International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 06 | Jun 2024
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p-ISSN: 2395-0072
Comparing Contemporary Realistic Load Demands and Design Performance with Code Minimum Loads for Residential Floors Srimaruthi Jonnalagadda1, Sitaram Vemuri 2 1Honorory Professor, Department of Civil Engineering, V.R Siddhartha Engineering College, Vijayawada 2Structural Engineer, Assystem Stup, Bangalore
-----------------------------------------------------------------------***-----------------------------------------------------------------------Abstract: The Indian standard code specifications for the design of residential buildings provides guidelines and sets
minimum required loads to be considered for safe and durable performance of the building. The engineers design the floor slabs using these minimum design loads and performance specifications unless special requirements are listed on the contract drawings. However, these minimum mandated loads were derived decades back based on the socio-economic conditions at the time of their drafting. The changed socio-economic conditions vary very significantly from those days. Contemporary residential building floors carry a wide array of loads due to various mechanical, electrical, and electronic choices which are offered to consumers in the form of machines for easier and comfortable living style. However, there is no revision of design loads from Indian Standards for the design of floors in the last few decades. This study originated from this idea to evaluate the impact of these heavier household loads on the floor slabs. In this study, residential imposed and live loads are created based on the revised intensities, types and layout of the building usage based on equipment footprint and use. Finally, analysis and design of the floor slabs are performed for the upgraded residential loads and layouts. The sufficiency of floor slabs designed with revised current load layouts is evaluated and compared to that of conventional loads specified by Indian standard codes.
Keywords: Floor, Loads, Design, Infrastructure, Sustainability, Resilience 1. Introduction The minimum load requirements specified in standard code bodies across the world for structural design are based on load types and intensities that closely replicate the typical lifestyles of individuals and societies which are in turn linked to existing socio-economic conditions. However, as the socio-economic conditions change, life stye changes inevitably follow [1, 2]. The advent of new machines and new lifestyles change the way we layout our residences and offices. The new equipment and new comforts bring in bigger items that not only take up more space but also add extra weight. This paper is written in the context of Indian housing, the socio-economic and lifestyle changes in India. In the last two decades India grew tremendously. Its Gross Domestic Product (GDP) is fourth largest in the world and with a large majority of its population young the country is rapidly repositioning itself technologically and economically [3]. This naturally improved the financial standards of the people and led to higher consumer buying. These days vitrified tiles that are about 10 to 15mm thick are commonly laid out on floor slabs. Bigger beds, bigger sofa sets, washing machines have become common additions to households. Though new and novel methods of construction evolved [4], and so are the new materials [5] with very high strengths and performance [6], the loads did not evolve in line with the socio-economic changes. The original residential floor imposed and live loads currently still in the specifications by the Bureau of the Indian Standards [7, 8] are based on equivalent uniform loads created based on mechanical and electrical commodities commonly in use during those days. However, the advent of larger and heavier equipment into our homes brings a natural question; are our building floors still subjected to the same intensity as the loads? How do the performance parameters such as deflections and stresses in the slabs compare to the code-based loads? To answer these questions, the authors attempted to analyze a typical residential floor slab subjected to a layout of point loads and uniform loads derived based on contemporary realistic loads that our residential floor slabs are being subject to because of these bigger commodities, machines, and devices in our homes.
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