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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Journal of Civil Engineering Civil Engineering Dimension
Heppy Kristijanto
Institut Teknologi Sepuluh Nopember, Surabaya
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Damage Detection in Gusset Plates of Steel Truss Bridges using Modal Parameters: Experimental and Numerical Study Kristijanto, Heppy; Fitriyah, Dita Kamarul; Habieb, Ahmad Basshofi
Civil Engineering Dimension Vol. 27 No. 2 (2025): SEPTEMBER 2025
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.27.2.225-238

Abstract

Corrosion in gusset plate elements has become a critical factor in bridge structural failures, emphasizing the need for more accurate and reliable damage detection methods. Conventional visual inspections are limited in precision and cannot provide real-time monitoring, underscoring the importance of advanced techniques. This study proposes a vibration-based Structural Health Monitoring (SHM) approach employing modal parameter indices, namely Mode Shape (MS), Mode Shape Curvature (MSC), Mode Shape Slope (MSS), and Mode Shape Curvature Square (MSCS), to detect damage in bridge components. Damage scenarios were simulated by introducing gusset plate cuts of 5%, 10%, and 20% to represent different levels of corrosion. The results indicate that MSC and MSCS are the most reliable methods for identifying damage locations in complex structural systems, as they capture mode shape alterations with high sensitivity. Furthermore, the accuracy of modal parameter analysis improves with increasing damage severity. These findings confirm MSC and MSCS as robust tools for early-stage corrosion detection in SHM applications.
Optimasi Kinerja Seismik Sambungan Struktur untuk Aplikasi Rekayasa Teknik Sipil Suswanto, Budi; Casita, Cintantya Budi; Chiu, Chien-Kuo; Triwulan, Triwulan; Masiran, Hidayat Soegihardjo; Kristijanto, Heppy; Iranata, Data
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 2, DESEMBER 2025 (IN PROGRESS)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i2.68632

Abstract

This study evaluates the seismic performance of steel moment-resisting frames through the integration of reduced beam sections (RBS) with externally reinforced cover plates. Three-dimensional finite element analyses under cyclic loading were conducted to assess the influence of cover plates on different RBS geometries, including radius cut (RBSCP-RC), straight cut (RBSCP-SC), tapered cut (RBSCP-TC), and drilled flange (RBSCP-DF). The objective of this study is to investigate the effects of geometric variation on seismic response, moment capacity, and ductility of hybrid RBS–cover plate (RBSCP) connections. The novelty of this research lies in the systematic development and evaluation of a hybrid RBS–cover plate connection that combines the energy dissipation capability of RBS with the strengthening function of cover plates. This configuration is intended to shift plastic hinge formation away from the column face, reduce the risk of premature weld failure, and improve connection strength and energy dissipation. The numerical results indicate that the incorporation of cover plates significantly enhances the seismic performance of RBS connections, with the radius-cut configuration demonstrating the most stable hysteretic behavior and the highest energy dissipation capacity. These findings emphasize the importance of geometric optimization in hybrid RBS–cover plate designs and provide valuable guidance for improving the seismic resilience of steel moment-resisting frames.
Finite element modeling of square confined concrete columns with stainless steel and carbon steel under concentric load Samalloa, Venesia S; Piscesa, Bambang; Kristijanto, Heppy
Journal of Civil Engineering Vol. 41 No. 1 (2026)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25799029.v41i1.9508

Abstract

The use of conventional carbon steel in steel tube confined concrete (STCC) structures presents durability challenges, particularly in marine environments, due to corrosion susceptibility and high maintenance requirements. Stainless steel tube confined concrete (SSTCC) offers enhanced corrosion resistance and improved long-term performance compared to carbon steel tube confined concrete (CSTCC). This study aims to validate numerical simulations against experimental results by evaluating load–displacement and stress–strain responses, while considering the effects of surface contact sensitivity between the concrete core and steel tube, as well as initial imperfections within the shear band region. A three-dimensional nonlinear finite element analysis (3D-NLFEA) model was developed for square cross-section STCC columns. The numerical results demonstrate strong agreement with experimental data. The comparison of load–displacement curves shows an average discrepancy of 3.22%, while the stress–strain responses exhibit an average difference of 5.00%. Improved correlation was achieved by incorporating a 10% material reduction to represent initial imperfections in the shear band region and calibrated surface contact parameters, including a cohesive strength of 0.7 MPa, a uniaxial tensile strength of 1.0 MPa, and an internal friction angle of 15°. These findings confirm the capability of the proposed numerical model to accurately predict the structural behavior of square STCC columns and highlight the effectiveness of stainless steel confinement in enhancing structural performance.
Co-Authors Bambang Piscesa Budi Suswanto Chiu, Chien-Kuo Data Iranata Dita Kamarul Fitriyah Habieb, Ahmad Basshofi Masiran, Hidayat Soegihardjo Samalloa, Venesia S Triwulan Triwulan