文献类型：期刊文献

中文题名：滨海相软土应力–应变曲线复合指数–双曲线模型

英文题名：Composite exponential-hyperbolic model for stress-strain curve of seashore soft soil

作者：王伟[1,2,3];宋新江[3];凌华[4];卢廷浩[3];周干武[4]

机构：[1]绍兴文理学院土木工程系;[2]中国科学院冻土工程国家重点实验室;[3]河海大学岩土工程科学研究所;[4]南京水利科学研究院岩土工程研究所

年份：2010

期号：9

起止页码：1455

中文期刊名：岩土工程学报

外文期刊名：Chinese Journal of Geotechnical Engineering

收录：CSTPCD、、EI(收录号：20104213309812)、Scopus(收录号：2-s2.0-77957956628)、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：中科院冻土工程国家重点实验室开放基金项目(SKLFSE200603);浙江省自然科学基金项目(Y1080839);浙江省高校优秀青年教师计划项目(浙教办高科2008-176号)

语种：中文

中文关键词：软土;应变;应力;复合模型

外文关键词：soft soil; strain; stress; composite model

中文摘要：滨海相软土应力–应变曲线数学模型是岩土工程研究的一个重要课题。结合软土应力–应变曲线的发展特点,分析了其数学模型应具有的基本性质。对传统双曲线模型和指数模型进行了数学分析,根据泰勒级数展开证明了两模型的数学关系。引入应力因子的概念,揭示了传统应力–应变模型的缺陷。提出了一个应力–应变曲线的3参数复合双曲线–指数模型,推导了改进切线模量的表达式。数学分析表明,新模型克服了传统模型的不足,传统模型及其应力因子均是新模型对应的特例。结合实验数据,给出了模型参数的确定方法。新模型能够很好的模拟试验数据。

外文摘要：The mathematical model for stress-strain curve is an important issue to study the mechanical behaviors of seashore soft soil. Based on the properties of developing process, the primary mathematical behavior that stress-strain model should fulfill is analyzed. Mathematical investigation on two conventional stress-strain models, namely hyperbolic model and exponential model, is conducted. Difference between the conventional models is remarked based on the Taylor series expansion and stress index is proposed and employed to signalize their shortcomings. A composite exponential-hyperbolic stress-strain model with three parameters is established, and a formula for the improved tangent modulus is deduced. The mathematical analysis shows that model functions and stress indexes of the conventional models are simplified expressions of those of the new three-parameter model, respectively. The proposed model absolutely overcomes the shortcomings of the conventional models. According to the test data, an approach to determine the model parameters is presented. Finally, good accuracy of the new model is proved.