The Inner Force Analysis of a Long Span Pre-Stressed Multi-Story Building Based on Special Construction Process Requirement

Abstract

This study case comes from a large-scale comprehensive gymnasium that is under construction. It is a frame structure, and the total height is 23.5m, and the main beam in 2nd and 4th floor are post-tensioned bonded pre-stressed concrete structure with a longs span to 27m. As the thickness and the ration of steel bars of the bottom slab could not bear the load caused by construction and besides, before the terminal tension, the bracing to support the template could not be demolished to turnover; so, the plan that needs to tense from the upper floor to lower floor recurrently has not been adopted. Another construction process that proposes to tense the beams in one floor as soon as they are casted .However, Due to construction time limit and cost, this plan was not carried out. At last, we combining the two plans. In our plan, pre-stress tension and building construction were carried out simultaneously. According to accurate analysis of construction propose and flow, with careful check on main components, security, economics and building functions are uniformed together optimally.