Behavior Of 22m Two Tiered Geogrid Reinforced Soil Wall

Vol.1 No.1

Year: 2012

Issue: Mar-May

Title: Behavior Of 22m Two Tiered Geogrid Reinforced Soil Wall   

Author Name: ANKESH SHRIVASTAVA, D. Kishan                    

Synopsis:   

Two types of 22m Two Tiered and 44m Four Tiered high geogrid reinforced soil walls with same kinds of concrete block wall facing were constructed in Vijayawada Andhra Pradesh in which 22m high vertical reinforced soil wall with concrete block wall facing has been started and using for the transportation purpose. From the beginning of the 22m reinforced wall construction stage, wall displacement or strain of the geogrid, earth pressure, settlement of the foundation ground, etc. were measured for a long period of time. The long term behavior of the geogrid reinforced soil walls was evaluated based on these measurements and observations. This paper present a case history illustrate the use of finite-element procedure as a design aid for the design and analysis of 22m two tiered soil wall by software PLAXIS 8.2. The finite-element analysis provides relevant information on the mechanical behavior that was otherwise difficult to obtain from the limit-equilibrium based current design approaches.

  

 

  

 

Removal Of Chromium Using Natural Adsorbent

Vol.1 No.1

Year: 2012

Issue: Mar-May

Title: Removal Of Chromium Using Natural Adsorbent   

Author Name: Sagar M. Shinde, Shridhar S. Kumbhar   

Synopsis:   

In this present study, adsorption of Cr (VI) ions on tamarind tree bark adsorbent has been studied through using batch adsorption techniques. The main objectives of this study are to 1) investigate the chromium adsorption from aqueous solution by tamarind tree bark, 2) study the influence of pH, contact time, adsorbent dose, particle size and initial chromium concentration on adsorption process and 3) determine appropriate adsorption isotherm and kinetics parameters of Cr (VI) adsorption on tamarind tree bark. The various parameter’s were determined with the help of synthetic chromium sample and by using electroplating industrial wastewater sample, the parameters adsorbent dose, contact time and particle size were determined. The results show that higher Cr (VI) adsorption was observed at lower pH, and maximum Cr (VI) removal 97% obtained at pH value 1.0 with 30 minutes contact time, adsorbent dose 3.75g/l of particle size 150µ and 5mg/l initial Cr (VI) concentration. The adsorption of Cr (VI) by tamarind tree bark powder decreased at the higher initial chromium concentration. The adsorption of Cr (VI) by tamarind tree bark powder increased with increase in adsorbent dose and decrease in size of adsorbent. The obtained results showed that the adsorption of Cr (VI) by tamarind tree bark follows Freundlich isotherm. The results indicate that tamarind tree bark can be employed as a low cost alternative to commercial adsorbents in the removal of Cr (VI) from wastewater.

 

  

 

Optimum Stacking Sequence Design of a Blended Laminated Wing Structure Using Permutation Genetic Algorithms

Vol.1 No.1

Year: 2012

Issue: Mar-May

Title: Optimum Stacking Sequence Design of a Blended Laminated Wing Structure Using Permutation Genetic Algorithms  

Author Name: Dianzi liu, V.V. Toropov, D.C. Barton  

Synopsis:   

The smeared stiffness-based method is examined for finding the best stacking sequence of laminated composite wing structures in a bi-level optimization process with blending and manufacturing constraints. At the global level optimization, the numbers of plies of the pre-defined angles (0, 90, 45 and -45 degrees) are design variables, buckling, strain and ply angle percentages are constraints and the weight is the objective function. Since the permutation Genetic Algorithm (permGA) operator changes the stacking sequence without changing the composition of the laminate in the composite laminate optimization problem, a permGA is an ideal tool to shuffle the plies to minimize the difference between the values of computed lamination parameters for a current stack and the ones coming from the top level, for which the lamination parameters are zeros due to homogeneity throughout the thickness of the laminate assumed in the top level optimization. This is embedded into an easy and efficient blending procedure applied at this level to achieve the global ply continuity. This multi-stage local optimization by permGAs is demonstrated by the optimization of the root part of a generic aircraft wing structure.

 

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Editorial Board Members -Structural Engineering:

Editorial Board Members _ Journal on School Educational Technology_ 2012

S.  No	Authors	Designation	Email Id
1.	Samuel Securro	Faculty, Marshall university graduate center, Graduate school of Education and professional Development, south Charleston, USA.	securro@marshall.edu
2.	James E Osler	Associate Professor, Lead faculty, The graduate program in online instructional design, Department of Research, leadership, and Technology, North Carolina Central University, USA.	josler@NCCU.EDU
3.	Dr. Noor Azina Ismail	Associate Professor, Applied Statistics, Faculty of Economics and Administration, University of Malaya	nazina@um.edu.my or noor_azina@hotmail.com
4.	Chie Castolo	Director, School of open learning & Distance Education, Open university System, polytechnic university of the Philippines, Anonas street, Sta.Mesa, manila city, Philippines.	direk_ou@yahoo.com
5.	Dr. R. Krishna Kumar	Professor of Education, Department of Education, Annamalai University, Annamalai Nagar, Cuddalore Dist.	orkayedn@gmail.com
6.	Dr. William Dharma Raja	Assistant Professor of Education, Manonmaniam Sundaranar University, Tirunelveli, India.	widh07@yahoo.com
7.	Dr. Irshad Hussain	Professor, Department of Education, The Islamia university of Bahawalpur, Pakistan.	irshad_iub@yahoo.com
8.	Sally Blake	Early childhood Education, University of Memphis, Memphis, TN	SBlake@flagler.edu
9.	James E. Folkestad	Associate Professor, Colorado State university, School of Educationa, School of Teacher Education and Principal preparation fort Collins, USA.	James.Folkestad@ColoState.EDU
10.	Dr. Singaravelu Govindarajan	Associate Professor ,UGC-Academic Staff College Bharathiar University Coimbatore	singaravelu.bu@gmail.com
11.	Dr. Tie Hui Hui	SEGi College Penang, Malaysia	tiehuihui@gmail.com

i-managers Journal on Structural Engineering

i-manager’s Journal on Structural Engineering (JSTE)

i-manager's Journal on Structural Engineering (JSTE) provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. The Journal highlights and documents these recent advances, to allow for comparative studies of such advances, and to document future research needs in the field of structural engineering. Typically, published papers describe the development and implementation of new analytical models, innovative numerical methods, and novel experimental methods and results. The Journal aims to focus on high quality papers from academia and practitioners in all areas pertaining to Structural Engineering.

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Review ProcedureThe Journal follows a double blind peer-review process. The submitted articles / research papers are reviewed by Professors/Educators in Structural Engineering.
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