Shaking Table Test of High Pier and Small Radius Curved Bridge under Multi‐point Excitation

Abstract

The non-uniform stratum and uneven surface have the complicated seismic spatial variability. The seismic response of high pier and small radius curved bridge caused by the seismic specificity of this kind of terrain has not been systematically studied. According to the multi-point excitation theory of long-span structures and the similar theory of shaking table test in model structures, a high pier with small radius curved girder bridge was used as the research object. The shaking table test of real bridge model was carried out to study the seismic response laws of this kind of bridge under multi-point excitation. The results show that the designed seismic wave expansion device can meet the test requirements. The frequency of the model structure decreases rapidly and the damping ratio increases during the whole test process. The local terrain effect amplifies the seismic response of high pier and small radius curved bridge. The seismic response of high pier and small radius curved bridge is affected by different frequency spectrum seismic waves, and there is a big difference. Based on the above results, the impact of multi-point excitation should be considered in seismic design of high pier with small radius curved bridge.

Shaking Table Tests on Wrap Rope Connect Device for Continuous‐Beam Bridges with Different Pier Heights

“…e most common seismic design method of continuous-girder bridges is to set multiple seismic isolation bearings. Many studies have been conducted on damping measures, such as damping isolation bearings and viscous dampers for continuous-girder bridges, and many research results have been achieved [1][2][3]. However, regardless of the type of isolation bearings adopted, a large relative displacement must be applied to accomplish the ideal damping e ect [4,5].…”

Advanced Concrete Technology and Its Structural Applications

“…L. Yan et al [38] carried out the shaking table test on a real bridge model to study the seismic response laws of this kind of bridge under multipoint excitation. e results show that the seismic response of high pier and small-radius curved bridge is affected by different frequency-spectrum seismic waves and the local terrain effect amplifies its seismic response.…”