Vol 2 Issue 2 October 2014-March 2015

Abstract: The main purpose of the presented study is the investigation of the dynamic parameters of reinforced concrete frames with and without infill walls. Moreover, lateral strength, stiffness and time of collapse of the frames are also studied. In order to achieve the purpose a 8 storey building was designed and then IDARC software was used to observe the influence of infill walls. Presence of partition walls affected the damaged behavior of the frames and drift is observed to be higher in case. And finally stiffness, strength and energy dissipation properties of frames with partition walls are observed to be dramatically higher than the frames without partition walls. A study is conducted at the NATIONAL INSTITUTE OF TECHNOLOGY SGR using IDARC software. The main objective is to investigate the dynamic behavior of seismically detailed RC frames with and without partition walls. Other objectives are to examine the stiffness and strength behavior of RC frames with partition walls, to observe the interaction between frame and infill wall. Program consisted of testing of eight 8-STOREY frames using IDARC software. Frames were designed considering two parameters: reinforcement detailing and the presence of infill walls. Frames were subjected to inelastic dynamic analysis with increasing intensity of ground acceleration. The study is conducted on the same frame by organizing the partition wall configuration as bare frame (BF), partially infilled frame (PIF) and fully infilled frame (FIF).

Title: How the Seismic Behavior of RC Framed Structures Varies by Changing Position of Infill Walls

Author: Waseem Raja

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: In present study, Multistory Rigid Jointed Steel Framed Regular Building Modal has been analyzed by static, dynamic and pushover procedures. The post processing results obtained are compared to get some important concluding remarks. The various results obtained are compared to find out differences in Nodal Displacements and Beam End Forces. This study will emphasize on the requirement of non-linear analysis procedures with the existing linear analysis procedures provided by various codal provisions. Present study will help in evaluating the difference in various parameters during elastic (conventional) and inelastic (pushover) analysis.

Keywords: Seismic, Maximum moment, Linear, Non-linear (pushover)

Title: Analysis of Nodal Displacement and Beam End Forces for Multistoried Framed Structure

Author: Praveen Thakur, Dr. Suresh Kushwaha,Prabhat Soni

International Journal of Civil and Structural Engineering Research   

ISSN 2348-7607 (Online)

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Abstract: Damage can be defined as change introduced into a system that adversely affects its current or future performance. It is a relative measure determined through comparisons between a current state of structure and an initially undamaged state. Damage in a structure can pose serious threat to its structural integrity. Thus Structural Health Monitoring, the process of identifying the damage in a structure and its adverse effects and suggesting a suitable remedy becomes important. This study aims at developing an automatic method for the damage detection in the structures and its analysis. Detection of damages is carried out using image processing techniques and these damages are analyzed using commercial FEA software. Digital image processing involves using computer algorithms to perform image processing on digital images. As a subcategory or field of digital signal processing, digital image processing have many favours over digital image processing. It takes a much range of algorithms to be applied to the input data and it can avoid problems such as noise and signal distortion during processing. Since the images defined over two dimensions analog image processing may be modelled in the form of structural systems.

In the present work, cubes and cylinders are casted, tested and are modeled and CT scanner. Two types of beams were casted. One was a normal healthy plain concrete beam and the other one was a damaged beam in which damage was induced in the form of shear notch crack. These are modeled and analyzed using finite element software ANSYS, which has the required pre- and post- processing options to capture the stresses and displacements developed in the beam.

Keyword: CT scan, concrete structures, x-ray, and ANSYS etc

Title: Damage Detection in Beams by Advanced Radiographic Testing

Author: Ashwin V A, Sahana T S

International Journal of Civil and Structural Engineering Research   

ISSN 2348-7607 (Online)

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Abstract: This study investigates the seismic performance of shear wall building on sloping ground. The main objective is to understand the behaviour of the building on sloping ground for various positions of shear walls and to study the effectiveness of shear wall on sloping ground. The performance of building has been studied with the help of four mathematical models. Model one is of frame type structural system and other three models are of dual type (shear wall- frame interaction) structural system with three different positions of shear walls. Response spectrum analysis is carried out by using finite element software SAP 2000. The performance of building with respect to displacement, story drift and maximum forces in columns has been presented in this paper.

Keywords: Sloping ground, Shear wall, Position, Performance, Earthquake analysis, Effectiveness.

Title: Seismic Analysis of Building with Shear Wall on Sloping Ground

Author: Prasad Ramesh Vaidya 

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: The object of this paper is to investigate the effect of adding different chloride compounds including (NaCl, CaCl2, and MgCl2) on the engineering properties of silty clay soil.  Various amounts of salts (2%, 4%, 8%) were added to the soil to study the effect of salts on the compaction characteristics, consistency limits and compressive strength.The main findings of this study were that the increase in the percentage of each of the chloride compounds increase the maximum dry density, decrease the optimum moisture content. The liquid limit, plastic limit and plasticity index decreased with the increase in salt content. The unconfined compressive strength increased as the salt content increased.

