摘要
钢筋混凝土构件在荷载、周围环境及钢筋混凝土材料等因素的共同影响下,其可靠度会随时间的增长而降低。文中总结了可能导致混凝土构件可靠度降低的因素,考虑了混凝土构件抗力的时变特性,通过Matlab软件对混凝土短柱的时变可靠度进行了分析,并用JC法计算了短柱的可靠度,得到了其可靠度随时间的变化曲线,进而用最小二乘法得出了曲线拟和的方程,为进一步研究构件的时变可靠度提供了一种新思路。
With time passing, reliability of reinforced concrete elements will decrease under the influence of action of the loads, surroundings and the inner factors of material. This paper sums up the factors that may reduce the reliability of structures and considers time-dependent character of the resistance. Time-dependent reliability of a short concrete column is analyzed and calculated by maflab, the curve of reliability with time are presented. To further study the laws, the paper fits the curve by least-square method and gets the equations. A method to further study time-dependent reliability of reinforced concrete structures has been provided.
出处
《结构工程师》
2008年第2期16-21,27,共7页
Structural Engineers
基金
国家自然科学基金(5078135/E080506)
同济大学岩土及地下工程教育部重点实验室资助
关键词
时变可靠度
钢筋混凝土短柱
抗力
验算点法
最小二乘法
time-dependent reliability, reinforced concrete puncheon, resistance, JC method, least-square method
