|Table of Contents|

Numerical simulation study on flexural and shear behavior of concrete beam with steel-bar truss(PDF)

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

Issue:
2025年03期
Page:
37-47
Research Field:
建筑结构
Publishing date:

Info

Title:
Numerical simulation study on flexural and shear behavior of concrete beam with steel-bar truss
Author(s):
ZHANG Pengcheng1; 2;  ZHENG Shaofeng1;  WANG Quanmin3;  WEI Zhenhai4;  LIN Xinqiang5;  LIAO Jinjie5;  CHEN Pingyang6
Keywords:
reinforced concrete beam;  steel-bar truss;  diagonal web reinforcement;  flexural behavior;  shear behavior;  numerical simulation
PACS:
TU375
DOI:
10.19815/j.jace.2023.12094
Abstract:
By welding diagonal web reinforcement in the steel cage of ordinary concrete beams, the steel-bar truss can be made to bear construction loads, so as to avoid the support of the brackets. In order to study whether the use of steel-bar truss without formwork construction will affect the later stress performance of the constructed beams, a detailed finite element model was established to analyze and compare the performance differences between reinforced concrete truss beams and ordinary reinforced concrete beams. The results show that for general simply supported beams, the amount of diagonal steel bars added to avoid formwork is about 12% of the total amount of steel bars in the original beam. During the construction phase, the steel-bar truss can only bear its own weight construction load, and the maximum strength stress ratio of the corresponding stressed steel bar is not greater than 0.2. The steel-bar truss does not change the area of tensile steel bars in the beam, and after completion, the bending capacity of the beam cross-section is increased, resulting in better ductility. The effect of inclined section shear is the same as that of setting bent steel bars, and can be calculated according to the standard formula.

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Last Update: 2025-06-01