Author: Tricia Caldwell
Publisher:
ISBN:
Category :
Languages : en
Pages :
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ABSTRACT: Given the prospective threat of a blast or impact load causing severe damage to a structural element or system, it is critical to investigate and understand the dynamic behavior and potential failure modes of such members. One method used to perform such an analysis in a computationally efficient manner is the programming code Dynamic Structural Analysis Suite (DSAS). The presented study's intent is to evaluate the incurrence of plastic hinges via DSAS and inspect the resultant behavior of both normal strength reinforced concrete and ultra high performance concrete columns under severe loads. Ultra high performance concrete (UHPC) is an emerging engineering technology characterized by increased strength and durability compared with normal and high performance concretes. As a relatively new material, UHPC remains to be fully characterized, and to study the material's response under simulated loading conditions contributes to widening its use, especially with respect to protective applications. As a particularly vulnerable structural element under blast and impact loadings, columns are the specific interest of the study. To introduce the dynamic behavior of concrete columns, the analytical methods and models detailed in engineering literature 18 are first reviewed. The study then examines the process by which DSAS was adjusted to approximate the plastic hinge formation and respective curvature along the column length, allowing for the evaluation of concrete columns' behavioral response under various boundary and load conditions. The considered normal strength concrete and UHPC columns are subsequently compared with the output from the finite element program ABAQUS for corresponding material models as well as the simulated behavior of each other using DSAS. Such comparisons respectively intend to validate the generated models and to demonstrate the elevated properties of UHPC. Given the pr.
Author: William J. Nordell
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
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Fifteen static and dynamic tests were conducted to measure the actual magnitude of the curvature of a plastic hinge and to correlate the angle of deformation with resistance for beams subjected to dynamic loads. The primary variables were the amount of compression reinforcement, the distance between the concentrated loads, and the rate of loading. The dynamic step loads ranged in magnitude from about 1.10 to 1.25 times the static yield load. The computed values of moment, curvature, and deflection at the onset of plastic hinging were less than the experimental values for both static and dynamic loadings. The 30% increase in beam resistance under dynamic loads agreed with the increase in yield strength of the coupon specimens subjected to rapid straining. Plastic hinging was similar in the static and dynamic beams loaded at mid-span. Crushing occurred at approximately the same deflection under both types of load. For the beams with a pure moment region, a dynamic load equal to approximately 1.1 times the static load caused crushing at mid-span before the plastic hinge had developed as completely as it did for static loading; thus, for dynamic loads, the deflections were lower at the onset of crushing than they were for static loads. (Author).
Author: Eric B. Williamson
Publisher: Transportation Research Board
ISBN: 0309118190
Category : Technology & Engineering
Languages : en
Pages : 152
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Explores code-ready language containing general design guidance and a simplified design procedure for blast-resistant reinforced concrete bridge columns. The report also examines the results of experimental blast tests and analytical research on reinforced concrete bridge columns designed to investigate the effectiveness of a variety of different design techniques.
Author: Robert E. Englekirk
Publisher: John Wiley & Sons
ISBN: 9780471081227
Category : Technology & Engineering
Languages : en
Pages : 856
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Book Description
* Presents the basics of seismic-resistant design of concrete structures. * Provides a major focus on the seismic design of precast bracing systems.
Author: Kim Tania Douglas
Publisher:
ISBN:
Category : Concrete construction
Languages : en
Pages : 299
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Author:
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 654
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Author: Yael D. Hose
Publisher:
ISBN:
Category :
Languages : en
Pages : 988
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Author: Thomas Paulay
Publisher: Wiley-Interscience
ISBN: 9780471549154
Category : Technology & Engineering
Languages : en
Pages : 768
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Book Description
Emphasizes actual structural design, not analysis, of multistory buildings for seismic resistance. Strong emphasis is placed on specific detailing requirements for construction. Fundamental design principles are presented to create buildings that respond to a wide range of potential seismic forces, which are illustrated by numerous detailed examples. The discussion includes the design of reinforced concrete ductile frames, structural walls, dual systems, reinforced masonry structures, buildings with restricted ductility and foundation walls. In addition to the examples, full design calculations are given for three prototype structures.
Author: Geodex International
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 184
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Author:
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 810
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