Mechanical Analysis of Composite Girder Cable-Stayed Bridges during Construction

This open access book presents a comprehensive analysis and control theory for the entire construction process of large-span steel-concrete composite beam cable-stayed bridges, aiming to resolve complex stress challenges arising from shear lag effects in wide composite girders, multiple load couplings, and structural system transitions.

Its core theme is establishing high-precision theoretical analysis models to reveal the true mechanical behavior of such bridges during construction. Specifically, the book delves into critical issues, including multi-effect coupling (compression-bending, torsion, sliding, etc.), shear lag effects, time-varying internal forces, linear changes in main structures (girders, towers, cables), concrete shrinkage-creep, and seismic response. These topics are crucial because traditional simplified theories fail to adequately account for the combined impact of these factors, potentially creating blind spots in safety control during construction. By proposing a finite beam segment element with 14 degrees of freedom per node, deriving explicit matrices and practical formulas, and integrating real-bridge testing, this book systematically resolves the challenges of accurately predicting cable forces, stress distributions, and linear changes—problems traditionally difficult to address precisely. It aims to provide clear conceptual and practical theoretical guidance for critical construction phases such as maximum double cantilever, closure, and bridge completion.

This book is suitable for graduate students, civil engineering scholars, and bridge engineering designers for reading and reference.