CAJ | 학술논문

基于 Biot 提出的饱和多孔介质的波动方程，研究了均质各向同性饱和土中端承管桩的扭转振动问题。首先对土层动力平衡方程进行求解并得到土体扭转振动位移形式解，然后对管桩的动力平衡方程进行求解，得到了管桩桩顶转角解析解，进一步通过数值算例分析了桩周土与桩芯土的物理力学参数对管桩桩顶复刚度和桩身转角的影响。数值分析结果表明，在动力基础设计所关注的低频段，桩周土与桩芯土的剪切模量比、壁厚以及桩的长径比对管桩的动力响应有较大的影响，而液固耦合系数的影响很小。
기우 Biot 제출적포화다공개질적파동방정，연구료균질각향동성포화토중단승관장적뉴전진동문제。수선대토층동력평형방정진행구해병득도토체뉴전진동위이형식해，연후대관장적동력평형방정진행구해，득도료관장장정전각해석해，진일보통과수치산례분석료장주토여장심토적물리역학삼수대관장장정복강도화장신전각적영향。수치분석결과표명，재동력기출설계소관주적저빈단，장주토여장심토적전절모량비、벽후이급장적장경비대관장적동력향응유교대적영향，이액고우합계수적영향흔소。
Based on Biot's dynamic wave equation for porous-saturated soil,torsional vibration of an end-supported pipe pile embedded in homogeneously isotropic saturated soil and subjected to a transient torsional loading was theoretically investigated.Firstly,the torsional vibration displacement form solution of the saturated soil was solved with the dynamic equations of soil layer.Then,by utilizing the continuity and boundary conditions of the pile-soil system and solving the dynamic equation of the pipe pile,the dynamic response of the twist angle of the pipe pile was obtained in a closed form.Finally,the influences of major soil parameters on the complex stiffness of the pile top and the twist angle of the pipe pile were analyzed.It was shown that in the low-frequency range focused by dynamic foundation design,the modulus ratio of soil around pile to inner soil,the thickness and the slenderness of pipe pile have distinct influences on the dynamic response of the pile;but the influence of the liquid-soild coupled coefficient can be neglected.