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


Volume 11 Issue 1 March - May 2022

Research Paper

Seismic Evaluation and Rehabilitation of G+1 Corroded RC Building

Dheeraj Kumar Singh* , Harish Chandra Arora**, Shobharam***
* Department of Civil Engineering, Gautam Buddha University, Greater Noida, Uttar Pradesh, India.
** Central Building Research Institute, CSIR, Roorkee, Uttarakhand, India.
*** Gautam Buddha University, Greater Noida, Uttar Pradesh, India.
Singh, D. K., Arora, H. C., and Shobharam. (2022). Seismic Evaluation and Rehabilitation of G+1 Corroded RC Building. i-manager’s Journal on Structural Engineering, 11(1), 1-21. https://doi.org/10.26634/jste.11.1.18651

Abstract

Reinforcing steel corrosion is one of the major cause of degradation in Reinforced Concrete (RC) construction. Corrosion is caused by the processes of carbonation and chloride attack, which results in a reduction in the structural performance of structures over time. The time-dependent corrosion process has an impact on structure safety and serviceability, and it can even lead to progressive failure. Corrosion causes reinforcing bar diameter reductions, concrete fissures, concrete cover expulsion, concrete and steel strength reductions, and the breakdown of the link between the concrete and imbedded steel. When it comes to multistory concrete buildings, corrosion is a considerably bigger issue in terms of seismic performance. As a result, accurately assessing and establishing the current corrosion degree of structural parts, as well as evaluating the local and global seismic capacity of existing corroded RC buildings, has been a major challenge around the world. The current study used a methodology in which revised properties were applied for seismic evaluation and establishing the correct restoration scheme for existing two-story RC framed buildings based on non-destructive and destructive material site as well as laboratory testing. The findings of linear seismic analysis and non-linear static pushover analysis for sound, corroded, and retrofitted buildings have been compared and analyzed and a new corrosion evaluation model is being proposed based on NDT (Non-Destructive Testing) and other established analytical models.

Research Paper

Biaxial Column Design using Visual Basic 6.0

A. Vinod Kumar* , Syed Afzal Basha**, C. Bala Hussainy***, S. Akhil Tej****, C. G. Mohan Babu*****
*-***** Department of Civil Engineering, G Pullaiah College of Engineering and Technology (Autonomous), Kurnool, Andhra Pradesh, India.
Kumar, A. V., Basha, S. A., Hussainy, C. B., Tej, S. A., and Babu, C. G. M. (2022). Biaxial Column Design using Visual Basic 6.0. i-manager’s Journal on Structural Engineering, 11(1), 22-27. https://doi.org/10.26634/jste.11.1.18878

Abstract

Computers have been playing an important role in Civil engineering discipline. The aid of programming languages is unfathomable in designing the Civil engineering structures like buildings, hydraulic structures etc. In this paper, the design of biaxial rectangular or square column is performed for three different columns for different ultimate loading and ultimate moments by an educational software written in Visual Basic (VB) 6.0. The user interface of this software gives results of percentage of minimum steel, area of the steel and orientation of steel bars in bi-axial column. The students expressed their improvement after introducing this robust software. The understanding level of subject by students is analyzed before and after using this software is presented in this paper.

Research Paper

Design and Analysis of a Commercial Complex by using Post Tension Method (Stilt + 12 Floors) with Cost Analysis of Conventional Slab and Post-Tensioned Slab

Naan Babu Chouhan* , Bhanusuresh H. S.**, R. Subash Chandra Bose***
*,*** Department of Civil Engineering, ACS College of Engineering, Bengaluru, Karnataka, India.
** School of Civil Engineering, REVA University, Bengaluru, Karnataka, India.
Chouhan, N. B., Bhanusuresh, H. S., and Bose, R. S. C. (2022). Design and Analysis of a Commercial Complex by using Post Tension Method (Stilt + 12 Floors) with Cost Analysis of Conventional Slab and Post-Tensioned Slab. i-manager’s Journal on Structural Engineering, 11(1), 28-33. https://doi.org/10.26634/jste.11.1.18894

Abstract

This paper deals with the analysis and design of high-rise buildings with post-tensioned slabs. The structure was analyzed and designed for a typical floor. Drawings and other specifications are studied with reference to National Building Code (NBC). Designing structures is a major aspect of Civil Engineering. In further development we use additives and plasticizers, etc. and the building materials change from day to day. In ancient times, buildings were built only from the first floor. i.e., an independent house. At present we are building with steel and more than 13 floors, due to scarcity of land, high price of land and urbanization etc. For the construction of high-rise buildings, we are now moving on to claims and post-tensioning methods. In ancient days materials such as lime, mud, kuchar and surhi etc. were used. Presently buildings are built with materials like cement, sand and steel in their improved forms.

Research Paper

Effect of Replacing Sand with Brick Aggregates in Self-Compacting Concrete

Syed Afzal Basha* , B. Jayarami Reddy**
* G Pullaiah College of Engineering and Technology (Autonomous), Kurnool, Andhra Pradesh, India.
** Rajiv Gandhi University of Knowledge Technologies, Ongole, Andhra Pradesh, India.
Basha, S. A., and Reddy, B. J. (2022). Effect of Replacing Sand with Brick Aggregates in Self-Compacting Concrete. i-manager’s Journal on Structural Engineering, 11(1), 34-40. https://doi.org/10.26634/jste.11.1.18918

Abstract

Numerous studies have been made by the concrete researchers on replacing fine aggregate with construction and demolition waste, but possibly only few materials have been proved to be successful replacement materials for natural fine aggregate in concrete. The present paper explores the results of replacing river sand with Brick Aggregate (BA) which is available in the form of construction waste. The mechanical and microstructural properties of self-compacting concrete by partially replacing river sand with brick aggregate are examined and is compared with Self Compacting Concrete (SCC). The test results showed that the strength achievement of brick aggregate concrete is comparable to self-compacting concrete and the microstructural properties have shown that the brick aggregate has an advantage of internal curing effect.

Research Paper

Finite Element Analysis of Composite Beams with Shear Connectors

Sahana Madiwalar* , Bhanusuresh H. S.**, R. Subhas Chandra Bose***
*,*** Department of Civil Engineering, ACS College of Engineering, Bengaluru, Karnataka, India.
** School of Civil Engineering, REVA University, Bengaluru, Karnataka, India.
Madiwalar, S., Bhanusuresh, H. S., and Bose, R. S. C. (2022). Finite Element Analysis of Composite Beams with Shear Connectors. i-manager’s Journal on Structural Engineering, 11(1), 41-48. https://doi.org/10.26634/jste.11.1.18895

Abstract

In majority of massive structures like bridges and tall buildings there is frequent usage of composite constructions as structural elements. These structures are made of a concrete slab and rolled up steel pieces. By employing shear connectors to join the steel section and concrete slab, the composite action is established. The usage of four distinct shear connector types have been examined in this study, and the optimal connector for a given composite beam has been determined based on how well it performs under static loads while preserving the loading and the amount of steel in the connector as a common factor.