Title: Behavior of CFT steel columns damaged by thermal shock // Magazine of Civil Engineering. – 2021. – С. 10808
Creators: Al-Rousan R.
Imprint: 2021
Collection: Общая коллекция
Subjects: Строительство; Строительная механика; steel columns; damaged columns; heat stroke; cyclic side loads; side loads; reinforced polymers; стальные колонны; поврежденные колонны; тепловые удары; циклические боковые нагрузки; боковые нагрузки; армированные полимеры
UDC: 624.04
LBC: 38.112
Document type: Article, report
File type: PDF
Language: English
DOI: 10.34910/MCE.108.8
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)
Record key: RU\SPSTU\edoc\67996

Allowed Actions: Read Download (2.1 Mb)

Group: Anonymous

Network: Internet


Experimental evaluation of the structural behavior of concrete-filled tubular (CFT) circular steel columns under the combined effects of axial and cyclic lateral loads is costly and challenging. Therefore, this study provides a nonlinear finite element analysis (NLFEA) of fourteen models for thermal shock damaged CFT circular steel columns wrapped with various layers of carbon fiber reinforced polymer (CFRP) composites at its end region, which represents the critical location in terms of the lateral load capacity. Firstly, the column axial load was applied as the first loading step, and then the horizontal load was applied at the top of the column as displacement-controlled loading to guarantee the descending part of the load-displacement behavior. The intent is to confine the column end to avoid outward local buckling of the CFT column and thus developing high strength, larger net drift and more energy dissipation. The NLFEA models were properly calibrated and validated with reputable experimental results, followed by conducting a parametric study to assess the influence of the number of CFRP layers and the impact of thermal shock on the CFT circular steel column performance. For the modeled CFT circular steel column, the use of five to ten layers of CFRP composites resulted in a significant performance enhancement. However, the performance enhancements using 9 and 10 CFRP layers were comparable with 8 CFRP layers. In addition, it was found that the column axial load level significantly affects the CFT circular steel column behavior under lateral loading; better behavior as the axial load level increased. Strengthening of any CFT circular steel column must be optimized through proper NLFEA modeling and the findings of this study represent useful guidelines and methodology for the similar strengthening of CFT steel columns damaged by thermal shock.

Document access rights

Network User group Action
ILC SPbPU Local Network All Read Print Download
-> Internet All Read Print Download

Table of Contents

  • Behavior of CFT steel columns damaged by thermal shock
    • 1. Introduction
    • 2. Methods
      • 2.1. Experimental Work Review
      • 2.2. Description of NLFEA Program
      • 2.2.1. Description of Non-linear Finite Element Analysis (NLFEA)
      • 2.2.2. Investigated Parameters
      • 2.2.3. Validation Process
    • 3. Results and Discussion
      • 3.1. Horizontal load-displacement hysteretic loops
      • 3.2. Lateral Load and Net Drift Capacities
      • 3.3. Horizontal displacement-steel strain responses
      • 3.4. Horizontal displacement-CFRP strain responses
      • 3.5. Stiffness degradation
      • 3.6. Performance Enhancement Factor and Energy Dissipation
      • 3.7. Comparison of NLFEA with other results
    • 4. Conclusions

Usage statistics

stat Access count: 100
Last 30 days: 2
Detailed usage statistics