Bridge Software Institute FB-MultiPier v5.3 BSI is headquartered at the University of Florida. The faculty, staff, and students on our team are uniquely positioned to draw from a combination of academic, government, and industry resources. In turn, our goals include enhancement, maintenance, and dissemination of bridge software to address the increasing demands placed on infrastructure systems. We are dedicated to solving the next generation of large-scale bridge engineering problems through the development of geo-structural software. Feature Description Updated Interface The User Interface (UI) has been updated to more closely adhere to Microsoft(R) User Experience (UX) design guidelines. These updates include use of enlarged icons, use of a standardized font program-wide, updated form stylings, and anti-aliased graphics. Multiple Pier Modeling Unique Piers Each pier in a multi-pier model can be unique, including pier type (general pier or pile bent), soil model, elevations, member properties, skew angle, and bearings. The 2D Bridge window shows the bridge layout in plan and the 3D Bridge window shows the 3D visualization of the bridge. Pier Rotation Each pier can be rotated about the vertical (Z) axis. This facilitates modeling skew bridges and radial piers on curved alignments. Bridge Superstructure The bridge superstructure is incorporated into the model using an equivalent beam that connects the centerline of two piers. The span can have variable cross section properties. The bearing connections at the pier supports can be released, pinned, roller, integral or user-defined using a custom load-displacement curve. Two Rows of Bearing Locations Two independent lines of bearings accommodate the transfer of load from the bridge superstructure to the piers. Unique distributions of bearings can be defined and spaced along each row. In addition, because the bearings are offset from the center of the pier cap, any pier cap torque induced from unequal spans is automatically taken into account. Wind Load Generator Generate wind loads for the entire bridge model at once. Dynamic Analysis Time Step Integration Time history load functions and ground acceleration records can be applied to the model. Different time step integration methods are available as well as a variety of analysis control parameters. Concentrated masses and dampers can be added to the model to simulate added mass and energy dissipation effects. Modal Analysis The modal analysis option performs a frequency analysis of the model. Both frequencies and mode shapes are provided as output results. Dynamic Soil Modeling Soil gap modeling is available to model energy dissipation due to hysteretic damping. Cyclic degradation parameters are also available to modify the lateral soil response during dynamic loading. Animated Results The 3D model displacement results can be animated for a time step integration analysis. Animation results can be played and paused and a slider bar is provided for selectively viewing individual time step results.