一种新型螺栓连接预制剪力墙抗震性能分析
Seismic Performance of a New Precast Concrete Shear Wall with Bolt Connection
作者：李万润(兰州理工大学 防震减灾研究所, 甘肃 兰州 730050;兰州理工大学 甘肃省土木工程防灾减灾重点实验室, 甘肃 兰州 730050;兰州理工大学 西部土木工程防灾减灾教育部工程研究中心, 甘肃 兰州 730050)；向荣江(兰州理工大学 防震减灾研究所, 甘肃 兰州 730050)；杜永峰(兰州理工大学 防震减灾研究所, 甘肃 兰州 730050;兰州理工大学 甘肃省土木工程防灾减灾重点实验室, 甘肃 兰州 730050;兰州理工大学 西部土木工程防灾减灾教育部工程研究中心, 甘肃 兰州 730050)
Author：LI Wanrun(Inst. of Earthquake Protection and Disaster Mitigation, Lanzhou Univ. of Technol., Lanzhou 730050, China;Key Lab. of Disaster Prevention and Mitigation in Civil Eng. of Gansu Province, Lanzhou Univ. of Technol., Lanzhou 730050, China;Western Eng. Research Center of Disaster Mitigation in Civil Eng. of Ministry of Education, Lanzhou Univ. of Technol., Lanzhou 730050, China)；XIANG Rongjiang(Inst. of Earthquake Protection and Disaster Mitigation, Lanzhou Univ. of Technol., Lanzhou 730050, China)；DU Yongfeng(Inst. of Earthquake Protection and Disaster Mitigation, Lanzhou Univ. of Technol., Lanzhou 730050, China;Key Lab. of Disaster Prevention and Mitigation in Civil Eng. of Gansu Province, Lanzhou Univ. of Technol., Lanzhou 730050, China;Western Eng. Research Center of Disaster Mitigation in Civil Eng. of Ministry of Education, Lanzhou Univ. of Technol., Lanzhou 730050, China)
收稿日期：2018-10-21 年卷（期）页码：2019,51(5):78-86
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：预制混凝土剪力墙;水平接缝;承载力;螺栓连接;轴压比;高宽比;抗震性能
Key words：precast concrete shear walls;horizontal joint;bearing capacity;bolt connection;axial compression ratio;height-width ratio;seismic performance
基金项目：国家自然科学基金项目（51778276）；甘肃省重点研发计划项目（18YF1FA067）
中文摘要
在预制装配式剪力墙结构中，预制构件之间的可靠连接是学者们关注的焦点。为避免施工过程中接缝处繁琐的后浇过程，提出一种新型预制剪力墙水平接缝连接方式，并对其抗震性能进行研究。通过建立现浇整体式剪力墙精细化有限元模型，对其抗震性能进行分析，并与试验结果进行对比，验证该模型的可靠性。基于此，建立采用新型连接方式的预制剪力墙与同尺寸的现浇整体式剪力墙有限元模型，分别分析轴压比和高宽比的变化对其抗震性能的影响。结果表明：模型YZ-3正向及反向加载的承载能力分别比XJ-3高3.3%和5.4%，模型YZ-1极限承载力比模型XJ-1高4.8%，即相同条件下，预制剪力墙的承载能力比现浇剪力墙的承载能力高，且随轴压比的增大预制剪力墙的承载能力增大越明显。随着高宽比的减小，模型YZ-4及模型YZ-5与YZ-2相比，极限承载力分别提高44.2%和79.0%，初始刚度分别提高18.0%和47.1%。新型预制剪力墙承载能力随高宽比变小逐渐变强，初始刚度逐渐变大；新型预制剪力墙的延性较现浇整体式剪力墙的延性好，抗震性能基本相似。新型连接方式能有效地传递钢筋应力，可以作为一种可靠的连接方式。
英文摘要
In prefabricated shear wall structures, the reliable connection between prefabricated components is the concerning focus. In order to avoid the tedious post-pouring process of horizontal joints during construction, a new type of connection method of precast concrete shear wall horizontal joint is proposed and its seismic performance was studied. The seismic performance of the cast-in-place monolithic shear wall was analyzed by establishing a refined finite element model, and the reliability was verified by comparing with the test results. Hereby the finite element model of the precast specimens with new connection method and the same size cast-in-place integral shear wall was established, and the seismic performance of the precast specimens was analyzed by considering the axial compression ratio and aspect ratio, respectively. The results show that the ultimate bearing capacity of precast concrete shear wall YZ-3 under forward loading is 3.3% higher than that of XJ-3 and the reverse loading is 5.4%, The ultimate load of model YZ-1 is 4.8% higher than that of the model XJ-1. Obviously, the bearing capacity of precast concrete shear wall is higher than that of cast-in-place shear wall under the same condition, and the bearing capacity of the prefabricated shear wall increases more obviously with the increase of the axial compression ratios; with the decrease of aspect ratio, compared with model YZ-2, the ultimate bearing capacity of the models YZ-4 and YZ-5 is increased by 44.2% and 79%, respectively, and the initial stiffness is increased by 18.0% and 47.1%, respectively. Therefore, the bearing capacity of precast concrete shear wall becomes stronger with the decrease of aspect ratio, while the initial stiffness becomes larger gradually, and the ductility of the precast model is better than that of monolithic shear wall, and the seismic performance is basically similar. The new connection method can transfer the stress of steel bar effectively and can be used as a reliable connection way.
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