Dynamic model establishment and response analysis of frame anchors supporting structure

Abstract

Abstract: In order to analyze the dynamic response of frame anchors supporting structure under seismic effect, a mid span column element was taken as the object, and the dynamic earth pressure was analyzed by considering the amplification effect of slope acceleration. Then the column was simplified as a vertical member with uniform bending stiffness. According to the working mechanism of the anchor rod, the free section was simplified as a line spring, and the anchor section was simplified as a line spring and a Newton viscous pot under the consideration of the influence of soil damping. The slope foot of the support structure was simplified as a fixed end constraint, then the simplified dynamic response model of supporting structure was established. The dynamic response of the supporting structure was solved by the force method and graph multiplication method, and the relationship between the dynamic bending moment as well as dynamic displacement of the supporting structure and the slope height was established. The alogorithm was compared with the result of Geo-Studio finite element software to verify the rationality and feasibility of the model, which can provide corresponding reference for such engineering design and dynamic research of supporting structure under earthquake.

Key words: seismic effect, dynamic model, dynamic response, upright column

CLC Number:

TU443

YE Shuai-hua, FENG Wen-gang, LI Jing-bang, TAO Hui. Dynamic model establishment and response analysis of frame anchors supporting structure[J]. Journal of Lanzhou University of Technology, 2024, 50(1): 116-122.

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