土工织物加筋土坡附近带状壳体的基础承载力研究

从经济角度来看,城市化经常迫使居民在斜坡附近建造上层建筑,但是这增加了建筑物失稳的风险.本文通过一系列小规模的板载试验,在沙质边坡中安装土工织物来加固层,并研究减小三角壳条形基础的顶角的影响.结果表明,使用土工织物增强层并减小顶角对壳基础的极限承载力具有显著效果.随着距斜坡地基距离的延长,斜坡的不利影响减小.但是,随着...     

Thermogravimetric kinetic analysis of Nannochloropsis oculata combustion in air atmosphere

The thermal behavior of Nannochloropsis oculata combustion in air atmosphere were investigated by performing experiments on STA PT1600 Thermal Analyzer at heating rates of 10°C/min, 40°C/min and 70°C/min and range of temperatures from room temperature to 1200°C. The kinetic parameters were evaluated by using Kissinger and Ozawa methods. The result showed that Nannochloropsis oculata combustion occurred in five stages. Started with initial devolatilization, the main thermal decomposition and combustion process, transition stage, the combustion of char and the last stage was the slow burning reaction of residual char. In line with increasing heating rate, the mass loss rate increased as well, but it delayed the thermal decomposition processes toward higher temperatures. The average activation energy at the main thermal decomposition stage and the stage of char combustion were approximately 251 kJ/mol and 178 kJ/mol, respectively.