摘要
将纤维增强混凝土(FRC)增强的梁柱板组合件的变形分解为节点变形、梁变形和柱变形引起的变形之和,通过贝叶斯参数估计方法建立了节点核心区剪应力-剪切变形模型;采用力学分析,建立了梁端与柱端的弯矩-曲率模型,由此建立了预期损伤部位采用FRC增强的梁柱板组合件的力-位移模型。结果表明:采用该文建立的力-位移模型的分析结果与试验结果符合较好;柱梁抗弯承载力比从1.1增大到1.6时,峰值荷载下总变形中节点变形的比率平均下降了37.4%,而梁变形比率平均增加了58.8%;相对于考虑6倍板厚翼缘宽度,考虑8倍板厚翼缘宽度更能有效控制节点变形,其峰值荷载下总变形中节点变形的比率平均下降了33.4%,而梁变形比率平均增加了42.9%。
The sources of deformation for a fiber-reinforced concrete （FRC） beam-column-slab subassembly are considered to be contributed by the joint shear deformation, beam deformation and column deformation. The Bayesian parameter estimation was applied to predict the joint shear capacity. Mechanical analysis was conducted to establish the moment-curvature model of the beam end and column end. A complete model applicable to the subassemblies is proposed. The computational results show that when the column-to-beam strength ratio increased from 1.1 to 1.6, the contribution of the joint shear deformation to total displacement at peak load is decreased by 37.4%, and the contribution of beam deformation is increased by 58.8%. The slab was beneficial to control the joint shear deformation. The subassemblies with slabs of flange width of eight times the slab thickness on each side of the beam could control the joint shear deformation more effectively. The contribution of the joint shear deformation to total displacement at peak load can be decreased by 33.4%, and the contribution of the beam deformation increased by 42.9%.
出处
《工程力学》
EI
CSCD
北大核心
2018年第2期133-143,共11页
Engineering Mechanics
基金
国家自然科学基金项目(51278402
51078305)
关键词
纤维增强混凝土
梁柱板组合件
力学模型
贝叶斯参数估计
变形
fiber-reinforced concrete （FRC）
beam-column-slab subassembly
mechanical model
Bayesian parameter estimation
deformation
