Affiliation:
1. School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, P.R. China
Abstract
The adverse effects caused by differential axial shortening in high-rise buildings have received increasing attention with growing building height. However, the axial shortening analysis still lacks accuracy compared to the in-situ monitoring results of practical high-rise buildings during construction stage. It is imperative to identify the error sources, and the applicability of the current shortening prediction models should be test verified. In this study, 14 plain concrete columns were cast, and the multi-stage load method was applied to approximately simulate the loading history of axial concrete members during construction stage. The time-dependent deformations of loaded concrete specimens were measured, and a comparative analysis was conducted between test results and numerical prediction values. It is found that the measured deformations of multi-stage loading cases are all underestimated compared with predicted results, and this underestimation may be mainly caused by the inappropriate use of elastic modulus. It further indicates that the axial shortening analysis of high-rise buildings tends to underestimate the actual shortening value when the traditional calculation method is used. This study provides a reference for explaining the mismatch between the analytical results and the actual shortening values.
Funder
National Nature Science Foundation of China
Program of Shenzhen Science and Technology Plan
Guangdong Provincial Natural Science Foundation of China
National key Research and Development Plan
Subject
Building and Construction,Civil and Structural Engineering
Cited by
6 articles.
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