Dynamic Characteristics of the Long Span Truss-Type Lift Gate by Model Test

Abstract

An experimental study of model truss-type vertical gate consisting of a truss and a plate was presented in this paper to examine the structural dynamics of the gates. A 1:61 scale model was constructed for the 95 m prototype gate using an acrylic truss and an acrylonitrile butadiene styrene plate. The scaled model was tested in a 1.6 m wide concrete flume for two orientations to determine the effects of gate orientation on structural vibrations. Natural frequencies of the model gate was measured and calibrated with FEM predictions. Vertical vibrations were measured under various operational conditions, including a range of bottom opening heights and different upstream and downstream water levels. The gate model with reverse direction was preferred due to its low overall vibrational response and flow level combinations. The test results also provide a basic dataset for development of operations guidelines that minimize flow-induced vibrations of the gates.

Dynamic Characteristics of Truss-Type Lift Gate According to Installation Direction

“…본 연구에서는 탄성계수의 비가 강재의 (75/31) 더 커야 한다 [3] . [2] 본 수문이 설치된 지구는 중앙부에 95m, 양측에 각 1 조의 47.5 m의 게이트가 설치된다. 95m 수문은 축척 1/61로 실험되어 연구되었다 [2] .…”