Publications
A Study on UNESCO’s World Heritage Rail Tourism in the Nilgiris Hills
UNESCO World Heritage Site status has significantly boosted rail tourism on the Nilgiri Mountain Railway (NMR), known as the 'Blue Mountains,' by integrating its rich architectural, cultural, and tribal heritage into global heritage tourism narratives. This study identifies key motivating factors driving tourist interest in the NMR through advanced statistical analysis, including Student t-test, One-way ANOVA, Chi-square test, Pearson Correlations, and Factor Analysis. The findings highlight how the NMR's unique blend of history and scenic beauty attracts visitors to the 'Queen of the Hills' in the Nilgiris district, contributing to its momentum as a premier heritage rail tourism destination.
Kalka Shimla Railways – A UNESCO World Heritage Site Exposed to Landslides
A significant portion of the Kalka Shimla Railway, a UNESCO World Heritage Site renowned for its steep ascent and historical significance, is exposed to high or very high susceptibility to landslides. The study reveals that 36.9% of the railway's total length faces severe landslide risk, with 96.55% of past landslides concentrated in just 5.62% of the area classified as 'Very High' susceptibility. This finding underscores the urgent need for targeted protection measures to preserve this heritage site. The research employed a Random Forest classifier trained on 1,484 historical landslide locations, validated with high accuracy (90.6% during training and 91.7% during testing) and robust AUROC values of 0.97. Bayesian hyperparameter optimization ensured the model's precision, while Jenks optimization further refined susceptibility zonation mapping.
Present day status and numerical modelling of heritage masonry bridges of Kalka-Shimla Mountain Railways
Heritage masonry bridges on the UNESCO-listed Kalka-Shimla Mountain Railways, constructed in 1905, exhibit measurable material degradation and seismic vulnerabilities. A study combining ambient vibration testing (AVT) with operational modal analysis (OMA) revealed discrepancies between field-measured modal parameters and initial numerical models, indicating structural changes likely due to aging or environmental factors. By refining these models through trial-and-error modal updation, researchers achieved a reliable representation of the bridges' current condition, providing critical insights for conservation efforts in seismic zone IV. This approach offers a novel method for assessing heritage structures without invasive testing.
Seismic Vulnerability Assessment of Multi-arch Gallery Masonry Bridges Adopting Different Seismic Analysis Procedures
Incremental dynamic analysis provides more significant seismic performance insights for heritage masonry bridges compared to nonlinear static analysis, though at greater computational cost. This study assessed the seismic vulnerability of two multi-arch gallery bridges from India's UNESCO-listed Kalka-Shimla Mountain Railway using advanced modeling and analysis techniques. Three-dimensional finite element models were developed in ABAQUS, employing macro-modeling and concrete damage plasticity for stone masonry. Nonlinear static analysis with two lateral loading patterns and incremental dynamic analysis using 30 site-specific accelerograms revealed critical control node displacements and tensile damage locations. While both methods identified vulnerabilities, incremental dynamic analysis proved more effective despite its higher computational demands.
Serviceability analysis and increased axle load performance of heritage arch gallery railway bridge
A heritage arch gallery railway bridge, part of the UNESCO-listed Kalka Shimla Mountain Railways, can sustain train speeds up to 40 km/h under current axle loading conditions. This finding emerges from a serviceability analysis and performance assessment conducted using finite element modeling (FE) and modal analysis techniques. Researchers developed an FE model based on available engineering drawings and reports, then refined it using data from ambient vibration tests (AVT) and operational modal analysis (OMA). The updated model allowed for the evaluation of the bridge's structural response to present-day axle loads and speeds, as well as the feasibility of increased speeds and higher axle loads. The study concluded that Bridge No. 541 meets serviceability conditions advised by both Indian Railways and international codes, providing critical insights for the preservation and operation of this historic railway infrastructure.
Strangers on a Train
A 2014 study highlights the significant role of India's Mountain Railways, particularly the Kalka Shimla Railway, as vital transportation infrastructure and cultural heritage. Declared a UNESCO World Heritage Site in 2008, this narrow-gauge railway offers a unique perspective on India's Himalayan landscapes, connecting Shimla to the rest of the nation through 102 tunnels over 96 kilometers. The study emphasizes its practical utility as an alternative to private transportation in populous India, while also noting its cultural and historical significance, including its colonial heritage. A group of students from Fayetteville State University experienced firsthand the railway's scenic beauty, temperature variations, and engineering complexity, providing insights into its importance for both locals and tourists.
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