基于压剪试验的框架梁柱与剪力墙连接方法的研究

发布时间：2018-01-31 20:22

本文关键词： 装配式框架剪力墙结构柱-墙连接梁-墙连接压剪试验　出处：《沈阳建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：为提高装配式框架-剪力墙结构的预制化率,对装配式框架-剪力墙结构中预制构件的连接性能进行研究。本文针对预制柱-墙连接和预制梁-墙连接进行了研究。首先,针对柱-墙连接,本文提出了U型筋连接、直型筋连接、连环扣连接和直U型筋连接四种预制柱-预制墙的连接构造方案,设计并制作六个S型试件,一个现浇式试件,四个设置键槽采用不同连接方式和一个不设置键槽采用U型筋连接方式的装配式试件,为研究柱-墙连接区域的剪切性能,试件进行压剪试验。对试件在竖向重复循环荷载作用下的开裂及破坏形态、滞回特性、骨架曲线、特征荷载、特征位移和钢筋应变情况进行了系统研究。结果表明：设置键槽的装配式试件与现浇试件的破坏形态大致相同,四种连接方式都是可行的,其中连环扣连接和直U型筋连接两种试件的变形和裂缝分布最好,承载力最高；不设置键槽的装配式试件相比设置键槽的试件承载能力大幅降低,破坏也较突然。其次,针对梁-墙连接,为研究装配式框架-剪力墙结构中梁-墙的套筒连接性能,本文针对双排直筋贯通现浇、等代钢筋贯通现浇和等待钢筋套筒连接装配三种梁-墙连接方式,设计并制作三种六个S型试件。通过压剪试验,研究梁-墙连接区域的剪切性能,压剪试验中还考虑了连接面压应力的影响。对试件在竖向重复循环荷载作用下的开裂及破坏形态、循环特性、骨架曲线、特征荷载、特征位移和钢筋应变情况进行了系统研究。结果表明：等代钢筋贯通现浇试件具有更好的承载能力；等代钢筋套筒连接装配试件的承载能力相对较差；设置轴压比能够使试件的抗剪能力得到很大程度的提高,且试件的变形和裂缝分布也相对较好。然后,运用WCOMD有限元分析软件对这2组12个试件进行了非线性有限元分析,模拟分析的结果与试验的结果基本相符,验证了WCOMD有限元分析的可行性和可靠性,并且在这基础之上,对试件的各因素进行简单分析。最后,参照以往国内外参考文献中提出的相关抗剪强度计算公式,分析并提取与本课题研究相关的重要因素,拟合出装配式梁柱与墙结合面的抗剪强度简化计算公式,且根据试验数据验证了计算公式的可行性。
[Abstract]:In order to improve prefabrication rate of prefabricated frame-shear wall structure. The connection performance of prefabricated members in prefabricated frame-shear wall structures is studied. The prefabricated column-wall connections and prefabricated beam-wall connections are studied in this paper. In this paper, four kinds of prefabricated column-precast wall construction schemes are proposed, including U-type steel connection, straight reinforcement connection, serial buckle connection and straight U-type reinforcement connection. Six S-type specimens and one cast-in-place specimen are designed and made. Four prefabricated specimens with different connection modes and one unset keyway with U-shaped tendons were used to study the shear behavior of the column-wall connection area. The cracking and failure patterns, hysteretic characteristics, skeleton curves and characteristic loads of the specimens under vertical repeated cyclic loading were investigated. The characteristic displacement and the strain of steel bar are studied systematically. The results show that the failure pattern of the assembled specimen with keyway is about the same as that of the cast-in-place specimen, and the four connection modes are feasible. The deformation and crack distribution of the two specimens are the best and the bearing capacity is the highest. The load-carrying capacity of the assembled specimen without keyway is significantly lower than that of the specimen with the keyway, and the damage is also sudden. Secondly, the beam-wall connection is aimed at the beam-wall connection. In order to study the behavior of sleeve connection between beam and wall in prefabricated frame-shear wall structure, this paper aims at three kinds of beam-wall connection modes: double-row straight reinforcement through cast-in-situ, equal generation steel bar through cast-in-situ and waiting for reinforcement sleeve to connect and assemble. Three kinds of six S-shaped specimens were designed and made. The shear behavior of beam-wall connection region was studied by compression shear test. In the compression shear test, the influence of compressive stress on the connection surface is also taken into account. The cracking and failure patterns, cyclic characteristics, skeleton curves and characteristic loads of the specimens under the vertical repeated cyclic load are also considered. The characteristic displacement and the strain of steel bar are studied systematically. The results show that the equivalent steel bar through the cast-in-place specimen has better bearing capacity; The load-carrying capacity of the same generation steel sleeve assembly specimen is relatively poor. Setting axial compression ratio can greatly improve the shear resistance of the specimen, and the deformation and crack distribution of the specimen is relatively good. Then. The nonlinear finite element analysis of these two groups of 12 specimens is carried out by using WCOMD software. The results of simulation analysis are in good agreement with the experimental results. The feasibility and reliability of WCOMD finite element analysis are verified, and on the basis of this, the factors of the specimen are analyzed simply. Finally. Referring to the relevant formulas of shear strength which have been put forward in the previous references at home and abroad, the important factors related to this research are analyzed and extracted, and the simplified formula of shear strength of assembled Liang Zhu and wall joint surface is fitted out. The feasibility of the formula is verified according to the experimental data.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU756

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