Recently added articles from ACI Structural Journal:

Design of Deep Beams Using Strut-and-Tie Models-Part I: Evaluating U.S. Provisions

Jul 01, 2008; Brown, Michael D; Bayrak, Oguzhan ... From published reports, a database of 596 tests of reinforced concrete beams with shear span-depth ratios less than 2 was assembled. That compilation of data was used to examine the strain energy in various truss models that could be used to model the test specimens. It was found that single ...

Design of Deep Beams Using Strut-and-Tie Models-Part II: Design Recommendations

Jul 01, 2008; Brown, Michael D; Bayrak, Oguzhan ... Based on the findings of Part I of this study, the use of current strut-and-tie modeling provisions of both ACI 318-05 and AASHTO LRFD can lead to an unconservative calculation of nominal capacities for some test specimens. New provisions were developed based on the lower bound to a database of ...

Effectiveness of Web Reinforcement around Openings in Continuous Concrete Deep Beams

Jul 01, 2008; Yang, Keun-Hyeok; Ashour, Ashraf F ... Twenty-two reinforced concrete continuous deep beams with openings and two companion solid deep beams were tested to failure. The main variables investigated were the configuration of web reinforcement around openings, location of openings, and shear span-to-overall depth ratio. Web openings ...

Self-Consolidating Concrete Columns under Concentric Compression

Jul 01, 2008; Lin, Chien-Hung; Hwang, Chao-Lung; Lin, Shih-Ping; Liu, Chih-Hsiuan ... Two series of column specimens were tested to investigate the behavior of self-consolidating concrete (SCC) columns under concentric compression. The first series contained 16 columns made with normal concrete (NC), and the second 16 columns were made with SCC. The test variables included the ...

Punching Shear Strength of Reinforced Concrete Slabs without Transverse Reinforcement

Jul 01, 2008; Muttoni, Aurelio ... A mechanical explanation of the phenomenon of punching shear in slabs without transverse reinforcement is presented on the basis of the opening of a critical shear crack. It leads to the formulation of a new failure criterion for punching shear based on the rotation of a slab. This criterion ...

Design and Analysis of Heavily Loaded Reinforced Concrete Link Beams for Burj Dubai

Jul 01, 2008; Lee, Ho Jung; Kuchma, Daniel A; Baker, William; Novak, Lawrence C ... This paper presents a study on the shear capacity and behavior of reinforced concrete link beams designed for the Burj Dubai Tower, which is the tallest building in the world and will be ready for occupancy in 2009. Several thousand reinforced concrete link beams were used in this structure to ...

Behavior of Deep Beams with Short Longitudinal Bar Anchorages

Jul 01, 2008; Roy, Nathan C; Breña, Sergio F ... This paper presents laboratory test results of 12 deep beams in which the longitudinal reinforcement was anchored into the support using short straight bar anchorages. Specimens were constructed using three different shear span-depth ratios (a/d). Differences in general and local behavior in the ...

Reinforced Concrete Jacketing-Interface Influence on Cyclic Loading Response

Jul 01, 2008; Júlio, Eduardo N B S; Branco, Fernando A B ... Following previous studies, the authors describe an experimental study performed to analyze the influence of the interface treatment on the seismic behavior of columns strengthened by reinforced concrete (RC) jacketing to increase their ultimate bending moment. A numerical study, subsequently ...

Experimental Study of Offset Mechanical Lap Splice Behavior

Jul 01, 2008; Coogler, Keith L; Harries, Kent A; Gallick, Marcella ... The behavior of offset mechanical splices is investigated in the context of currently-prescribed acceptance test methods and criteria. Two commercially available offset mechanical splice systems were tested in direct tension with the splice both restrained and unrestrained from rotating. In this ...

Shear Strength of Squat Rectangular Reinforced Concrete Walls

Jul 01, 2008; Gulec, Cevdet K; Whittaker, Andrew S; Stojadinovic, Bozidar ... Squat reinforced concrete walls (height less than twice the length) are important structural components of both conventional and nuclear safety-related structures. Predictive equations are available in the literature to compute the shear strength of squat walls but the scatter in the results for ...

