ACI 445B Shear Wall Database
Category
Uncategorized
Published on
Aug 21, 2019
Abstract
This structural wall performance database is being compiled and vetted several times per year by ACI Subcommittee 445B. It contains material and geometric properties, experimental results, and references for tests of reinforced concrete structural walls. Data from 521 wall tests are available in this database as of April 24, 2017. More data will be added in the future. Loaddeflection data files obtained from SERIES Wall Database (http://www.dap.series.upatras.gr/default.aspx ) are available for some experiments. Part of the database was assembled using data provided by researchers from Tongji University. Parameter definitions are as follows and are also available under supporting documentation: 

Parameters 
Definitions 
General Information 
Contributor: 
Person who made entry (including email) 
Checked/Feedback by: 
Person who checked/corrected entry (including email) (list of names and emails separated by semicolons) 

Author: 
Author(s) of report or paper separated by semicolons 

Vetting Status: 
Vetted or not vetted by committee Levels of vetting: Level 0: No checking has taken place. Level 1: Information entered once and checked by a second person. Level 2: Information entered twice by two independent persons. 

Reference: 
Citation to report, journal, or conference paper (in EndNote format) 

Source: 
Link to report, paper, or abstract (if source is copyrighted) 

Specimen Label: 
Label of specimen used in original report or paper 

Units: 
US: U.S. customary [in, kip, ksi] SI: S.I. [mm, N, MPa] 

Geometric Properties 
Wall Height: 
Height of the wall (including loading beam) 
Wall Length: 
Total length of wall in the direction of the applied load 

Aspect Ratio: 
Ratio of wall height to wall length 

Wall Width: 
Dimension (in the direction perpendicular to the load) of the rectangle encompassing the cross section at the base of the wall 

Ag: 
Area of gross crosssection 

Number of Stories: 
Number of slabs or beams framing into the wall along its height 

Web Thickness: 
Minimum thickness of wall web(s) 

Flange Thickness: 
Minimum thickness of wall flange(s) 

Shape of Section: 
R (rectangular) I (barbell) Other shapes –resembling letters  (direction of loading parallel to vertical segments of designating letter) H C L T O U n Z N G (general shape) Basic dimensions (for R and I Sections only) S1 (depth of boundary element, flange, or full section) S2 (width of boundary element, flange, or full section) S3 (depth of web) S4 (thickness of web) Crosssectional dimensions (all sections other than R, I, G sections) or coordinates of vertices (G sections): S1;S2;S3; etc. (Figure 1 – dimensions numbered starting at outermost fiber subjected to compression during first loading) or, for G sections (geometry is specified using coordinates of vertices): X1,Y1;X2,Y2;X3,Y3;…X1,Y1 

Material Properties 
Age of Concrete: 
Age of concrete at testing (in days after cast) 
Type of Concrete: 
N: Normal weight L: Lightweight FS1: Fiber (S: steel, # for % in volume) 

Concrete Compressive Strength: 
Compressive strength at age of test (from the pedestal to roof); specified compressive strength; compressive strength at 28 days (from the pedestal to roof) (Entries separated by semicolons) fc1’,fc2’…; fc(specified);fc1(28),fc2(28),fc3(28)… 

Type of Coupon: 
A: 100 mm cube B: 150 mm cube C: 6 in x 12 in cylinder D: 4 in x 8 in cylinder E: Cube of unknown size F: Cylinder of unknown size G: 150 mm x 300 mm cylinder 

Type of Reinforcement Layout: 
0 1 

Reinforcement Depths/Coordinates and Areas (of Vertical Bars): 
List of depths and areas measured and numbered from the outermost fiber in compression during first loading Format 0: D1,A1;D2,A2;D3,A3; etc. Format 1: X1,Y1,A1;X2,Y2,A2; etc. 

Yield Stresses of Vertical Bars: 
Yield stresses of vertical bars at locations 1, 2, 3, etc. (defined in field for depths/coordinates) fy1;fy2;fy3; etc. 

Ultimate Stresses of Vertical Bars: 
Ultimate stresses of vertical bars at locations 1, 2, 3, etc. (defined in field for depths/coordinates) fu1;fu2;fu3; etc. 

Fracture Strains of Vertical Bars: 
Fracture strains of vertical bars at locations 1, 2, 3, etc. (defined in field for depths/coordinates) (measured over 200 mm gage length) eu1;eu2;eu3; etc. 

