| 砂岩的高温损伤与模量分析 |
| |
| 引用本文： | 王鹏,许金余,刘石,陈腾飞,方新宇.砂岩的高温损伤与模量分析[J].岩土力学,2014,35(Z2):211-216. |
| |
| 作者姓名： | 王鹏 许金余 刘石 陈腾飞 方新宇 |
| |
| 作者单位： | 1.空军工程大学 机场建筑工程系，西安 710038；2.西北工业大学 力学与土木建筑学院，西安 710072 |
| |
| 基金项目： | 国家自然科学基金（No. 51378497）。 |
| |
| 摘 要： | 通过定义砂岩试样压缩破坏过程的4个阶段模量，对高温（25℃～1 000℃）后砂岩压缩破坏的应力-应变全过程进行定量研究。分析砂岩高温后的模量特征和超声特性，并基于压缩模量定义高温作用后砂岩试样的热损伤因子，对不同温度作用后的砂岩试样进行损伤分析，发现高温后砂岩压缩破坏具有明显的阶段性特征；4个阶段的阶段模量随温度的变化规律各有不同；压密模量与纵波波速具有很强的相关性；基于压密模量定义的高温后砂岩试样热损伤因子避开了基于纵波波速定义方法，未考虑温度对密度和泊松比影响的缺陷，更具科学性；25～200 ℃温度区间内砂岩试样热损伤对温度最敏感。研究成果对高温环境岩石工程具有一定的指导意义。
|
| 关 键 词： | 砂岩 高温 压密模量 超声特性 损伤因子 |
| 收稿时间： | 2014-02-07 |
Analysis of high temperature damage and modulus of sandstone |
| |
| WANG Peng,XU Jin-yu,LIU Shi,CHEN Teng-fei,FANG Xing-yu.Analysis of high temperature damage and modulus of sandstone[J].Rock and Soil Mechanics,2014,35(Z2):211-216. |
| |
| Authors: | WANG Peng XU Jin-yu LIU Shi CHEN Teng-fei FANG Xing-yu |
| |
| Institution: | 1. Department of Airfield and Building Engineering, Air Force Engineering University, Xi′an 710038, China; 2. College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi′an 710072, China |
| |
| Abstract: | Moduli of the four stages during the compression of sandstone after high temperature varying from 25℃ to 1 000℃ are defined, through which the complete stress-strain curves of sandstone are analyzed. The modulus characteristics are analyzed as well as the ultrasonic properties. The damage of sandstone after different high temperatures is analyzed based on the damage factor which is defined by the modulus of compact stage. The research shows that the compression of sandstone after different high temperatures is of prominent staged characteristic. The changing rules of moduli of the four stages with variations of temperatures are not different, among which the modulus of compact stage has a strong relativity with the longitudinal wave velocity. The damage factor defined by wave velocity loses sight of the density and Poisson’s ratio. Avoiding the defect of Vp-method, the damage factor defined by modulus of compact stage is of greater scientificalness. Within the temperature range of 25 ℃-200 ℃, the thermal damage of sandstone is more sensitive to temperature. The results have some guiding significance to rock engineering in high temperature environment. |
| |
| Keywords: | sandstone high temperature modulus of compact stage ultrasonic properties damage factor |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