Keywords: Soil Stabilization, Silty Clay Soil, Consistency Limit, Unconfined Compressive Strength

Title: A Laboratory Evaluation of Stabilization of Salty Clay Soil by Using Chloride Compounds

Author: Tamadher Abood, Mohamed A. S. Mohamed

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: An Engineered Cementitious composite is an ultra ductile cementitious composite which is highly crack resistant, with a tensile strain capacity over that of normal concrete. Engineered Cementitious Composites is similar to Fiber Reinforced Concrete. FRC contains water, cement, fine and coarse aggregate, fiber, and some common chemical additives. But only difference between FRC and ECC is, in ECC coarse aggregates are not used as they tend to adversely affect the unique ductile behavior of the composite. Polypropylene fibers have advantageous characteristics, the weak bond with the cement matrix as a result of their smooth surface and chemical inertness remains a large limitation. It has been demonstrated that the fiber-matrix bond strongly affects the ability of fibers to stabilize crack propagation in the matrix. As the bond between fiber and matrix is mainly mechanical, it seems that incorporating silica fume into fiber reinforced cement composites provides a better bond with the matrix through pore refinement and better distribution of the hydration products. Hence, in this project an effort was made to study the effect of PP fibers on the mechanical properties of mortars incorporating silica fume. Six fiber volume fractions 0%, 0.1%, 0.2%, 0.3%, 0.4% and 0.5% were considered. The experimental study is to present the behaviour of prism with optimum percent of fibers under two point loading.

Keywords: Engineered Cementitious Composites, polypropylene fiber, cement paste, silica fume, and properties of concrete.

Title: Experimental Investigation of Polypropylene Fiber in Engineered Cementitious Composites

Author: Ms.E. Ramya, Ms. S. Nalini, Mrs. S. Sivaranjini, Mr. R.M. Saravanakumar

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: As we all know that world’s population is increasing day by day. Increasing population increases the vehicle use. So, now parking has become a major issue now a day. There is a huge demand of proper parking facilities. In order to short out the parking demand, we need to study the parking pattern so that we can improve the parking facilities. I collected data from different parking space in my University. Initially we figured out what is the variation of PCU (Passenger Car Unit) with a certain time and then we compared all these data with the help of “t- test“ to find out whether these parking pattern are same or different.

Keywords: Parking, PCU, t-test, Pattern.

Title: Study of Parking Patterns for Different Parking Facilities

Author: Sitesh Kumar Singh

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: Shear Wall And Steel Bracing Systems Are Most Widely Used In Medium To High Rise Buildings To Provide Stiffness, Strength And Energy Dissipation Required To Resist Lateral Load Imposed By Earthquakes And Wind. In The Past Shear Wall And Steel Bracing Have Been Proved As Most Feasible Solution For Seismic Retrofitting Or Strengthening Of Buildings. The Newly Adopted Performance Evaluation Methodology And Capacity Design Principles Are Examples Of These Important Advancements In Seismic Engineering. Many Existing Rc Buildings Need To Retrofit To Overcome Weaknesses To Resist Seismic Loads. Therefore, There Is An Essential Need To Upgrade The Seismic Performance Of Existing Rc Buildings So That They Can Meet The Requirements Of The New Performance-Based Seismic Design Techniques.

In This Paper, Seismic Performance of RC Building Rehabilitated With Shear Wall and Concentrated Steel Bracing. An Earthquake Load Is Calculated And Applied On Nine Stories Building Located In Zone Iii. A Comparison Has Been Made Between The Effectiveness Of Different Types Of Steel Bracings With Concrete Shear Wall At Different Locations Of The Building. The Performance Of The Building Is Evaluated In Terms Of Story Drifts, Lateral Displacements, Bending Moments And Base Shear.

Keywords: Retrofit, Seismic Strengthening, Steel bracings, Shear walls.

Title: A Comparative Study of Seismic Strengthening of RC Buildings by Steel Bracings and Concrete Shear walls

Author: Yaseer Alashkar, Sohaib Nazar, Mohammad Ahmed

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: In present scenario buildings with Floating Column is a typical feature in the modern multistory construction in urban India. Such features are highly undesirable in building built in seismically active areas. This study highlights the importance of explicitly recognizing the presence of the Floating Column in the analysis of building. Alternate measures, involving stiffness balance of the first storey and the storey above, are proposed to reduce the irregularity introduced by the Floating Columns. FEM analysis carried for 2D multi storey frames with and without floating column to study the responses of the structure under different earthquake excitation having different frequency content keeping the PGA and time duration factor constant. The time history of roof displacement, inter storey drift, base shear, column axial force are computed for both the frames with and without Floating Column.

Keywords: Floating column, stiffness balance, FEM codes, earthquake excitation, time history, roof displacement, Inter storey drift, base shear, column axial force.

Title: Seismic Analysis of Multistorey Building with Floating Column

Author: Sabari S, Mr.Praveen J.V

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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Abstract: The structural action of a beam is predominantly bending, with other effects such as shear, bending and buckling also being present. The corrugated steel plate is a widely used structural element in many fields of applications because of its favourable properties. Present study aimed to investigate bending and buckling performance of plate girder with flat web section and corrugated web section of different corrugation pattern namely triangular and rectangular. The finite element analysis of plate girder is carried out using SAP2000. For present study total twenty one models were obtained for analysis. Thickness of web of all models varied from 1mm to 3mm incrementally at 1mm; under corrugated web of triangular pattern different angles (300, 450 and 600) are studied and under corrugated web of rectangular pattern different corrugation width (100mm, 200mm and 400mm) are studied. Results obtained from analysis are then compared with plate girder with flat web section of uniform depth. It is observed that plate girder with triangular web section and rectangular web section has higher stiffness about minor axis and has lower stiffness about major axis when compared with plate girder with flat web section. Maximum buckling strength is observed in plate girder with triangular web section and rectangular web section when compared with flat web section.

Keywords: Plate girder, corrugated web, finite element analysis, buckling strength, bending performance.

Title: BUCKLING STRENGTH AND BENDING PERFORMANCE OF PLATE GIRDER WITH FLAT WEB AND CORRUGATED WEB

Author: Sachin K.G, Mrs.Sowjanya G.V

International Journal of Civil and Structural Engineering Research

ISSN 2348-7607 (Online)

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