Proceedings of the International Symposium on Engineering Lessons Learned from the 2011 Great East Japan Earthquake.
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Structural engineers are concerned with the consequences of shrinkage, creep and cracking on the serviceability and durability of their structures. Creep increases deflections, reduces prestress in prestressed concrete elements, and causes redistribution of internal force resultants in redundant structures. Shrinkage can cause warping of slabs on grade due to differential drying and increased deflections of non-symmetrically reinforced concrete elements. Materials scientists are concerned with understanding the basic phenomena and assessing new materials and the effects of admixtures on the mechanical behavior of concrete.
Concrete is an age stiffening material that has little tensile strength, shrinks, and exhibits creep in sealed conditions and additional creep in drying environments. Predicting the amount of shrinkage and deflection that may occur is not easy and is especially complicated in concrete that contains supplementary materials, chemical admixtures, and lightweight aggregates. Supplementary cementing materials and waste products are being used in increasing volumes in response to environmental concerns. Admixtures have been developed to modify the behavior of fresh and hardened concrete. Self consolidating concrete is being used in more applications. A recent development is the marketing of shrinkage reducing admixtures.
This volume contains papers presented during four sessions sponsored by ACI Committee 209, Creep and Shrinkage in Concrete, and ACI Committee 231, Properties of Concrete at Early Ages, held at the Spring 2005 Convention. The subjects addressed by the authors are diverse and cover many aspects of shrinkage and creep. Some papers pay special attention to the development, use, and evaluation of models to predict shrinkage, creep, and deflection, while other papers consider the behavior of early age concretes that are restrained from shrinking, resulting in the development of residual stress and cracking.
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Influence of Axial Stress on Shear Response of Reinforced Concrete Elements
Author: Liping Xie, Evan C. Bentz, and Michael P. Collins | Size: 1 MB | Format:PDF | Quality:Unspecified | Publisher: Structural Journal | Year: November 1, 2011 | pages: 10 | ISBN: Volume:108, Issue:6
Abstract:
There is strong disagreement between different code provisions as to the influence of axial stress on shear strength. To examine this influence, six nominally identical reinforced concrete elements representing web regions of girders or walls were loaded under different ratios of longitudinal axial stress to shear stress. The results demonstrated that the application of the basic ACI 318-08 shear approach can significantly overestimate both the beneficial effect of compression on shear and the detrimental effect of tension on shear strength. The ACI 318-08 simple expression for the benefits of compression gave excellent predictions, whereas the simple expression for tension was very conservative. The CSA A23.3-04 shear provisions based on the modified compression field theory (MCFT) provided the best code-based estimates of the shear strength. The full MCFT provided not only the best estimates of conditions at failure—including failure shear stresses and failure crack angles for the full range of axial stresses—but also provided predictions of the complete load-deformation response of the elements. For the two highest compression-to-shear ratios, these load-deformation predictions were reasonable, whereas for the other axial load levels, they were excellent.
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AutoPIPE provides a comprehensive and advanced software tool specialized in pipe stress analysis. The intuitive modeling environment and the advanced analysis features provide for increased productivity and improved quality control.
Piping Codes
- ASME B31.1, B31.3, B31.4, B31.8
- ASME Sec. 3, Class II and III
- European Standard Metallic Industrial Piping EN13480
- B31.4 Offshore, B31.8 Offshore & CSA_Z662 Offshore codes
- Canadian CAN/CSA–Z662
- British Standard BS 806, BS 7159 (GRP piping code)
- Swedish Piping Code (SPC) Method 2
- Norwegian Det Norske Veritas (DNV) and TBK 5-6
- Dutch Stoomwezen D1101
- Japanese KHK, MITI class 3 and General Fire Protection code
- French RCC-M and SNCT
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IMPORTANT NOTICE: You may use this software for evaluation purposes only.
If you like it, it is strongly suggested you buy it to support the developers.
By any means you may not use this software to make money or use it for commercial purpose.
Title:Dynamic Characterisation of Base-Isolated Structures Using Analytical Shear-Beam Model
Authors:Vasant A. Matsagar,R. S. Jangid
Source: International Journal of Acoustics and Vibration, Vol. 11, No. 3, 2006
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Buckling Analysis of a Super-Large Storage Tank
Authors: Fan Bu, Cai Fu Qian, Xue Dong Chen, Tie Cheng Yang
Journal: Advanced Materials Research (Volume 487)
Pages: 237-241
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This is the detailed design calculation of Building using SAP, includes.
1) Load calculations
2) Wind load calculations
3) Manual designs based on SAP out put as per ACI-318 in metric units.
This is the project done by a student .
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Boundary Methods: Elements, Contours, and Nodes presents the results of cutting-edge research in boundary-based mesh-free methods. These methods combine the dimensionality advantage of the boundary element method with the ease of discretization of mesh-free methods, both of which, for some problems, hold distinct advantages over the finite element method.
After introducing some novel topics related to the boundary element method (BEM), the authors focus on the boundary contour method (BCM)-a variant of the BEM that further reduces the dimensionality of a problem. The final section of the book explores the boundary node method, which combines the BEM with moving least-squares approximants to produce a mesh-free, boundary-only method.
The authors, who are also the primary developers of these methods, clearly introduce and develop each topic. In addition to numerical solutions of boundary value problems in potential theory and linear elasticity, they also discuss topics such as shape sensitivities, shape optimization, and adaptive meshing. Numerical results for selected problems appear throughout the book, as do extensive references.
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Author: M. M. Woolfson, G. J. Pert | Size: 13.9 MB | Format:PDF | Quality:Original preprint | Publisher: Oxford University Press | Year: April 8, 1999 | pages: 328 | ISBN: 019850425X, ISBN-13: 978-0198504252
Computer simulation is increasingly used in physics and engineering to predict the probable outcome of experiments and to aid in their interpretation. The methods of simulation are based on a range of numerical techniques for treating ordinary and partial differential equations. Since much of physics can be broken down into a relatively small set of fundamental equations, a few general methods can be widely applied. This text aims to give an introduction to those methods suitable for readers at an undergraduate level and for those studying the subject for the first time at the graduate level. The methods are illustrated with simple programs and problems. The book covers a range of material not available in other introductory texts.
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This book provides insight in the mathematics of Galerkin finite element method as applied to parabolic equations. The approach is based on first discretizing in the spatial variables by Galerkin's method, using piecewise polynomial trial functions, and then applying some single step or multistep time stepping method. The concern is stability and error analysis of approximate solutions in various norms, and under various regularity assumptions on the exact solution. The book gives an excellent insight in the present ideas and methods of analysis. The second edition has been influenced by recent progress in application of semigroup theory to stability and error analysis, particulatly in maximum-norm. Two new chapters have also been added, dealing with problems in polygonal, particularly noncovex, spatial domains, and with time discretization based on using Laplace transformation and quadrature.
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