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工程科学与技术:2023,55(1):232-242
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ECC-XPS夹心复合墙板界面黏结性能试验
(1.中国矿业大学 江苏省土木工程环境灾变与结构可靠性重点试验室,江苏 徐州 221116;2.中国矿业大学 深部岩土力学与地下工程国家重点试验室,江苏 徐州 221116;3.浙江大学 建筑工程学院,浙江 杭州 310058;4.山西五建集团有限公司,山西 太原 030013)
Experiment on Interface Bonding Performance of ECC-XPS Sandwich Composite Wallboard
(1.Jiangsu Key Lab. of Environmental Impact and Structural Safety in Eng., China Univ. of Mining and Technol., Xuzhou 221116, China;2.State Key Lab. for Geomechanics & Deep Underground Eng., China Univ. of Mining and Technol., Xuzhou 221116, China;3.College of Civil Eng. and Architecture, Zhejiang Univ., Hangzhou 310058, China;4.Shanxi Wujian Group Co. Ltd., Taiyuan 030013, China)
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投稿时间:2022-04-15    修订日期:2022-05-26
中文摘要: 因建筑外围护结构面层开裂脱落导致保温隔热性能下降,从而引起建筑能耗大等问题已经受到了广泛关注,并且现存的外墙保温方法难以保证墙体具有与建筑同样的寿命。基于此,本文提出了一种以工程水泥基复合材料(ECC)作为饰面层和结构层、挤塑聚苯乙烯(XPS)保温板作为保温层的夹心复合墙板,并对其进行了双面剪切试验。在此基础上,分析各类试件的破坏模式,研究制作方式、保温层厚度、连接件及玄武岩纤维增强聚合物(BFRP)连接件角度对ECC-XPS夹心复合墙板界面黏结性能的影响。结果表明:预制试件的黏结性能最差,约为现浇试件的1/3;随着保温层厚度的增加,试件的抗剪承载力和延性降低,并且试件的厚度越大,其抗剪承载力和延性降低的幅度越大;连接件的存在能够有效提高试件的抗剪承载力和延性,还会改变试件的破坏模式;减小连接件的嵌入角度有助于增大试件的抗剪承载力,但会降低试件的延性,还会导致破坏模式发生改变。为了评估ECC-XPS夹心保温墙板达到峰值荷载后的耗能能力,对各类试件进行了韧性分析,发现在墙板中设置一定的连接件能够有效提高试件的耗能能力,并且设置90°连接件对耗能能力的提升最明显,同时预制试件的耗能能力最差。根据试验结果对抗剪承载力计算公式进行修正。研究为ECC-XPS夹心复合墙板在实际工程中的应用奠定了基础。
Abstract:At present, due to the cracking and falling off of the decorative layer of the building envelope, the problem of building energy consumption caused by the decline of building thermal insulation performance has been widely concerned. It is difficult to ensure that the wall has the same life as the building in the existing thermal insulation practices for exterior walls. The double shear test was carried out on a proposed sandwich composite wallboard with engineering cement-based composite (ECC) as the decorative layer and structural layer as well as extruded polystyrene (XPS) insulation board as the thermal insulation layer. On this basis, the failure modes of various specimens as well as the effects of the fabrication method, insulation layer thickness, connection, and the angle of basalt fiber reinforced polymer (BFRP) connection on the interface bond performance of ECC-XPS sandwich composite wallboard were studied. The results showed that the prefabricated specimens were of the worst bond performance, which was about 1/3 of that of the cast-in-place specimens. With the increase of insulation thickness, the shear strength and ductility of specimens decreased, and the decreased amplitude increased with the increase of thickness. The existence of connectors caused the improvement of the shear capacity and ductility of the specimen, as well as the change of the failure mode; Reducing the embedding angle of the connectors resulted in the improvement of the shear bearing capacity of the specimen, the reduction of ductility, and the change of failure mode. Toughness analysis was carried out on various specimens to evaluate the energy dissipation capacity of ECC-XPS sandwich insulation wall panels after reaching peak load. It was found that it could effectively improve the energy dissipation capacity of the specimen by setting a certain connector in the wall panel, and the specimens with 90° connector were of the most obvious improvement on the energy dissipation capacity, while the prefabricated specimens were of the worst energy dissipation capacity. In addition, based on the test results, the calculation formula of shear capacity proposed previously was revised. This study lays a foundation for the application of ECC-XPS sandwich composite wallboard in engineering practice.
文章编号:202200339     中图分类号:TU528.58    文献标志码:
基金项目:徐州市重点研发计划(KC18106)
作者简介:第一作者:李雨珊(1999-),女,硕士生.研究方向:新型土木工程材料.E-mail:1597332540@qq.com;通信作者:尹世平,教授.E-mail:yinshiping2821@163.com
引用文本:
李雨珊,尹世平,徐世烺,侯向明,王宇清,李传秀.ECC-XPS夹心复合墙板界面黏结性能试验[J].工程科学与技术,2023,55(1):232-242.
LI Yushan,YIN Shiping,XU Shilang,HOU Xiangming,WANG Yuqing,LI Chuanxiu.Experiment on Interface Bonding Performance of ECC-XPS Sandwich Composite Wallboard[J].Advanced Engineering Sciences,2023,55(1):232-242.