Transactions of Nanjing University of Aeronautics and AstronauticsIssue 4, (2010)
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Published:2010
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艾军, 陈珏, 张丽芳, et al. 钢筋混凝土梁抗弯刚度公式修正及研究[J]. Transactions of Nanjing University of Aeronautics and Astronautics, 2010, (4).
DOI:
艾军, 陈珏, 张丽芳, et al. 钢筋混凝土梁抗弯刚度公式修正及研究[J]. Transactions of Nanjing University of Aeronautics and Astronautics, 2010, (4).DOI:
钢筋混凝土梁抗弯刚度公式修正及研究
摘要
Abstract
Beam stiffness degrades with its age in service and its service performanc e is weakened. According to the fundamental characteristics of the reinforced co ncre te
the influence of stiffness degradation caused by different kinds of damage i s obtained. Among them
the crack is the most direct and obvious factor. Further more
according to the analysis of bending rigidity formula presented in current stan dard
an influence parameter of crack development on the stiffness degradation
i.e.
nonuniformity coefficient of tensile steel strain φ
is extracted. Av erage crack distance and crack depth are taken as crack statistic parameters. Based o n analysis and modeling with ANSYS
the modified bending rigidity formula relate d to crack is obtained.