吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (4): 1122-1132.doi: 10.13229/j.cnki.jdxbgxb.20210796
• 交通运输工程·土木工程 • 上一篇
Fan YANG1(),Chen-chen LI1,2,Sheng LI3(),Hai-lun LIU1
摘要:
利用钢筋等效原理建立双层配筋CRCP在温缩作用下的数值模型并进行验证,在此基础上运用L50正交表设计数值仿真工况,以横向裂缝宽度bj、纵向钢筋应力极值σs,max和混凝土应力极值σc,max作为评价指标,对11项配筋设计参数进行敏感性分析和显著性排序。显著性分析表明,线膨胀系数、温降和配筋率、粘结刚度系数、钢筋弹性模量对CRCP力学响应影响较为显著,应作为双层配筋CRCP主要设计指标。在双层配筋CRCP的配筋率设计试算中,建议将配筋率ρ依次按照ρ∈[0.60%,0.80%]、ρ∈[0.80%,1.00%]、ρ∈[1.00%,1.20%]三个取值区间进行试算;将连续配筋混凝土(CRC)板体的1/3厚度处作为上层纵向钢筋和下层纵向钢筋的取值基点。
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