Numerical Analyses for Precast RC Structures at Fire Condition in Underground Space

Abstract

To create sustainable urban development, it is widely recognized that underground space development is a long-term solution to cater for future economic growth. In urban cities, many underground projects have been constructed to mitigate the increasing demand for land and infrastructure. For structures in very deep underground construction, prescriptive fire code require 4 hour-rating for structures. In this paper, a typical 2 hour-rating RC frame structure is designed for underground space. Standard fire curve (ISO-834) is applied to affected RC members under certain fire scenarios. Numerical results show that with the help of tensile membrane action, even a 2-hour fire rating RC beam-slab system can achieve satisfactory result