Skeleton: Consultant at Accommodation Facility for MES in New Delhi

Salient Features

• Y shaped building in plan
• Building located in earthquake zone-IV with IF =1.2
• Hollow Tubular sections & LGSF wall system used

Fast Facts

EPC Contractor: Varindera Constructions and Manik Singhal & Co., New Delhi
Architect: Akshaya Jain & Associates, New Delhi
Structural Consultant: SKELETON Consultants, Noida
Steel tonnage: 1100 MT (approx)
Status: Ongoing

Skeleton Consultants successfully tackled a unique project – accommodation facility for MES, Shankar Vihar, New Delhi – involving three Y-shaped, G+3 prefabricated buildings.


The project includes three units of G+3 prefabricated buildings of Y shape with a built-up area of approx 85,000 sq. ft. each. Every Y shaped building has been divided into 4 parts: 3 wings and a central core. Expansion joints have been used for improved behaviour under lateral loads.

The steel-concrete hybrid structure has a sub-structure up to plinth level in concrete while the superstructure is of structural steel. The primary frame of the building comprises moment resisting steel beam-columns and frames with cross bracings in vertical plane at suitable locations, in line with its architecture to resist lateral forces in the event of earthquakes, high winds and to control the deflections.

The floor system comprises of steel beams and joists with concrete slabs over profiled metal deck sheets. Rigid diaphragms in horizontal direction at floor levels have been achieved through concrete screed over deck sheet.

Hollow tubular sections have been used for Columns, Beams, and Bracings, having yield strength of 310 MPa (conforming to IS 4923-2017 & IS 1161-2014). The External & Internal walls (except the wet areas/toilets) are of LGSF walls. In the wet areas/toilets, AAC block masonry has been done.

The structural analysis and design is performed on Staad Pro Connect edition. It was only through rigorous analysis and design iterations, that the structural stability was ensured, while meeting the budgetary constraints (since this was an EPC contract).

Challenges

There were quite a few complexities involved while designing this project. The locations of special moment frames and bracings were carefully chosen to satisfy the design requirement for lateral forces due to high winds, earthquakes, and also for the aesthetics and functional requirements of the building. The steel frames and connections were designed with minute detailing in such a way that they were repetitive, enabling easy and fast erection.

Information courtesy: SKELETON Consultants - a structural engineering consultancy firm for buildings & structures of RCC & Steel.