SCLR Cable-Stayed Bridge
Mumbai, India

Owner

Mumbai Metropolitan Region Development Authority (MMRDA)

Contractor

J. Kumar Infraprojects Limited

Engineering

SPECTRUM Techno Consultants Pvt Ltd

The SCLR Cable-Stayed Bridge is a two-lane ramp designed to streamline traffic movement over the Western Express Highway, featuring a 90 degree deviation angle with a 100 m radius of curvature.

Given the complex alignment, the bridge’s Y-shaped pylon was conceptualized to address space constraints and optimize load distribution while ensuring structural efficiency. The connection between the pylon and the superstructure is a unique engineering achievement, developed after overcoming multiple design challenges.

The analytical model was developed in SOFiSTiK software, with the following key aspects:

Superstructure modeling: The 2.75 m deep longitudinal box girders were modeled as beam elements with an axis-based approach. Stay cables were modelled as cable elements. The pylon, piles and tie beams were modeled as beam elements to ensure accurate structural representation.
Construction stage analysis: Conducted by simulating the activation and deactivation of loads and elements according to the designed construction sequence, ensuring stability at each phase.
Finite Element Analysis: FEA analysis for transverse analysis and design of anchorage zones, including material and geometric non-linearity, were performed using advanced solver tools available with SOFiSTiK.

This innovative bridge not only enhances connectivity but also showcases advanced engineering and analytical techniques in cable-stayed design.

The combination of complex geometry, rigorous analysis, and staged construction modeling ensures long-term stability and efficiency, making it a landmark structure in Mumbai’s infrastructure network.

Salient features:

Span arrangement: 58.24 m + 105.00 m + 51.76 m
Curvature in plan: 100 m (radius)
Superstructure: Steel composite box girder with cast in-situ deck slab
Deck width: 10.5 m wide to accommodate a 2-lane carriageway of 7.5 m width
Type of pylon: RCC "Y" shaped pylon with two planes of stay cables
Stay cable: Nominal dia 15.7 mm, C/s area 150 mm², saddle at pylon, anchorage at deck level