Model Investigation of Column Effects in Flat Slabs PDF Download

Author: Robert A. Gardner
Publisher:
ISBN:
Category : Concrete slabs
Languages : en
Pages : 130

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Author: E. Bakaa Faltaous
Publisher:
ISBN:
Category : Concrete slabs
Languages : en
Pages : 626

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Author: Mohd Rizwan Bhina
Publisher: GRIN Verlag
ISBN: 3656487863
Category : Technology & Engineering
Languages : en
Pages : 50

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Doctoral Thesis / Dissertation from the year 2013 in the subject Engineering - Civil Engineering, grade: B, , course: Master of technology - Structural Dynamics, language: English, abstract: Flat-Slab building is very popular from the aesthetic and architectural point of view. From functional aspect a flat-slab building is more efficient than a R.C. frame building. So, construction of Flat-Slab building is increasing also in high seismic zone. Sometimes international building codes remain silent about the seismic response of flat slab buildings. In this paper the response of Flat-Slab building and a normal symmetric R.C. frame building of same dimension have been studied for varying seismic intensities. Static, Response Spectrum, Pushover, and Time history analysis have been performed to assess the performance of the two buildings. The costs of construction for these two buildings have also been compared. An extensive study on lumped plasticity model as per FEMA 356 with varying position of plastic hinge and its effect on pushover curve has also discussed in the paper. The paper also comments on the plastic hinge pattern.

Author:
Publisher:
ISBN: 9781904482338
Category : Concrete slabs
Languages : en
Pages : 101

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Author: James Grierson MacGregor
Publisher: Prentice Hall
ISBN: 9780136139850
Category : Reinforced concrete
Languages : en
Pages : 939

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Book Description
Based on the 1995 edition of the American Concrete Institute Building Code, this text explains the theory and practice of reinforced concrete design in a systematic and clear fashion, with an abundance of step-by-step worked examples, illustrations, and photographs. The focus is on preparing students to make the many judgment decisions required in reinforced concrete design, and reflects the author's experience as both a teacher of reinforced concrete design and as a member of various code committees. This edition provides new, revised and expanded coverage of the following topics: core testing and durability; shrinkage and creep; bases the maximum steel ratio and the value of the factor on Appendix B of ACI318-95; composite concrete beams; strut-and-tie models; dapped ends and T-beam flanges. It also expands the discussion of STMs and adds new examples in SI units.

Author: Hailemelekot Haileslassie
Publisher: GRIN Verlag
ISBN: 3346266842
Category : Technology & Engineering
Languages : en
Pages : 66

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Master's Thesis from the year 2018 in the subject Engineering - Civil Engineering, grade: very good, Mekelle University (Ethiopian Institute of Technology), course: Msc in structural engineering, language: English, abstract: This thesis presents study of punching shear capacity of flat slab-column junctions. A three dimensional nonlinear finite element program based on 8 node solid elements was used to carry out the nonlinear analysis of flat-slab models with and without gabion-mesh. The effect of gabion arrangements for punching and the ultimate load prediction for each was presented in this thesis. The results obtained from abaqus were compared to code prediction results, and the failure mode also compared to experimental and code predicted failure modes. The predicted mode of failure and other responses are in a good correlation to euro code predicted values. In addition to punching gabion has greater resistance to flexure by increasing the stiffness of the slab. Finally it is concluded that using hexagonal gabion mesh at tension part is easy, effective and can solve construction difficulty of drop panels and one layer gabion can reduce 10mm of slab thickness. Punching strength is a critical point in the design of flat slabs and due to the lack of a theoretical method capable of explaining this phenomenon, empirical formulations presented by codes of practice are still the most used method to check the punching resistance of slab-column connections. Flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. This type of slab is appropriate for most floor situations and also for irregular column layouts. Because of its aesthetic view, simplicity for construction, reduction of foundation cost, this becomes very common and competitive structural system for cast-in-place slabs in buildings. Flat plates allow easy and flexible partitioning of space and reduce the overall height of tall buildings. But since the load is directly transferred from slab to column due to high localized force at the column punching effect or punching shear failure is critical. This type of failure is catastrophic because no visible signs are shown prior to failure. To increase the punching resistance of the flat slab several methods have been used, such as drop panel, column capital, column head and shear reinforcements such as shear stud and stirrups. In our country Ethiopia the first three mechanisms are used to increase the resistance of punching shear in flat slabs but shear reinforcements are being used in other countries such as America and British.

Author: David Cormie
Publisher: Thomas Telford Publishing
ISBN:
Category : Blast effect
Languages : en
Pages : 364

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Book Description
Reflects developments in the field of blast engineering since the early 1990s. Combining coverage of the design standards, codes and materials with an appreciation of the needs and demands of the designer, this book provides the engineer with a comprehensive source of reference for the main elements of blast engineering design in modern practice.

Author: Austin P. Pan
Publisher:
ISBN:
Category : Axial loads
Languages : en
Pages : 290

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Author: Aikaterini Genikomsou
Publisher:
ISBN:
Category : Concrete slabs
Languages : en
Pages : 237

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Book Description
The code provisions for the design of reinforced concrete slabs are based on empirical and mostly statistical formulations derived from the tests. The available testing database consists of different types of slabs and in some cases it is limited due to the extensive cost and time that a punching shear test requires. Thus, there is a need for verification of the actual code provisions and this can be done in part by using finite element (FE) simulations. The finite element analyses (FEA) can supplement the existing testing background and can be used for parametric investigation, since they can indicate different aspects on punching shear failure, leading to possible recommendations for the design codes and models. In this thesis, 3D FEA of reinforced concrete slabs with the FE software ABAQUS using the concrete damaged plasticity model are presented. The appropriate calibration of the concrete model, is done in this study based on an interior slab-column connection without shear reinforcement (SB1), considered as the control specimen, which was tested under vertical loading in a previous study. The predictive capability of the calibrated model was demonstrated by simulating and analyzing different types of slabs without shear reinforcement. Interior specimens under static and reversed cyclic loadings and edge slabs under static and horizontal loadings are examined. The predicted capability of the calibrated model is then examined by simulating slab-column connections with shear reinforcement. Four different modelling approaches for the shear bolts are presented. Discussion and comparison between the design codes are also presented. A parametric study based on the different shear reinforcement patterns that ACI code (rectangular) and EC2 (radial) propose is conducted. This study also involves the investigation of the effect of openings on the punching shear behaviour of the reinforced concrete slabs without shear reinforcement. The effect of the location, the distance from the column and the size of the opening on the punching shear resistance, are investigated. The results, confirm that the punching shear resistance is decreased with an increase in the opening size and with a decrease in the opening distance from the column. Finally, the compressive membrane action effect on reinforced concrete slabs is examined. FEA are performed considering an isolated interior flat slab (SB1) as continuous. The predictive capability of the FEA models enhance their effectiveness for further investigation on the effect of membrane action by supplementing the limited testing background in this area.

Author: Karl Anthony Murray
Publisher:
ISBN:
Category :
Languages : en
Pages :

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