|Table of Contents|

Study on Equivalent Stress Diagram Coefficient of Concrete Compression Zone with Flange Section(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年06期
Page:
87-93
Research Field:
结构工程
Publishing date:

Info

Title:
Study on Equivalent Stress Diagram Coefficient of Concrete Compression Zone with Flange Section
Author(s):
REN Wei1;  LI Jing-quan1;  LI Xiao-lu2
(1. Key Laboratory of Transport Industry of Bridge Detection Reinforcement Technology, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Guangdong Provincial Transportation Planning and Research Center, Guangzhou 510101, Guangdong, China)
Keywords:
concrete structure;  flange section;  equivalent stress diagram coefficient;  analytical solution;  simplified calculation method
PACS:
U445.72
DOI:
10.19815/j.jace.2021.09078
Abstract:
Aiming at the problem that the calculation method of the equivalent stress diagram coefficient α and β of concrete compression zone with flange section is vacant, the analytical solutions of the equivalent stress diagram coefficient of the flange section considering the geometric parameters and material parameters of the section were obtained by taking the section balance as the only condition for establishing the basic equation, and the influence of the geometric parameters on the equivalent stress diagram coefficient was analyzed. In order to improve the applicability of the analytical formula, the analytical solution was refitted, and the simplified calculation formulas of α and β with high fitting degree were obtained, and the recommended values of the equivalent stress diagram coefficients of the commonly used cross-section were given. The results show that the coefficient α decreases with the increase of the ratio of beam web width to flange plate width b/bf, and increases with the increase of the ratio of flange plate thickness to section effective depth hf/h0, showing the characteristics of surface variation. β increases with the increase of b/bf, and shows a curve change with the change of hf/h0, showing the characteristics of slightly distorted surface. The recommended simplified formula has high accuracy and can be directly applied to the analysis and calculation of concrete section with flange. The recommended value of equivalent stress diagram coefficient can provide scientific support for the revision of concrete specification.

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Last Update: 2022-12-20