Yield Stress of Horizontal Reinforcement 
Yield stress of horizontal reinforcement 

Ultimate Stress of Horizontal Reinforcement: 
Ultimate stress of horizontal reinforcement 

Fracture Strain of Horizontal Reinforcement: 
Fracture strain of horizontal reinforcement [measured over 200 mm or 8 in gage length] 

Yield Stress of Confinement Reinforcement: 
Yield stress of confinement reinforcement 

Ultimate Stress of Confinement Reinforcement: 
Ultimate stress of confinement reinforcement 

Fracture Strain of Confinement Reinforcement: 
Fracture strain of confinement reinforcement [measured over 200 mm or 8 in gage length] 

Clear Cover in Flanges: 
Clear cover to reinforcement in flanges 

Clear Cover in Webs: 
Clear cover to reinforcement in webs 

Clear Cover in Confined Region: 
Clear cover to reinforcement in boundary elements 

Maximum (s/d_{b}): 
Maximum ratio of spacing of transverse reinforcement (s) to bar diameter (d_{b}) for bars closest to outermost fiber in compression 

Lap Splice Lengths: 
Length of lap splices (list lengths normalized with respect to bar diameter, separate entries by semicolons) L1, L2, L3… 

Reinforcement Ratios [at wall base] –can be generated automatically 

Vertical Reinforcement 

Flange: 
Ratio of total area of vertical reinforcement in flanges to sum of gross crosssectional areas of flanges 

Web: 
Ratio of total area of vertical reinforcement in web(s) to sum of gross crosssectional areas of web(s) 

Boundary Region: 
Ratio of total area of vertical reinforcement in confined region(s) to sum of gross crosssectional areas of confined region(s) 

Horizontal Reinforcement 

Flange: 
Mean ratio of area of horizontal reinforcement in flanges to area of concrete 

Web: 
Mean ratio of area of horizontal reinforcement in web(s) to area of concrete 

Boundary Region: 
Mean ratio of area of horizontal reinforcement in confined regions to area of concrete rho1;rho2;rho3;rho4 (Only for T Section) (Figure 2: Sequence of Confined Region Reinforcement Ratios in T section) 

Height of Confined Region(s): 
Height of confined region(s) 

Experimental Program  Type of Loading: 
0: Pure shear 1: Single lateral load 2: Multiple lateral loads 
Directionality: 
U: Uniaxial B: Biaxial 

Loading Protocol: 
M: Monotonic C: Cyclic 

Loading Points: 
Number of levels at which lateral loads were applied 

Height to Loading Points: 
List of heights to loading points (separated by semicolons) 

P: 
Applied axial load 

PDelta Case: 
Case I Case II Case III Case IV (Defined in Figure 3) 

PDelta Correction: 
0: Not included in reported lateral loads 1: Included in reported lateral loads 

M: 
Moment applied at top wall [kN*m] 

Experimental Results 
Shear Damage: 
Did the researcher attribute the cause of failure to shear? Y/N 
OutofPlane Buckling: 
Did the researcher attribute the cause of failure to outofplane buckling? Y/N 

Drift at Spalling: 
Reported drift at first sign of spalling 

Drift at Bar Buckling: 
Drifts at top loading point at buckling of bars at depths DB1;DB2;DB3, etc. 

Drift at Bar Fracture: 
Drifts at top loading point at fracture of bars at depths DB1;DB2;DB3, etc. 

Drift at Web Crushing: 
Reported drift at first indication of web crushing 

Maximum Base Shear V_{max}: 
Maximum total lateral force reported by researcher (Figure 4) 

Drift at Maximum Base Shear: 
Displacement measured at top loading point at V_{max} (Figure 4) 

Drift at Yield: 
Top drift measured at intersection of secant to loaddeflection curve at 0.75*V_{max} and horizontal line at V_{max}. Not reported for walls with failures attributed to shear (Figure 4) 

LoadDeflection Curves: 
Files containing loaddeflection data (two entries for biaxial tests) 

Drift Capacity: 
Displacement at intersection of horizontal line at 0.8*V_{max} and envelope of loaddeflection curve (Figure 4) 

Initial Stiffness: 
Slope of secant to loaddeflection curve at V_{max}/4 [kN/m] (Figure 4) 

Comments: 
Critical comments about the test procedure or test results 
Figure 1: Crosssectional Dimensions
Figure 2: Sequence of Confined Region Reinforcement Ratios in T section (Horizontal Reinforcement)
Figure 3: PDelta Cases (http://nisee.berkeley.edu/spd/performance_database_manual_10.pdf)
Figure 4: Definitions of Measured Drifts
Cite this work
 Santiago Pujol, ACI Subcommittee 445B, Cheng Song, Ying Wang, Aishwarya Puranam, Merve Usta (2019), "ACI 445B Shear Wall Database," https://datacenterhub.org/deedsdv/publications/view/318.