Dynamic response characteristics of large diameter variable section single pile under the coupling action of pile-splinter soil layer
In order to investigate the dynamic response law of concrete-filled steel tubular composite single pile with large diameter and variable section under different types of seismic waves,5010 wave,1004 wave,Kobe wave and El-Centro wave with ground motion intensity of 0.15g were selected through indoor shaking table test relying on Xiangan Bridge project of Xiamen Second East Passage.The pile acceleration,horizontal displacement,bending moment and pile foundation damage of large diameter variable section concrete filled steel tube composite pile are studied.The test results show that the dynamic response characteristics of large diameter variable section concrete filled steel tube composite pile are different due to the different spectral characteristics of different seismic waves.Pile top acceleration maximum,pile top horizontal displacement maximum and pile bending moment maximum are the maximum under 1004 wave,and the minimum under Kobe wave.The maximum bending moment of pile body did not exceed the designed flexural bearing capacity of pile foundation.In the design of flexural bearing capacity of pile foundation under the action of earthquake force,the design of flexural bearing capacity at the interface of soft and hard soil layer is emphasized.
large diameter variable section pilesshaker testcollapse sitedynamic response
万方数据
维普
