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工程科学与技术:2018,50(5):110-121
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装配式圈梁构造柱约束蒸压粉煤灰砖墙体抗震性能分析
(西安建筑科技大学 土木工程学院, 陕西 西安 710055)
Study on the Seismic Performance of Autoclaved Fly Ash Brick Masonry Walls Restrained by Assembly Ring Beam and Construction Column
(School of Civil Eng. Xi'an Univ. of Architecture and Technol., Xi'an 710055, China)
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投稿时间:2017-12-17    修订日期:2018-04-24
中文摘要: 为解决砖砌体结构抗震设防水平低、墙体材料能耗大及构造措施不规范等缺点,提出适用于砌体建筑的新型装配式蒸压粉煤灰砖墙体结构型式。首先构造了4类新型装配式配筋砌块(构造柱砌块、圈梁砌块、清扫砌块和半砖砌块),其优点是作为墙体材料的同时可以兼做施工模板,从而满足无模板化施工工艺要求;然后进行了蒸压粉煤灰砖砌体短柱轴心受压试验,分析其破坏形态和变形特征并得到抗压强度、弹性模量和应力-应变曲线等本构参数;采用数值模拟的方法从极限承载力、刚度退化和延性等3个方面,对装配式圈梁构造柱约束的蒸压粉煤灰砖墙体抗震性能进行分析,结果发现:本文提出的蒸压粉煤灰砖受压本构模型形式简单且与试验数据吻合较好;装配式圈梁构造柱与现浇圈梁构造柱对普通砌体墙体和蒸压粉煤灰砖砌体墙体的抗震性能具有显著提升作用,两种构造措施对墙体承载力和刚度的影响规律相近,且装配式构造措施约束墙体的延性优于现浇构造措施约束墙体;蒸压粉煤灰砖墙体承载力较大且抗震性能优于普通砖墙体,两种墙体的延性和刚度退化率等力学性能较为接近;本文提出的装配式圈梁构造柱约束蒸压粉煤灰砖墙体的施工工艺简便且适用范围更广泛。研究成果对于解决传统砌体建筑施工及抗震中存在的问题并拓展蒸压粉煤灰的应用具有重要借鉴意义和参考价值。
Abstract:In order to solve the brick masonry structures' problems such as the low level of earthquake fortification, non-standard construction and energy-wasting features of wall materials in masonry structures, a new-type assembly autoclaved fly ash brick masonry walls suitable for masonry building was proposed . Firstly, four new-type assembly reinforced concrete blocks including tie column block, ring beam block cleaning block and half brick block were constructed, which have the advantages that they can be used as both wall material and formwork, so as to meet the requirement of no-template construction process. Secondly, the axial compression test of autoclaved fly ash brick short columns was carried out to analyze the failure mode and deformation characteristics and the constitutive parameters such as compressive strength, elastic modulus and stress-strain curves were obtain. Finally, the seismic performance of assembly autoclaved fly ash wall restrained by ring beam and construction column was analyzed by numerical simulation method from three aspects-ultimate bearing capacity, stiffness degradation and displacement ductility. The results showed that this autoclaved fly ash brick's constitutive relationship has a simple form, and is in good agreement with the test data. The constructional column and ring beam under prefabricated construction measures and cast-in-situ construction measures have influence on the seismic performance of the common brick masonry wall and autoclaved fly ash brick masonry wall. The bearing capacity and stiffness value of the assembly masonry walls and the cast-in-place masonry walls are no different. But the displacement ductility of the assembly masonry walls is better than that of the cast-in-place masonry wall. The stiffness degradation rate and displacement ductility of autoclaved fly ash brick walls are similar to that of the common brick masonry walls. But the bearing capacity of the autoclaved fly ash brick walls is larger than that of the common brick masonry walls. And the assembly autoclaved fly ash brick masonry wall has better seismic performance than the common brick masonry wall. The new-type masonry structure is simple and widely applicable. The research results can solve the main problems faced by masonry structures and are beneficial for autoclaved fly ash to be used in masonry buildings.
文章编号:201701068     中图分类号:TU362;TU398+.5    文献标志码:
基金项目:国家自然科学基金资助项目(51590914;51578450);陕西省建设科技计划资助项目(2015-K145);创新团队发展计划资助项目(IRT_17R84)
作者简介:文波(1975-),女,教授,博士.研究方向:工程的抗震和结构抗火.E-mail:wenbo_mail@163.com
引用文本:
文波,张路,牛荻涛,罗大明.装配式圈梁构造柱约束蒸压粉煤灰砖墙体抗震性能分析[J].工程科学与技术,2018,50(5):110-121.
WEN Bo,ZHANG Lu,NIU Ditao,LUO Daming.Study on the Seismic Performance of Autoclaved Fly Ash Brick Masonry Walls Restrained by Assembly Ring Beam and Construction Column[J].Advanced Engineering Sciences,2018,50(5):110-121.