Study on Dynamic Response of Pressure Type Anchor and Lattice Beam System Under Seismic Loadings

Abstract

In order to investigate dynamic response of anchoring landslide under seismic loadings with different loading magnitudes, a large scale shaking table model test was carried out, and the acceleration response of anchoring landslide, mechanical characteristics of anchors and lattice beams were studied respectively. The test results indicate that (1) under lower loading magnitude 0.05–0.2 g, the PGA amplification factors of different soil layers in landslide, and the dynamic response in different layers of anchors and lattice beams all have little differences. (2) Under 0.2–0.4 g, the PGA amplification factors of different soil layers and the anchoring force of different layers of anchors continue to increase. The strain of the top anchors and the bending strains of the top crossbeams are slightly greater than that in other layers. (3) Under high loading magnitude 0.4–0.6 g, the strain of the upper anchors continues to increase and it is much greater than that in other layers, and the bending strain of the top crossbeam increases sharply and generates obvious tension-bend deformation.