|Table of Contents|

Calculation method of eccentric load-bearing capacity of L-shaped column composed of recycled aggregate concrete-filled square steel tube(PDF)

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

Issue:
2025年01期
Page:
82-89
Research Field:
建筑结构
Publishing date:

Info

Title:
Calculation method of eccentric load-bearing capacity of L-shaped column composed of recycled aggregate concrete-filled square steel tube
Author(s):
MA Tengfei1; 2; 3;  CHEN Zhihua1;  DU Yansheng1
(1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Department of Civil Engineering, North China Institute of Aerospace Engineering, Langfang 065000, Hebei, China; 3. Technical Innovation Center of Building Insulation and Structure Integration in Hebei Province, Langfang 065000, Hebei, China)
Keywords:
concrete-filled square steel tube column;  L-shaped column;  recycled concrete;  eccentric compression bearing capacity;  calculation method
PACS:
TU398
DOI:
10.19815/j.jace.2022.07095
Abstract:
According to the superposition principle, the calculation method of eccentric compression bearing capacity of L-shaped column composed of recycled aggregate concrete-filled square steel tube(L-RACFST)was studied based on the theoretical calculation formula provided by the Technical Specification for Special-shaped Column Structure Composed of Concrete-filled Rectangular Steel Tubes. Considering the effect of recycled concrete effective restraint area, the calculation formula of eccentric bearing capacity of the L-RACFST was put forward, and the axial force-bending moment (N-M) relationship curve was drawn. The results show that by introducing the restraint influence coefficient of the steel tube on the recycled coarse aggregate(RCA), considering the effective restraint effect of the steel tube on the recycled concrete with different RCA replacement ratio, and dividing the restraint area of steel tube on RAC according to the constraint strength, the effective restraint area of recycled concrete can be obtained. By comparing with the experimental and numerical simulation results, the validity of the calculation formula of the eccentric compression bearing capacity of the L-RACFST is verified. The formula can be used to predict the eccentric compression bearing capacity of the L-RACFST, and the N-M relationship curve can predict the bearing capacity of the specimen more accurately and safely.

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Last Update: 2025-01-20