Parametric analysis of transmission lines embedded in steel–concrete composite structures: A computational study

Dongsoo Lee , Jong-Sub Lee , Younghoon Lee , Thomas H.-K. Kang , Jung-Doung Yu

Abstract

This paper presents a parametric analysis of a two-conductor transmission line embedded in steel–concrete composite structures. The line configuration consists of a steel rebar and PVC-insulated copper wire, with spacing varied from near-contact (14.35 mm) to 3 m. The resistance, inductance, capacitance, conductance, and characteristic impedance of the transmission line are modeled considering skin effect, proximity effect, and frequency. The results show that resistance and conductance are strongly affected by both frequency and conductor spacing, whereas inductance and capacitance are primarily governed by geometry. Characteristic impedance exhibits a combined dependence on spacing and frequency, with significant increases observed at wide spacings and high frequencies. These findings provide valuable insights into the electromagnetic behavior of embedded transmission lines, with implications for structural health monitoring of steel–concrete composite structures.

Key Words

characteristic impedance; frequency-dependent RLGC; skin and proximity effects; steel–concrete composite; transmission line

Address

Dongsoo Lee — Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, 205 North Mathews, Urbana, IL 61801, USA
Jong-Sub Lee — School of Civil, Environmental and Architectural Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
Younghoon Lee — School of Civil, Environmental and Architectural Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
Thomas H.-K. Kang — Department of Architecture & Architectural Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
Jung-Doung Yu — Department of Civil Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, Republic of Korea

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