As a freelance micro-consultancy specializing in structural forensics, we investigate bridge failures and claims – during design, construction, and operations. And we provide subject-matter expert services to bridge owners, designers, constructors, suppliers of components and construction machines, legal counsels, and insurance carriers.
We also offer knowledge and learning for the bridge community. Dr. Rosignoli’s books are published worldwide and cited in dozens of publications and bridge design standards. His researches, lectures and training courses are followed by tens of thousands of bridge professionals. Bridge Design & Construction, his LinkedIn forum, enjoys the participation of 16.000+ bridge engineers from every corner of the world.

Unique Credentials
Decades of experience in the design, construction, and forensic engineering of complex bridges and bridge construction machines. Unique professional stature within the bridge community. Extreme familiarity with software programs for structural analysis and failure simulation. Long-term familiarity with working with legal counsels.



Investigating Failure
We investigate failure. Bridges, bridge construction machines, and their interactions. We analyze design, construction, and operation flaws. We determine causes, identify remediation methods, assure proper remediation, educate legal counsels and arbitrators, and provide advice, testimony, or both.
Solid Modeling
Investigating cracking and loco-regional distress often requires solid numerical models and isoparametric finite-elements.
Intricacies
Modeling varying-geometry mechanical systems such as tower cranes, self-launching gantries and movable scaffolding systems may require thousands of finite-elements, nodal eccentricities, and frictional articulations.
Nonlinearities
Staged construction, time-dependent stress redistribution, corrosion-induced section losses, and nonlinear local effects may adversely affect stability of equilibrium and fatigue life.
Flexibility
Cable-supported bridges and bridge construction machines may be prone to P-delta effects, vibrations, multiple forms of instability, and aeroelastic effects.
Multi-Physics
Our published research ranges from aggressivity functions for resonance analysis of high-speed railway bridges to seismic dissipators featuring stabilized cyclic shear yielding.
Unique Expertise
Our familiarity with long-span bridges, wind-tunnel testing and aeroelasticity? Seven cable-supported bridges in North America, 7 in Europe, 1 in Asia, 1 in Central America, and 1 in Africa. And of course, many super-flexible bridge construction machines.

Books
Dr. Rosignoli’s books are distributed worldwide. Launched Bridges (1998, ASCE Press), Bridge Launching (2002, Thomas Telford) with its 2nd edition (2014, ICE Publishing), and the bestseller Bridge Construction Equipment (2013, ICE Publishing) are international references, cited in dozens of publications and bridge design standards. Chapter 6.37.40 Bridge Erection Machines in the UNESCO Encyclopedia of Life Support Systems (2013, UNESCO) is also available worldwide.

eManuals
Dr. Rosignoli’s 16 eManuals of modern bridge design and construction technology can be downloaded from this website (PDF version) or from Amazon (Kindle version). In a couple of years, bridge professionals have downloaded eManuals from well over 50 countries.
Training Courses
The courses of modern bridge design and construction technology that Dr. Rosignoli teaches for the ASCE Continuing Education Program and on-demand in the offices of bridge owners, designers and constructors deliver state-of-the-art knowledge and learning for bridge professionals.
Blog
Enjoy our rich collection of free publications, discussions, and commentaries. You are very welcome.