Shrinkage Restraint and Loading History Effects on Deflections of Flexural Members

Jul 01, 2008; Scanlon, Andrew; Bischoff, Peter H ... The effects of shrinkage restraint cracking and loading history on deflection of reinforced concrete flexural members are discussed. It is shown that deflections of lightly reinforced members (less than 0.8% reinforcement) are highly sensitive to both shrinkage restraint cracking and loading ...

Thermal Movements in Parking Structures. Paper by Mohammad Iqbal/AUTHOR'S CLOSURE

Jul 01, 2008; Klein, Gary; Lindenberg, Richard ... Discussion by Gary Klein and Richard Lindenberg ACI member, Wiss, Janney, Elstner Associates, Inc., Northbrook, IL; Davis Bowan & Friedel, Salisbury, MD This paper discusses a very important but frequently misunderstood aspect of parking structure design. The paper provides ...

Test of High-Rise Core Wall: Effective Stiffness for Seismic Analysis. Paper by Perry Adebar, Ahmed M. M. Ibrahim, and Michael Bryson

Jul 01, 2008; Solanki, Himat ... (ProQuest: ... denotes formulae omitted.) The authors have presented an interesting concept on the effective stiffness of core/structural walls. The discusser would like to offer the following comments: 1. The authors have proposed Eq. (3) based on a limited test series of walls ...

Test of High-Rise Core Wall: Effective Stiffness for Seismic Analysis. Paper by Perry Adebar, Ahmed M. M. Ibrahim, and Michael Bryson/AUTHOR'S CLOSURE

Jul 01, 2008; LaFave, James M; Lehman, Dawn E ... Discussion by James M. LaFave and Dawn E. Lehman ACI member, Associate Professor, Department of Civil and Environmental Engineering, University of Illinois, Urbana, IL; Assistant Professor, Department of Civil and Environmental Engineering, University of Washington, Seattle, ...

Investigation of Deep Beams with Various Load Configurations. Paper by Michael D. Brown and Oguzhan Bayrak/AUTHORS' CLOSURE

Jul 01, 2008; Sahoo, Dipak Kumar; Singh, Bhupinder; Bhargava, Pradeep ... Discussion by Dipak Kumar Sahoo, Bhupinder Singh, and Pradeep Bhargava Research Scholar, Indian Institute of Technology, Roorkee, India; Assistant Professor, Indian Institute of Technology; and Professor, Indian Institute of Technology The authors are to be complimented for their ...

Effect of Shrinkage on Short-Term Deflections of Reinforced Concrete Beams and Slabs. Paper by Peter H. Bischoff and Ryan D. Johnson/AUTHORS' CLOSURE

Jul 01, 2008; Kaklauskas, Gintaris; Gribniak, Viktor; Bacinskas, Darius ... Discussion by Gintaris Kaklauskas, Viktor Gribniak, and Darius Bacinskas Professor, Head of Department, Vilnius Gediminas Technical University (VGTU), Vilnius, Lithuania; Researcher, VGTU; and Associate Professor, VGTU The authors are to be congratulated for raising an important, ...

Justification of ACI 446 Proposal for Updating ACI Code Provisions for Shear Design of Reinforced Concrete Beams. Paper by Zdenek P. Bazant, Qiang Yu, Walter Gerstle, James Hanson, and J. Woody Ju/AUTHORS' CLOSURE

Jul 01, 2008; Bentz, Evan C ... Discussion by Evan C. Bentz ACI member, Associate Professor, University of Toronto, Toronto, ON, Canada The authors are to be congratulated for writing a comprehensive paper that summarizes the opinions of ACI Committee 446 on fracture mechanics approaches to shear design. First, ...

Experimental Study on Progressive Collapse-Resistant Behavior of Reinforced Concrete Frame Structures

Jul 01, 2008; Yi, Wei-Jian; He, Qing-Feng; Xiao, Yan; Kunnath, Sashi K ... A static experimental study to investigate progressive failure of a reinforced concrete frame due to the loss of a lower story column is described. A four-bay and three-story one-third scale model representing a segment of a larger planar frame structure was tested. A constant vertical load was ...