Recently added articles from ACI Structural Journal:
Strut-and-Tie Models for Headed Bar Development in C-C-T Nodes
Mar 01, 2009; ... This study presents strut-and-tie models (STMs) explaining the development of bond strength along bonded length together with anchorage by head bearing of a headed bar. The anchorage at a head requires construction of a biaxially compressed nodal zone and bond resistance needs to use the concept ...
Experimental Investigation of Infilled Reinforced Concrete Frames with Openings
Mar 01, 2009; ... The influence of masonry openings on the seismic performance of infilled reinforced concrete frames, designed according to current code provisions, is investigated. Eight 1/3-scale, single-story, single-bay frame specimens were tested under reversed cyclic, quasistatic, horizontal loading up to ...
Adaptable Strut-and-Tie Model for Design and Verification of Four-Pile Caps
Mar 01, 2009; ... A large percentage of pile caps support only one column, and the pile caps in turn are supported by only a few piles. These are typically short and deep members with overall span-depth ratios of less than 1.5. Codes of practice do not provide uniform treatment for the design of these types of ...
Two-Way Shear Strength of Slab-Column Connections: Reexamination of ACI 318 Provisions
Mar 01, 2009; ... In typical lightly-reinforced slab-column connections, extensive flexural yielding is likely to occur before the computed punching shear capacity is reached. The basic ACI 318 two-way shear strength provision has not changed since 1963 and was developed based on a statistical analysis of test ...
Low-Cycle Fatigue Damage of Circular Concrete-Filled-Tube Columns
Mar 01, 2009; ... Under seismic actions, the induced damage in critical regions of a concrete-filled steel tube (CFT) column could be attributed to cumulative damage of the steel tube caused by repeated cyclic loading in the post-yield strain range. An experimental study was undertaken to develop an analytical ...
Structural Assessment of Bridges with Premature Concrete Deterioration due to Expansive Reactions
Mar 01, 2009; ... From 1998 to 2003, a comprehensive investigation was conducted on the structural performance of in-service bridges with premature concrete deterioration in Texas. The investigation comprised five principal tasks: 1) field studies; 2) development of a simple damage index (DI); 3) laboratory tests ...
Behavior of High-Performance Steel as Shear Reinforcement for Concrete Beams
Mar 01, 2009; ... This paper describes the behavior of high-performance (HP) steel as shear reinforcement for concrete beams. HP steel is characterized by enhanced corrosion resistance and higher strength in comparison to ASTM A615-06 Grade 60 steel. The HP steel selected for this research is commercially known ...
Deformation Capacity of Reinforced Concrete Columns
Mar 01, 2009; ... An effective approach is presented for estimation of the ultimate deformation and load capacity of reinforced concrete columns based on principles of axial-shear-flexure interaction. Conventional section analysis techniques are employed for modeling the flexure mechanism, and the simplified ...
Control of Flexural Cracking in Reinforced Concrete. Paper by R. Ian Gilbert
Mar 01, 2009; ... The author argues against "overly simplistic methods" and promises a rational one for flexural cracking control, especially emphasizing the impact of shrinkage. The discusser agrees but does not find a more exact formulation in the paper. In the introduction, early cracking caused by the ...
Shear Strength of Thin-Webbed Post-Tensioned Beams. Paper by Miguel Fernández Ruiz and Aurelio Muttoni/AUTHORS' CLOSURE
Mar 01, 2009; ... The authors report on tests on thin-webbed, post-tensioned beams failing by crushing of the web and analyze their load-carrying mechanism using different stress fields of increasing complexity. ANALYSIS USING STRAIGHT STRESS FIELDS The derivation of the compressive field angle ...
Investigation of Dispersion of Compression in Bottle-Shaped Struts
Mar 01, 2009; ... Struts are used in strut-and-tie models to represent the flow of compression within a concrete member. A bottle-shaped strut can form when load is applied to a relatively small area, and the resulting stresses disperse as they flow through the strut. The directional changes of the dispersing ...
Evaluation of Bundled Bar Lap Splices
Mar 01, 2009; ... Very limited data are available regarding splices and anchorage of bundled bars. ACI 318-05 prohibits splicing entire bundles, and uses multipliers to increase the required development and splice length for bundled bars to substitute for the lack of bond resistance from the core between bundled ...
Shear Reinforcement Spacing in Wide Members
Mar 01, 2009; ... Large, wide beams and thick slabs are frequently used as transfer elements where the total structural depth must be kept to a minimum. While these members provide large cross-sectional areas of concrete to resist shear demands, shear reinforcement may still be required. For these wide members, ...
Shear Strength of RC Jacketed Interior Beam-Column Joints without Horizontal Shear Reinforcement
Mar 01, 2009; ... The interior joint shear strength of nonductile frames strengthened with reinforced concrete (RC) jackets, but with no new joint shear hoops and no dowel anchors installed into the new and old concrete interface, was investigated experimentally. Seven one-way interior beam-column joint ...
Plastic Hinge Length of Reinforced Concrete Columns. Paper by Sungjin Bae and Oguzhan Bayrak
Mar 01, 2009; ... (ProQuest: ... denotes formulae omitted.) Plastic hinges form at the maximum moment region of reinforced concrete columns. The determination of the length of plastic hinge length is a critical step in predicting the lateral load-drift response of columns. As it is difficult to estimate ...
Plastic Hinge Length of Reinforced Concrete Columns. Paper by Sungjin Bae and Oguzhan Bayrak/AUTHORS' CLOSURE
Mar 01, 2009; ... Predicting the length of a potential plastic hinge in a reinforced concrete element subjected to cyclic loading is required to evaluate the element performance. So, the research discussed an important issue in evaluating seismic performance, and many other researchers studied this issue, as ...