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DAMPER DESIGN
SIMPLIFIED
Our new Taylor Damped Moment FrameTM (TDMFTM) procedure simplifies the design process for new buildings by eliminating the need for nonlinear time-history analysis and peer review. This more prescriptive approach decouples special steel moment frame design from the damper frame, allowing for easier analytical models and improved coordination with Taylor Devices.
Moment Frames designed using Modal Response Spectrum Analysis with modifications:
R = 8; Cd = 4.5 (instead of 5.5); 25% reduction in base shear when scaling for strength design
Diagonal, Chevron and Horizontal Damper Configurations Permitted
Dampers may be located within or outside of moment frames:
The TDMF procedure results in reduced steel tonnage, up to 35% in the Moment Frame compared to undamped moment frame systems
Dampers do not have to stack vertically - they can be shifted to different bays (in elevation and plan) from floor to floor to accommodate programming needs and reduce accumulated forces in columns
Reduced base shear and overturning moments results in smaller foundations
The TDMF procedure requires a minimum of 2 dampers per floor in each principal direction
Compliant with 2021 & 2018 IBC, including LADBS, OSHPD and DSA modifications
Better Resiliency: Code-compliant buildings designed with the TDMF™ procedure have inherently better seismic resiliency. Reduced story drifts and accelerations result in significantly reduced downtime compared to equivalent buildings with other structural systems
The TDMF design procedure is compatible with all pre-approved and proprietary moment frame connections
Damper Properties are determined through a prescriptive approach. The damping constant, C, is easily determined for each damper. The velocity exponent, alpha, is fixed at 0.4. The process is easily implementable into spreadsheets
This procedure has been evaluated by ICC-ES through the rigorous AC494 procedure, including validation with over 100 archetype structures using the FEMA P-695 methodology.
