Influence of metallic grid and fiber reinforced concrete strengthening on the shielding and impact resistance of concrete walls

Tian Feng Yuan, Jin Seok Choi, Young Hwi Kim, Young Soo Yoon

Research output: Contribution to journalArticlepeer-review

Abstract

In modern society, an ever-increasing emphasis is placed on structural safety design that not only considers external loading but extends to reduced electromagnetic interference. Generally, studies only consider shielding effectiveness of strengthening method or materials, and few studies have considered the relationship between damaged areas and shielding effectiveness. Therefore, the influence of metallic grid parameters and fiber reinforced concrete (HSDC) on shielding effectiveness with and without impact loading are studied in this research. Concrete wall strengthening with four types of metallic grid and three thickness types of HSDC were considered. Moreover, the relationship between damaged area ratio and shielding effectiveness was evaluated utilizing the low-velocity drop-weight impact test. In specimens with metallic grid or HSDC, shielding effectiveness with strengthening layer (13.4–64.1%) or thickness (35.6–46.2%) increase and grid size (> 7.8%) decreased. Specimen strengthened by smaller than 55.1% and 101% of the free space area ratio of single and double layer, respectively, exhibit more than 40 dB shielding effectiveness. For the specimen strengthened with HSDC, shielding effectiveness increased with strengthening area, except smaller than 6%. The smallest metallic grid and the thickest HSDC strengthening specimen exhibited improved impact resistance and great shielding effectiveness after impact loading.

Original languageEnglish
Article number109
JournalArchives of Civil and Mechanical Engineering
Volume22
Issue number3
DOIs
Publication statusPublished - 2022 Aug

Keywords

  • Damage area ratio
  • Electromagnetic shielding
  • High-strength high ductility concrete
  • Impact resistance
  • Metallic grid
  • Strengthening

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Influence of metallic grid and fiber reinforced concrete strengthening on the shielding and impact resistance of concrete walls'. Together they form a unique fingerprint.

Cite this