Torsional shear bolts in pre-stressed concrete applications
Pre-stressed concrete (PSC) is a high-performance structural system widely used in bridges, railway sleepers, precast girders, parking structures, and long-span buildings. By introducing compressive stress into concrete before service loads are applied, PSC effectively mitigates tensile cracking, improves load capacity, and enhances durability. While tendons (pre-tensioning or post-tensioning systems) are the primary force-generating elements, connection systems and auxiliary fastening components play a critical supporting role in ensuring overall structural safety. In this context, torsional shear bolts are increasingly used in PSC-related assemblies—particularly in steel-to-concrete interfaces, anchorage hardware, segmental connections, and auxiliary structural systems. This article explores how torsional shear bolts function within pre-stressed concrete applications, focusing on engineering principles, performance benefits, and practical selection considerations. 1. Where Torsi...