土工三轴试验方法-静动耦合试验  

Triaxial test method-the coupling static-dynamic test

作　　者：贾革续[1] 孔宪京[1] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116023

出　　处：《世界地震工程》2005年第2期1-6,共6页World Earthquake Engineering

基　　金：国家自然科学基金重点资助项目(59639250)

摘　　要：尝试了一种新的土工三轴试验方法,即在一个试样同时得到与土体静动变形和强度特性相关的各种参数。文中讨论了采用耦合试验方法时应变循环大小对静力变形和强度特性的影响;并通过与常规试验结果的比较,给出了等效弹性模量、等效阻尼比和动永久应变等动力变形参数的试验结果。试验结果表明采用耦合试验复杂加载方式,能够更深入地研究土体的静、动变形和强度特性,尤其在复杂应力条件下的动力变形特性方面。In this paper, a new geotecnical triaxial testing approach is proposed, that is, the Coupling Static-Dynamic Test. The parameters related to the characteristics of deformation and strength for one specimen of soil subjected to static and dynamic loads can be obtained simultaneously by the new testing method. The effect of the cyclic strain on the chracteristics of the soil deformation and strength under static and dynamic loads are discussed. Through the comparison with the results from the convensional tests, the dynamic deformation parameters, such as the equivalent dynamic elastic modulus, the equivalent damping ratio and the dynamic permanent deformation, are given. The testing results indicate that the characteristics of the soil deformation and strength under static and dynamic loads, especially in complex stress states can be investigated deeply by the coupling static-dynamic test.

关 键 词：试验方法 耦合试验 三轴 土工 强度特性 试验结果 等效弹性模量 动力变形特性 等效阻尼比 变形参数 加载方式 应力条件 动变形 变循环 土体 

分 类 号：TU411.7[建筑科学—岩土工程] TQ320.52[建筑科学—土工工程]