摘要
本文以文献[1] 的试验数据为基础,采用几种徐变特性公式用 Maquardt 算法分别对三个月、一年、二年左右的试验数据进行拟合确定了徐变特性参数.用一年左右和二年左右试验数据确定的徐变特性参数表示的徐变曲线与试验曲线相比较,结果表明它们之间相差很小.因此,建议在实际工程中可用一年左右的试验数据确定的徐变特性参数来对结构进行分析和计算,就可保证足够的精度和准确性.
In this paper,based on the test data in reference[1] and Maquardt algorithm,the parameters of several creep property formula are determined through test data in three months and one year,and two years respectively.It is shown that creep curve determined by creep parameters,obtained by test data in one year or two years,is totally in agreement with the test curve.Therefore,it is proposed that creep parameters determined by test data in one year are adopted in practical engineering to assure a good precision in analysis and calculation of structures.
出处
《长沙铁道学院学报》
CSCD
1993年第1期19-26,共8页
Journal of Changsha Railway University
关键词
预应混凝土
徐变特性参数
prestressed concrete,parameters of creep property,maquardt algorithm
