Effects of opening in shear walls of 30- storey building

Tall towers and multi-storey buildings have fascinated mankind from the beginning of civilization, their construction being initially for defense and subsequently for ecclesiastical purposes. These tall buildings because of its height, is affected by lateral forces due to wind or earthquake actions tends to snap the building in shear and push it over in bending. In general, the rigidity (i.e. Resistance to lateral deflection) and stability (i.e. Resistance to overturning moments) requirement become more important. Shear walls (Structural walls) contribute significant lateral stiffness, strength, and overall ductility and energy dissipation capacity. In many structural walls a regular pattern of openings has to be provided due to various functional requirements such as to accommodate doors, windows and service ducts. Such type of openings reduces the stiffness of the shear wall to some extent depending on the shape and size of the opening. In the present parametric study, efforts are made to investigate and critically assess the effects of various size of openings in shear walls on the responses and behaviors of multi-storey buildings. The 30 storey Prototype buildings with different types of openings in shear wall with and without incorporating the volume of shear wall reduced in the boundary elements are analyzed using software E-TABS using Response spectrum method (1893(Part-1)-2002) and Time history method

Numerical simulation of Wind induced mean interference between two tall buildings

The assessment of wind loads on structure is generally carried out using existing codes/standards. The specifications of these codes are based on wind tunnel experiment performed on an isolated building. However, the buildings seldom exist in isolated condition. Neighbouring building may either increase or decrease the wind loads on principal building, this effect is known as interference effect. In this paper interference effect between two buildings is studied through numerical simulation using ANSYS CFX. Total drag force and interference factors for the principal building is calculated in the presence of interfering building having height ratio of 0.5, 0.75,1, 1.25, and 1.5. The results show that the upstream interfering buildings cause certain shielding effect by decreasing the mean wind load on the downstream principal building. However an amplification effect is also observed for certain location of the interfering building on upstream side. For buildings of the same cross-section, the interference factor (IF) decreases with the increase of the height of interfering building, indicating increase in the shielding effects. However the shielding effect on principal building is found to be significant when the heights of interfering buildings range from 0.75 to 1.5 of the height of the principal building. The along-wind force of the downstream principal building reduced to zero when the upstream interference building of height ratio more than one was two to three times the building breadth away from the principal building

Evaluation of Shear Wall-RC Frame Interaction of High-Rise Buildings using 2-D model Approach

The usefulness of structural walls in the framing of buildings has long been recognized. It is generally preferred to use shear wall in combination with moment resisting frame. In the present study, an effort is also made to investigate the shear wall-RC frame interaction using 2-D modeling of 20, 30 and 35 storey RC frame building with shear wall. In equivalent simplified 2-D model, two exterior frames with shear wall modeled as single frame with double stiffness, strength and weight. The interior frames without shear wall are modeled as a single frame with equivalent stiffness, strength and weight. The modeled frames are connected with rigid link at each floor level. Using 2-D plane frame model the lateral force distribution between Exterior frame with shear wall and Interior frame without shear wall is investigated. From the analysis, it is observed that up to bottom seven/eight storey more than 50% load is taken by frame with shear wall and the lower most three storeys take about 75% of total storey shear

Evaluation of response reduction factor and ductility factorfor RC braced frame

Response reduction factor is the factor by which the actual base shear force should be reduced, to obtain the design lateral force during design basic earthquake (DBE) shaking. The response reduction factor (R) is basically depends on Over strength (Rs), Ductility (Rµ), Redundancy (RR). So there is a need to come up with realistic R factors for different structural systems used in various countries. In the present study efforts are made to evaluate the response reduction factor and ductility of RC braced frame using nonlinear static pushover analysis. The types of the frame considered in this study are RC frame with X bracing at centre bay, RC frame with X bracing at alternate bays, shear wall at canter and alternate bays. The result of this study shows that R factor and lateral strength of RC frames are considerably affected by the types and arrangement of the bracing system

Scientometric Analysis of the Research Output of Biochemistry, Genetics and Molecular Biology of Gujarat University, Ahmedabad

This paper presents a scientometric analysis of research output of biochemistry, genetics and molecular biology from the Gujarat University, Ahmedabad. The research article was published during 1980-2018. However, the data was collected and indexed in Scopus were considered for the analysis included a total of 400 publications. Various scientometric indicators have been calculated to acquire an appropriate perception of the growth and current status of research output of Gujarat University, Ahmedabad. The paper also analysed the publication trend of Gujarat University. The other aspects that were identified in the paper were the most prolific authors, collaborative authorship patterns and trends, most preferred publications, etc

Scientometric Analysis of the Research Output of biochemistry, Genetics and Molecular Biology of Gujarat University, Ahmedabad

This paper presents a scientometric analysis of research output of biochemistry, genetics and molecular biology from the Gujarat University, Ahmedabad. The research article was published during 1980-2018. However, the data was collected and indexed in Scopus were considered for the analysis included a total of 400 publications. Various scientometric indicators have been calculated to acquire an appropriate perception of the growth and current status of research output of Gujarat University, Ahmedabad. The paper also analysed the publication trend of Gujarat University. The other aspects that were identified in the paper were the most prolific authors, collaborative authorship patterns and trends, most preferred publications, etc

Growth and Productivity of Agricultural and Biological Sciences Research in State Agriculture Universities of Gujarat (India)

This paper presents a scientometric analysis of the growth and productivity of agricultural and biological sciences research in state agriculture universities of Gujarat, India. 1742 publications that appeared in the Scopus database during 2010-2019 have been taken for the analysis. Aspects like patterns and trends about authorship pattern, the ranking of authors based on number of publications and citations, highly productive Universities, degree of collaboration between authors, highly cited papers, etc. are considered for analysis and drawing the conclusion

Developing Video Archive Library Using Omeka: An Open Source Digital Library Management System

The purpose of this paper is to aware LIS professionals and students about a Video library for educational video content using Open Source DLM Software - OMEKA. This paper will discuss about the importance of Video Library for developing new education serve platform, within the context of Digital Media and Digital Library environment. OMEKA has been adopted by large number of Libraries and Museums at outside of India. This paper will highlight the brief description of OMEKA DLMS. And also focus in detail with how to create Video Library using OMEKA DLMS; which includes online exhibition, video archive and connect with social networks

Scientometric Analysis of the Research Output of biochemistry, Genetics and Molecular Biology of Gujarat University, Ahmedabad

This paper presents a scientometric analysis of research output of biochemistry, genetics and molecular biology from the Gujarat University, Ahmedabad. The research article was published during 1980-2018. However, the data was collected and indexed in Scopus were considered for the analysis included a total of 400 publications. Various scientometric indicators have been calculated to acquire an appropriate perception of the growth and current status of research output of Gujarat University, Ahmedabad. The paper also analysed the publication trend of Gujarat University. The other aspects that were identified in the paper were the most prolific authors, collaborative authorship patterns and trends, most preferred publications, etc