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Vibration Control of Bridge with Vehicle Loads

This study proposes an appropriate passive control device for vibration control of bridges under vehicle loads. The proposed device can reduce both displacement and acceleration simultaneously, while also decaying steady-state responses quickly.

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Vibration Control of Bridge with Vehicle Loads

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  1. 2002년도 대한토목학회 학술발표회 B3, P1-043 VIBRATION CONTROL OF A BRIDGE WITH VEHICLE LOADS Jun-Sik Ha1), Ji-Seong Jo2), Sun-Kyu Park3), In-Won Lee4) 1) Graduate Student, Department of Civil and Environmental Engineering, KAIST 2) Ph.D. Candidate, Department of Civil and Environmental Engineering, KAIST 3) Professor, Department of Civil Engineering, SungKyunKwan Univ. 4) Professor, Department of Civil and Environmental Engineering, KAIST

  2. INTRODUCTION  Bridges, which have lightweight, are more vulnerable to heavy weight vehicle.  The vibration induced by vehicle loads makes passengers uncomfortable. Propose appropriate passive control device for vibration control of bridges.

  3. Longitudinal Section Cross Section FORMULATION OF MATHEMATICAL MODEL  Modeling (1) (2) Schematics of the bridge equipped with proposed passive control device

  4. (3)  Multiplying eq.(1) by (3) Applying orthogonal condition (4) (5) (6)

  5. (7) (8) (9) Optimization of Device Parameters (10) When J is minimized, the damping coefficient and spring constant in the control device are optimized.

  6. Numerical Example Composite Steel Plate Girder Bridge “Generalized of Design for Short Span Steel Bridges Using Rolled Beam”, Magazine of the Korean Society of Steel Construction, vol.14, No.1, pp. 77~82.  Geometry and Material Properties  Bridge  Control Device Schematics of the bridge

  7. Displacement of Mid-span Acceleration of Mid-span Optimal Damping Coefficient and Spring Constant Simulation Results

  8. Conclusions •  Proposed Passive Control Device • - can reduce both displacement and acceleration • simultaneously. • - can decay the steady-state responses fast. • Proposed passive control device could be effectively used for vibration control of bridges under vehicle loads.

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