Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"strut-and-tie"”.
-
Analysis and Design Tools for Structural Concrete Using Strut -and -Tie Models
… a compound document (contains both a paper copy and a CD as part of the dissertation).
-
Automatic design of concrete structures using a strut & tie approach
… in this thesis is an investigation of the strut and tie method for designing 2-D in-plane, reinforced concrete structures. Two important issues relating to this method are addressed. Firstly, the issue of visualising an appropriate strut and tie model is dealt with. In many situations it …
-
Anchorage Zone Design for Pretensioned Bulb-Tee Bridge Girders in Virginia
… in the United States. The application and diffusion of the prestress force in a pretensioned girder causes a vertical tension force to develop near the end of the beam. Field surveys of the beam ends of pretensioned bridge girders indicate that many of the PCBT beams used in the …
-
Behaviour of continuously supported self-compacting concrete deep beams
… were the shear span-to-depth ratio, the amount and configuration of web reinforcement and the main longitudinal reinforcement ratio. All beams failed due to a major diagonal crack formed between the applied mid-span load and the intermediate support separating the beam into two blocks: the first …
-
Seismic Performance of Column-to-Drilled-Shaft Connections in Reinforced Concrete Bridges
… to allow tolerance in the column placement and to facilitate plastic hinge formation in the column rather than in the shaft. The column-shaft connection, which involves a noncontact splice between the column and shaft bars, is a key component in this structural system. However, there is …
-
The Development of a Steel Embedded Connection for Double-Tee Beams
… as a shooter. The shooter is provided in capacities, a 40 kip capacity shooter and a 50 kip capacity shooter. This steel connection is embedded near the end of a double-tee prestressed girder. Double-tee prestressed girders are a primary component used in the construction of parking garages. …
-
On The Shear Strength Of Partially Grouted Concrete Masonry
… conditions, aspect ratio, initial axial stress and specimen size. The shear capacities of the walls were compared against the predicted shear from four empirical equations. The sensitivity of the initial stiffness and different methods for calculation of ductility are discussed in detail. …
-
Concrete Bridge Girders with Exposed Flexural Reinforcement
… The absence of bond between the concrete and steel at this stage makes it difficult to compute the flexural capacity and the current code criteria provide no guidance to assist practitioners. The research reported in this thesis rectifies this knowledge gap. A thorough examination is …
-
Linear and Nonlinear Finite Element Analyses of Anchorage Zones in Post-Tensioned Concrete Structures
Linear and nonlinear finite element analyses are used for the investigation of rectangular anchorage zones with the presence of a support reaction. The investigation is conducted based on four load configurations consisting of concentric, inclined concentric, eccentric, and inclined eccentric …
-
Nonlinear Truss Analysis of Non-ductile Reinforced Concrete Frames with Unreinforced Masonry Infills
Non-ductile Reinforced Concrete Frames (RCF) with and without Unreinforced Masonry (URM) infills can be found in many places around the world including the Western United States, Eastern Europe, Asia and Latin America. These structures can have an unsatisfactory seismic performance which may even …
-
Shear Strength Assessment of Corrosion-Damaged Prestressed Concrete Girders
… which accelerates the deterioration rate and can result in a complete loss of the concrete cover and exposure of the reinforcing and prestressing steel. This causes degradation in the load-carrying capacity of the bridge girders. Consequently, decisions need to be made on whether to …
-
CFRP as Shear and End-Zone Reinforcement for Concrete Bridge Girders
… was NEFMAC grid, which consists of vertical and horizontal CFRP tows that form an 8 in. by 10 in. grid. The use of NEFMAC grid as transverse reinforcing has not been previously investigated. First, the development length of NEFMAC grid was determined. Next, an 18 ft long 19 in. deep beam, …
-
Design, fabrication, and testing of plain concrete beams using topology optimization
… optimization is a free-form design technique, and often produces complex, nonlinear designs that would be difficult to fabricate on a buildings-scale. However, this tendency suggests that concrete could be an excellent building material for topology-optimized civil structures, since its initial …
-
Development of a Composite Concrete Bridge System for Short-to-Medium-Span Bridges
… performance against reflective cracking, and reduces the likelihood of cracking due to time dependent effects. The effects of transverse bending due to concentrated wheel loads are investigated with respect to reflective cracking. Transverse bending moment are quantified and compared to …
-
Kinematics-Based Modelling of Deep Transfer Girders in Reinforced Concrete Frame Structures
… of the shear mechanisms of deep beams, and a number of formulations and models have been proposed attempting to explain their behaviour. However, up to the present, the accurate prediction of the shear response of deep beams remains a challenge. Considering the importance of such kind of …
-
THE SHEAR BEHAVIOUR OF THE REINFORCED CONCRETE FOUR-PILE CAPS
… a consistent discrepancy between UK design standards BS5400 and BS8110 in the prediction of the shear capacity of 2-way spanning reinforced concrete pile caps from bending theory-based empirical design formulae. This causes designers difficulty to predict an accurate shear capacity of the pile …
-
Behavior of Deep Reinforced Concrete Beams under Monotonic and Reversed Cyclic Load
… non-slender beams under monotonic and reversed cyclic loads, as particular consideration is given to the load-bearing mechanisms which occur in moderately-deep beams. The choice of this topic was motivated in part by verification studies which show that the current code procedures …
-
Rehabilitation of concrete girders with distressed end regions using innovative materials
… severe damage to the structural integrity and durability of the bridges. Among all types of damage, the distressing of end regions in bridge girders is very commonly observed. This damage could be in the form of cracking and spalling of concrete and steel corrosion. This research focuses on …
-
Performance and Design of Anchorage Zones for Post-Tensioned Box Girder Bridges
… forces are applied to the box girder, and then spread into the box section. The spreading of the large compressive forces creates transverse tension forces that must be considered in design. The diaphragm, web, deck and soffit adjacent to prestressing anchors are affected by force …
-
Inelastic web crushing performance limits of high-strength-concrete structural walls
… piers with highly-reinforced boundary elements and the connecting walls. However, current conservative design approaches result in massive cross sections that can lead to increased construction cost. This study investigates the feasibility of defining new limits for a seldomly considered failure …
Page 1 of 2