岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2014年
5期
1348-1356
,共9页
饱和土%管桩%水平振动%动力阻抗%剪切模量
飽和土%管樁%水平振動%動力阻抗%剪切模量
포화토%관장%수평진동%동력조항%전절모량
saturated soil%pipe pile%lateral vibration%dynamic impedance%shear modulus
为了考察桩、土主要参数对饱和土中管桩水平振动的影响，将土体分为桩周饱和土和桩芯饱和土两部分，利用多孔介质理论的饱和土控制方程建立了饱和土-管桩的耦合振动模型。在考虑桩周饱和土和桩芯饱和土边界条件的情况下，运用势函数解耦的方法对桩周饱和土和桩芯饱和土的水平振动进行了求解。在考虑桩周饱和土和桩芯饱和土对管桩作用的情况下对饱和土中管桩的水平振动进行了求解，得到了管桩桩顶的水平动力阻抗，并分析了主要桩、土参数对管桩水平动力阻抗的影响。研究表明：管桩内外半径、桩周土和桩芯土剪切模量比、泊松比之比对管桩水平动力阻抗的影响较大，低频时液-固耦合系数比对管桩水平动力阻抗有一定的影响，而阻尼比之比对管桩水平动力阻抗阻尼因子有一定的影响。
為瞭攷察樁、土主要參數對飽和土中管樁水平振動的影響，將土體分為樁週飽和土和樁芯飽和土兩部分，利用多孔介質理論的飽和土控製方程建立瞭飽和土-管樁的耦閤振動模型。在攷慮樁週飽和土和樁芯飽和土邊界條件的情況下，運用勢函數解耦的方法對樁週飽和土和樁芯飽和土的水平振動進行瞭求解。在攷慮樁週飽和土和樁芯飽和土對管樁作用的情況下對飽和土中管樁的水平振動進行瞭求解，得到瞭管樁樁頂的水平動力阻抗，併分析瞭主要樁、土參數對管樁水平動力阻抗的影響。研究錶明：管樁內外半徑、樁週土和樁芯土剪切模量比、泊鬆比之比對管樁水平動力阻抗的影響較大，低頻時液-固耦閤繫數比對管樁水平動力阻抗有一定的影響，而阻尼比之比對管樁水平動力阻抗阻尼因子有一定的影響。
위료고찰장、토주요삼수대포화토중관장수평진동적영향，장토체분위장주포화토화장심포화토량부분，이용다공개질이론적포화토공제방정건립료포화토-관장적우합진동모형。재고필장주포화토화장심포화토변계조건적정황하，운용세함수해우적방법대장주포화토화장심포화토적수평진동진행료구해。재고필장주포화토화장심포화토대관장작용적정황하대포화토중관장적수평진동진행료구해，득도료관장장정적수평동력조항，병분석료주요장、토삼수대관장수평동력조항적영향。연구표명：관장내외반경、장주토화장심토전절모량비、박송비지비대관장수평동력조항적영향교대，저빈시액-고우합계수비대관장수평동력조항유일정적영향，이조니비지비대관장수평동력조항조니인자유일정적영향。
In order to investigate the influence of main parameters of pile and soil on the lateral vibration of pipe pile in saturated soil, the soil is divided into saturated soil around pile and inner pile saturated soil, and coupling dynamic model of the saturated soil-pipe pile is established by using the control equations of theory of porous medium. By considering the boundaries of saturated soil around pile and inner pile saturated soil, the lateral vibrations of saturated soil around pile and inner pile core saturated soil are solved with the uncoupling method of potential function. The horizontal vibration of pipe pile in saturated soil is also solved by considering the forces of saturated soil around pile and inner pile saturated soil acting on pipe pile, and the lateral dynamic impedance of the pipe pile at pile head is obtained;the influence of main parameters on the lateral vibration of pipe pile in saturated soil is also analyzed. The research results indicate that the influence of the inner and outer radii of pipe pile, shear modulus ratio, Poisson’ ratio of pile around saturated soil and pile core saturated soil on the lateral dynamic impedance of pipe pile in saturated soil is great; fluid-solid coefficient ratio has a certain influence on lateral dynamic impedance at low frequency;and the ratio of damping ratio has a certain influence on the damping factor of lateral dynamic impedance.
