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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。
A test database including 151 reinforced concrete shear walls with dark columns was established. The data of 89 samples of bending failure were screened. Based on the five stress-strain curves of concrete and four models of plastic hinge length, Considering the proportion of the shear displacement in the total displacement of the shear wall under bending failure, a concrete calculation method of the limit displacement of the shear wall with concealed columns is proposed. Combining the five stress-strain models and the four plastic hinge models The calculated results of 20 combined calculation models are compared with those of the test data of the flexural failure shear wall collected to obtain the most suitable model for calculating the ultimate displacement of the shear wall with flexural failure. The results show that the concrete stress-strain model is the most accurate for the Saatcioglu model, and the plastic hinge length model is the most accurate for the Paulay model. The calculation of the ultimate displacement between the two models is the most accurate in the 20 combined calculation models and is most suitable for the calculation of bending failure Reinforced concrete shear wall limit displacement. Based on the experimental data, based on the Saatcioglu model and the Paulay model, the calculation model is adjusted and corrected. Compared with the experimental results, the modified model is more consistent with the experimental data than the Saatcioglu model and the Paulay model. The average value is basically unchanged, but the coefficient of variation Reduce, can be more accurately calculate the ultimate failure of reinforced concrete shear wall bending failure.