埋地管线-土横向动力相互作用等效弹簧系数解析解  

Analytical solution of soil spring constant for buried pipeline-soil lateral dynamic interaction

作　　者：孙千伟[1] 刘威[1] 李杰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《地震工程与工程振动》2012年第1期139-145,共7页Earthquake Engineering and Engineering Dynamics

基　　金：科技部国家重点实验室基金(SLDRCE09-B-12);国家自然科学基金委青年科学基金项目(50808144)

摘　　要：基于一维柱面弹性波动理论,推导了埋地管线-土横向动力相互作用等效弹簧系数解析表达式,并对该表达式的影响因素,诸如频率(ω)、管线埋深(d)、管线半径(b)、场地波速(VP)、泊松比(μ)的影响程度进行了分析。分析结果表明,无量纲频率bω/VP取较小值时(<0.1),弹簧系数取值随着管线埋深与管线半径之比γ的增加而增大,但总是限制在2.0G～4.0G(G为土体剪切模量)之间,且泊松比对其影响很小,对于工程实际情况,弹簧系数可在该范围内取值。Based on one-dimensional wave motion theory in cylindrical coordinates,the analytical expression of soil spring constant for buried pipeline-soil lateral dynamic interaction is derived.The influence factors,such as frequency（ω）,depth of pipeline（d）,radius of pipeline（b）,P-wave velocity（VP）,Possion ratio（μ） are analyzed.The results show that when non-dimensional frequency bω/VP is smaller than 0.1,soil spring constant increases with the ratio γ of the depth of pipeline over the radius of pipeline,but is limited in 2.0G^4.0G（G= soil shear modulus）,meanwhile,the influence of Possion ratio is negligible.For engineering application,the soil spring constant between 2.0G^4.0G is recommended.

关 键 词：管-土横向动力相互作用 土弹簧系数 解析解 

分 类 号：TU435[建筑科学—岩土工程] P315.93[建筑科学—土工工程]