岩土工程学报2013，Vol.35Issue(3)：583-589,7.
海积结构性软土动力性状的循环荷载波形效应与刚度软化特征
Waveform effect of cyclic loading of dynamic character and stiffness degradation characteristics of marine deposited natural soft clay
摘要
Abstract
Dynamic characteristics of natural soft clay under long-term cyclic loading have been widely studied. However, the previous researches focued on the dynamic characteristics under only one kind of cyclic loading waveform. Different kinds of exterior cyclic loading affect the natural soft clay subgrade, such as earthquakes, high buildings, high speed rails, wave loads, oil tanks, reservoirs and so on, and they demonstrate different wave patterns. Stress-controlled dynamic triaxial tests are performed under the square, triangle, sine cyclic loading, and considering the effects of cyclic numbers, dynamic amplitudes, and frequencies, the dynamic characteristics of natural soft clay are studied and analyzed, and the dynamic characteristics under different cyclic loading waveforms are compared. For comparing the stiffness degradation of soft clay under different cyclic loading waveforms, degradation index defined by cyclic shear modulus is used to analyze the stiffness degradation process.关键词
海积结构性软土/循环荷载波形/刚度软化Key words
marine deposited natural soft clay, cyclic loading waveform/ stiffness degradation分类
建筑与水利引用本文复制引用
曹勇,孔令伟,杨爱武..海积结构性软土动力性状的循环荷载波形效应与刚度软化特征[J].岩土工程学报,2013,35(3):583-589,7.基金项目
国家自然科学基金项目(51179186) （51179186）
湖北省自然科学基金创新群体项目(2011CDA124) （2011CDA124）
