s)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;s/d1 (primary):&lt;/strong&gt; = Spacing of trans. reinf. / Effective depth 1&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;s/d2 (secondary): &lt;/strong&gt;= Spacing of trans. reinf. / Effective depth 2&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Seismic hoops: &lt;/strong&gt;= 0 if unknown, 1 if transverse reinforcements are conforming to ACI 318-08 seismic hoop specifications, 2 otherwise (note that only hoop shape is considered, spacing is not considered in the evaluation)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;f&rsquo;c [ksi]: &lt;/strong&gt;Reported concrete compressive strength at 28 days (f&#39;c)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Axial load(P) [kips]: &lt;/strong&gt;Positive in compression&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Axial load ratio (ALR): &lt;/strong&gt;=P / (f&rsquo;c*b*h)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Variable axial load: &lt;/strong&gt;=1 if variable axial load was applied, 0 if constant axial load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;ALR range: &lt;/strong&gt;Variable axial load ratio range where Nu and Nt are compressive and tensile strength of columns, respectively&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Spliced longi. bars: &lt;/strong&gt;= 0 if bars are not spliced, 1 if longitudinal bars are spliced&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Splice length [in.]: &lt;/strong&gt;Length of splice, if present&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Splice height [in.]: &lt;/strong&gt;height of start of splice measured from bottom of column&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Test configuration: &lt;/strong&gt;See Siva. Thesis table 3.1 for more info(available on ACI 369 resource page under tag &quot;Docs and Attachments&quot;)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Number of loading directions: &lt;/strong&gt;= 1 if uni-directional lateral loading is applied, 2 if bi-directional loading is applied&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Maximum lateral load (primary) (Vmax1) [kips]: &lt;/strong&gt;Maximum lateral load to primary direction&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at Vmax1 [%]: &lt;/strong&gt;Drift ratio at Vmax1 = abs(lateral drift / lc *100)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at 0.8Vmax1 [%]: &lt;/strong&gt;Drift ratio when lateral load capacity drops to 0.8Vmax1 = abs(lateral drift / lc *100); if such a point is not reached during testing a zero value is placed&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at 0.25Vmax1 [%]: &lt;/strong&gt;Drift ratio when lateral load capacity drops to 0.25Vmax1 = abs(lateral drift / lc *100); if such a point is not reached during testing a zero value is placed&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at axial failure (primary) [%]: &lt;/strong&gt;Drift ratio at axial failure in direction of primary load; if such a point is not reached during testing a zero value is placed&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Lateral load at axial failure (primary) [kips]: &lt;/strong&gt;Lateral load at axial failure in direction of primary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Vp1 (primary) [kips]: &lt;/strong&gt;Plastic shear capacity Vp in primary load direction, see Siva. Thesis page 23 for more info (available on the ACI 361 resources page under tag &quot;Docs and Attachments)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Vo1 (pimary) [kips]: &lt;/strong&gt;Vo1=ACI 369R-11 shear capcity in primary load direction with k=1 (low deformations), with Vs fully effective for s/d&lt;0.75, Vs=0 for s/d&gt;1.0 and interpolated in between&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Vp1/Vo1:&lt;/strong&gt; Plastic shear capacity Vp in primary load direction , see Siva. Thesis page 23 for more info (available on the ACI 369 resource  page under tag &quot;Docs and Attachments&quot;)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Maximum lateral load (secondary) (Vmax2) [kips]: &lt;/strong&gt;Maximum lateral load to secondary direction&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at Vmax2 [%]: &lt;/strong&gt;Drift ratio at Vmax2 = abs(lateral drift / lc *100)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at 0.8Vmax2 [%]: &lt;/strong&gt;Drift ratio when lateral load capacity drops to 0.8Vmax2 = abs(lateral drift / lc *100); if such a point is not reached during testing a zero value is placed&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at 0.25Vmax2 [%]: &lt;/strong&gt;Drift ratio when lateral load capacity drops to 0.25Vmax2 = abs(lateral drift / lc *100); if such a point is not reached during testing a zero value is placed&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Drift ratio at axial failure (secondary) [%]: &lt;/strong&gt;Drift ratio at axial failure in direction of secondary load; if such a point is not reached during testing a zero value is placed&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Lateral load at axial failure (secondary) [kips]: &lt;/strong&gt;Lateral load at axial failure in direction of secondary load&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Vp2 (secondary) [kips]: &lt;/strong&gt;Plastic shear capacity Vp in secondary load direction, see Siva. Thesis page 23 for more info (available on the resources page under tag &quot;Docs and Attachments)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Vo2 (pimary) [kips]: &lt;/strong&gt;Vo2=ACI 369R-11 shear capcity in secondary load direction with k=1 (low deformations), with Vs fully effective for s/d&lt;0.75, Vs=0 for s/d&gt;1.0 and interpolated in between&lt;/p&gt; &lt;p align="left"&gt;&lt;b&gt;s/db: &lt;/b&gt;Transverse reinforcement spacing (normalized to longitudinal bar diameter)&lt;/p&gt; &lt;p align="left"&gt;&lt;strong&gt;Failure mode:&lt;/strong&gt; Reported failure mode&lt;/p&gt; &lt;p align="left"&gt; &lt;/p&gt; &lt;nb:citations&gt;&lt;/nb:citations&gt;