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91. COUPLED TRUSS WALLS WITH DAMPED LINK ELEMENTS

A new structural concept is proposed for the seismic design of tall buildings. This system combines the inherent stiffness and strength of a conventional truss system with the energy absorption characteristic of supplemental damping elements. The damping elements are strategically placed to form the linking elements of a coupled vertical truss system. While the force resistance system of the truss wall is in parallel, the damped link beam is in series with the component of the truss stiffness contributed to the coupled wall action. A series of time history dynamic studies gauged the performance of the proposed concept and found the proposed damped link concept superior in performance compared to the conventional approach.

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2. Bridge Design

This paper reports on a non-linear analysis of a bridge supported on sliding bearings with elastomeric restoring spring and viscous dampers. Results were verified with shake table tests.

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Case Study

10. INVESTIGATION OF LIGHT POLE BASE INTEGRITY – RICH STADIUM

Light poles at Rich Stadium in Orchard Park, N.Y., were showing incipient failure of their hold-down bolts, due to wind excitation. This paper describes the measures used to alleviate this problem, including the addition of viscous dampers between the stadium structure and a point around one third up on the light poles.

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