The following Enhancements have been implemented for CSiBridge 2015 v17.0.0: - The responsiveness of the user interface has been improved. - The DirectX graphics functionality has been enhanced. - A friction-spring hysteretic damper has been implemented as a new link property. The force-displacement relationship exhibits linear slipping stiffness when loading, but unloads with a smaller slipping stiffness. A pre-compression displacement and a displacement stop-limit may be specified. - A bilinear Maxwell damper has been implemented as a new link property. This device is a linear spring in series with a dashpot whose force-velocity relationship exhibits bilinear viscous behavior, typical of certain oil dampers having a relief valve. - Improved convergence behavior and increased speed for nonlinear static and direct-integration time-history analysis. - Increased speed of moving load analysis by parallelization. - Superstructure design checking has been extended to include composite bridge superstructures with steel U-girders according to the Canadian CAN/CSA-S6-06 code. - Superstructure design checking has been extended to include composite bridge superstructures with steel U-girders according to the Indian IRC-2011 code. - Superstructure design checking has been implemented for concrete superstructure sections according to the Russian SNiP 2.05.03-84 code. Superstructure types supported include prestressed concrete box girders and composite sections with precast I-girders and U-girders. - Superstructure design reports have been enhanced to include step-by-step detailed output, including equations and code references. These are currently available for AASHTO LRFD 2007 and 2012, for multi-cell concrete box shear and flexure checks and precast composite I-beam shear and flexure checks. - A traditional menu has been added as an alternative to the ribbon. Users can switch between the two options. - The ribbon style has been updated to be similar to current Microsoft applications. - Other minor enhancements.