基于试验数据的带暗柱受弯破坏钢筋混凝土剪力墙极限位移计算方法研究

建立了1个包含151个带暗柱钢筋混凝土剪力墙的试验数据库，筛选出89个受弯破坏试件数据，综合已有研究的5种混凝土应力-应变模型和4种塑性铰长度模型，考虑剪切位移在受弯破坏剪力墙总位移中所占的比例，提出带暗柱剪力墙极限位移的具体计算方法，将这5种应力-应变模型和4种塑性铰模型两两组合，得到20种组合计算模型的计算结果，与所收集的受弯破坏剪力墙试验数据进行对比，得到最适合计算受弯破坏剪力墙极限位移的模型。结果表明，混凝土应力-应变模型以Saatcioglu模型最为准确，塑性铰长度模型以Paulay模型最为准确，两者组合得到的极限位移计算值在20种组合计算模型中最为准确，最适用于计算受弯破坏钢筋混凝土剪力墙极限位移。基于试验数据，在Saatcioglu模型和Paulay模型的基础上，对计算模型进行调整修正，与试验对比后发现，修正模型比Saatcioglu模型和Paulay模型组合更符合试验数据，平均值基本不变，但变异系数减小，可较为准确地计算受弯破坏钢筋混凝土剪力墙极限位移。

Experimental data-based calculation method for ultimate displacement of flexure dominated RC walls with concealed columns

This paper establishes a database which contains 151 experimental reinforced concrete walls with concealed columns. 89 flexure dominant walls were selected. Based on the previous research on five types of confined concrete stress-strain models, four types of plastic hinge length models, and the relationship between bending deformation and shear deformation in flexure dominant walls, the calculation method of ultimate deformation of shear walls was given. The five concrete stress-strain models and four plastic models are combined with each other. 20 calculation results were obtained and compared with experimental data. Results show that the combination of Saatcioglu concrete stress-strain model and Paulay plastic hinge length model is most suitable to calculate the ultimate displacement of shear walls. Based on Saatcioglu-Paulay model, an experimental data-based modified calculation method was proposed. Results show that this model is more accurate than the Saatcioglu-Paulay model and can accurately predict the ultimate displacement of flexure dominant shear walls with concealed columns.