大坝效应量的简单相关和偏相关比较研究

Study of Dam Effect-variable Based on Partial Correlation and Simple Correlation Analysis

针对大坝监测项目中效应量的变化与库水位、降雨、温度、时效等相关,以某重力拱坝为例,比较分析了坝顶水平位移及影响因子的简单相关系数和偏相关系数。结果表明,采用偏相关分析必须在固定效应量或其他影响量的前提下研究相关关系,方能真正反映二者的本质联系。

In projects of dam safety monitoring, changes of effect-variables are often related to reservoir water level, rainfall, temperature, and aging etc. Taking the arched gravity dam for an example, horizontal displacement of dam crest and impact factors are analyzed by using simple correlation and partial correlation coefficients. The results show that it must consider fixed effect-variable or other variables to study relationship with partial correlation analysis, and the correct relationship can be obtained.