管-土轴向动力相互作用等效弹簧系数取值  

Soil Spring Constant of Buried Pipeline-soil Longitudinal Dynamic Interaction

作　　者：孙千伟[1] 刘威[1] 李杰[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2012年第8期1123-1128,共6页Journal of Tongji University:Natural Science

基　　金：科技部国家重点实验室基金(SLDRCE09-B-12);"十二五"国家科技支撑计划(2011BAK02B04)

摘　　要：通过解析法和振动台试验数据对埋地管线管-土轴向动力相互作用等效弹簧系数取值进行研究.从一维柱面SH波波动方程出发,重新阐释Matsubara和Hoshiya推导的管-土轴向动力相互作用等效弹簧系数解析表达式,并对主要影响参数进行分析;利用埋地管线振动台试验结果对小震时(0.1g)管-土轴向动力相互作用进行分析,给出等效弹簧系数,并与解析解进行对比.分析结果表明,对于本试验条件,采用解析法计算的等效弹簧系数和试验分析结果较为接近,相对偏差约为7.4%,在一定程度上验证了解析方法的合理性,并根据工程需要,给出管和土未发生相对大位移时的等效弹簧系数取值范围:0.6G～2.0G(G为土体剪切模量).Soil spring constant of buried pipeline-soil longitudinal dynamic interaction based on theory and shaking table test is presented. According to one-dimensional SH wave motion theory in cylindrical coordinates, Matsubara ＆ Hoshiya＇s theoretical expression is reinterpreted. Based on shaking table test data of buried pipeline-soil dynamic interaction subjected to small earthquake excitation （0. lg）, the soil spring constant is analyzed. The results show that on this test condition the two values of soil spring constant are similar, and the relative deviation is about 7. 4%, which verifies the rationality of theoretical solution. Furthermore, soil spring constant at small slippage between pipeline and soil is recommended for engineering application, that is 0.6 G 2.0 G （ G = soil shear modulus）.

关 键 词：管-土轴向动力相互作用 振动台试验 土弹簧系数 

分 类 号：TU435[建筑科学—岩土工程]