摘要
研究了用空间杆系有限元进行钢筋混凝土结构空间弹塑性极限承载力分析中求截面弹塑性刚度的Cranston方法。通过理论分析,指出了已有方法在Cranston迭代收敛后求截面刚度的缺陷或不明确之处,提出了用有效截面的换算截面重心及数值积分求截面刚度时,均应采用微元切线模量的观点。在自编程序中采用不同模量对同一试验进行了全过程分析,有限元分析结果与试验结果对比,证明了该方法的正确性,可以用于大跨度钢筋混凝土结构的极限承载力分析。
The method of how to calculate the section＇s stifness of the RC structure by link and beam finite dements is researched.By theoretical analysis, the defects or ambiguities in the existing Cranston method are discussed and pointed out. The standpoint that the tangent modulus should be used when calculating the center of gravity and stiffness of the useful cross section is brought forward.Various modulus were adopted in the program to analyze the test. The conclusion shows that the method is right comparing the FEM results with the test results and can be used to analyze the limit bearing capacity of large span concrete structure.
出处
《公路交通科技》
CAS
CSCD
北大核心
2006年第4期67-70,共4页
Journal of Highway and Transportation Research and Development
关键词
空间杆系
弹塑性极限承栽力
截面刚度
Cranston法
Spatial staff finite dement
Elastic-plastic ultimate load capacity
Section stiffness
Cranston method
