Analysis and Design of Indoor Sports Stadium

Abstract

Indoor stadium is a typical structure that comes under the category of structures with large span column free area. A modern indoor sports stadium is a place or venue for sports, concerts or other events, consisting of a field or stage completely surrounded by a structure designed to allow spectators to stand or sit to view the event. Indoor sports stadium should be designed to satisfy all criteria regarding economy, safety, serviceability and esthetics.

To cover large span column free area there are many structural systems like cable suspended roof structures, single and multilayer grids, braced folded structures, braced domes, Stressed skin systems, tensile membrane structures and tensegritic structures. First three systems I have considered for detailed study.

The objective of the present study is comparison of cable suspended roof structure (single and double layer) system, double layer grid (square on square offset-cornice type) system and braced barrel vault (lamella type) system in context of their cost aspect.

This study is carried out with help of “STAAD-Pro 2005” to obtain accurate analytical results. It is essential to choose proper modeling, loading and support conditions. To check the applicability of software approximate analysis is carried out.

For single cable structure and double cable structure three different types of modeling aspects have been considered.

1. Cable is made of small straight cable elements. 2. Cable is made of only one cable element. 3. Cable is made of small straight beam element.

From the results, 3rd and 1st alternative of modeling proves compatible with approximate analysis for single cable suspended structure and double cable suspended structure respectively. For double layer grid, girder analogy method gives much closer results to exact analysis.

As such space structural systems are light weight structures compared to conventional structural systems. So static and dynamic wind analysis and static seismic analysis carried out. Different load combination is adopted as per Indian standards for the analysis of structure. Here, different types of connections is developed for different structural systems like cable-strut, cable-column (hinge connection), cable to ground, Mero node connectors, Steel tube to column, RHS to RHS, RHS to concrete column, sitting gallery, beam column junctions etc.

Comparative analysis of all three structural systems is carried out and shown for area of 40 m X 60 m.