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.
关键词
大直径变截面桩/振动台试验/震陷场地/动力响应
Key words
large diameter variable section piles/shaker test/collapse site/dynamic response
维普
万方数据