HPFL条带组合圈梁构造柱的空斗墙抗震性能
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摘要
针对既有空斗墙砌体结构未设置圈梁、构造柱的问题,提出采用HPFL条带加固形成组合圈梁构造柱的方法,制作了6片HPFL条带组合圈梁构造柱的空斗墙和6片对比墙体,进行水平往复荷载试验,比较各墙体的破坏形态、承载力、耗能能力、刚度退化等抗震性能指标。试验结果表明:HPFL条带组合圈梁构造柱能大幅提高空斗墙的抗震抗剪承载力,改善墙体的延性和耗能性能。基于试验结果,建立有限元分析模型,计算研究构造柱尺寸、圈梁尺寸、构造柱间距和开洞墙体构造柱设置方式等因素对空斗墙抗剪承载力的影响,提出了HPFL条带组合圈梁构造柱的设计建议。
Aiming at not considering the seismic fortification of the cavity masonry structures,a method of cavity walls with HPFL strips composite ring beam and constructional column is proposed. Six cavity walls with HPFL strips composite ring beam and constructional column and six comparative walls are tested under low cycle reversed loading to study the effect of the strengthening method. Comparison of the failure pattern,ultimate strength,skeleton curve and stiffness degradation of the strengthened and the comparative walls shows the beneficial effects of the composite ring beam and constructional column. The test results show that seismic capability,ductility and energy dissipating capability of the cavity walls with HPFL strips composite ring beam and constructional column are increased greatly. Based on finite element calculation,the various influence factors are analyzed,such as HPFL strips composite constructional column dimension,composite ring beam dimension,composite constructional column spacing and constructional column setting of cavity walls. Some specific design suggestions on HPFL strips composite ring beam and constructional column are proposed.
Aiming at not considering the seismic fortification of the cavity masonry structures,a method of cavity walls with HPFL strips composite ring beam and constructional column is proposed. Six cavity walls with HPFL strips composite ring beam and constructional column and six comparative walls are tested under low cycle reversed loading to study the effect of the strengthening method. Comparison of the failure pattern,ultimate strength,skeleton curve and stiffness degradation of the strengthened and the comparative walls shows the beneficial effects of the composite ring beam and constructional column. The test results show that seismic capability,ductility and energy dissipating capability of the cavity walls with HPFL strips composite ring beam and constructional column are increased greatly. Based on finite element calculation,the various influence factors are analyzed,such as HPFL strips composite constructional column dimension,composite ring beam dimension,composite constructional column spacing and constructional column setting of cavity walls. Some specific design suggestions on HPFL strips composite ring beam and constructional column are proposed.
引文
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[9]尚守平,唐文浩. HPFL加固多孔砖砌体抗震性能的试验研究[J].地震工程与工程振动,2012,32(5),73-80.SHANG Shouping,TANG Wenhao. Experimental investigation on seismic behavior of perforated brick masonry strengthened with HPFL[J].Earthquake Engineering and Engineering Dynamics,2012,32(5):73-80.(in Chinese)
[10] SHANG S P,HUANG X Z. Strengthening reinforced concrete structure and masonry structure with high performance ferrocement laminate(HPFL)[C]//The 2nd International Conference on Architectural Engineering and New Materials(ICAENM),2017.
[11]尚守平,雷敏. HPFL加固空斗墙抗震性能试验研究及有限元分析[J].地震工程与工程振动,2013,33(4):218-227.SHANG Shouping,LEI Min. Test study on seismic behavior and finite element analysis of row lock wall strengthened with HPFL[J]. Earthquake Engineering and Engineering Dynamics,2013,33(4):218-227.(in Chinese)
[2]朱伯龙,蒋志贤,吴明舜.外加钢筋混凝土柱提高砖混房屋抗震能力的研究[J].同济大学学报,1983,11(1):31-43.ZHU Bolong,JIANG Zhixian,WU Mingshun. A study on aseismic capacity of brick masonry buildings strengthened with reinforced concrete columns[J]. Journal of Tongji University,1983,11(1):31-43.(in Chinese)
[3]陈伯望,唐楚,邬逸夫,等.构造柱对蒸压粉煤灰多孔砖砌体抗震性能影响的试验研究[J].地震工程与工程振动,2016,36(5):116-125.CHEN Bowang,TANG Chu,WU Yifu,etc. Experimental studies on seismic behavior of autoclaved fly ash perforated brick walls with constructional columns[J]. Earthquake Engineering and Engineering Dynamics,2016,36(5):116-125.(in Chinese)
[4] Fahmy E H,Shaheen Y B I,Korany Y S. Repairing reinforced concrete columns using ferrocement laminates[J]. Journal of Ferrocement,1999,29(2):115-124.
[5] Abdulah,Katsuki Takiguchi. An investigation into the behavior and strength of Reinforced concrete columns strengthened with ferrocement jackets[J]. Cement&Concrete Composites,2003,25(2):233-242.
[6]蒋隆敏,尚守平,刘龙海.高性能水泥复合砂浆钢筋网薄层二次受力加固RC偏压柱试验及承载力计算方法研究[J].建筑结构学报,2011,32(4):72-79.JIANG Longmin,SHANG Shouping,LIU Longhai. Experimental investigation and research on calculation method of load-carrying capacity for eccentrically compressed RC columns strengthened by high performance ferrocement laminates under twice loading[J]. Journal of Building Structures,2011,32(4):72-79.(in Chinese)
[7]曾令宏,蒋朝阳. HPFL加固受火RC梁刚度及挠度研究[J].湖南大学学报:自然科学版,2017,44(5):37-43.ZENG Linghong,JIANG Chaoyang. Study on reinforced concrete beams'stiffness and deflection strengthened with high-performance ferrocement laminate after the fire[J]. Journal of Hunan University:Natural Sciences,2017,44(5):37-43.(in Chinese)
[8]吕文龙,许勇,沈朝勇,等.钢丝网复合砂浆加固受火后钢筋混凝土框架梁的抗震性能试验研究[J].地震工程与工程振动,2017,37(6):169-176.LV Wenlong,XU Yong,SHEN Chaoyong,et al. Seismic behavior of RC frame beams after fire strengthened with ferrocement[J]. Earthquake Engineering and Engineering Dynamics,2017,37(6):169-176.(in Chinese)
[9]尚守平,唐文浩. HPFL加固多孔砖砌体抗震性能的试验研究[J].地震工程与工程振动,2012,32(5),73-80.SHANG Shouping,TANG Wenhao. Experimental investigation on seismic behavior of perforated brick masonry strengthened with HPFL[J].Earthquake Engineering and Engineering Dynamics,2012,32(5):73-80.(in Chinese)
[10] SHANG S P,HUANG X Z. Strengthening reinforced concrete structure and masonry structure with high performance ferrocement laminate(HPFL)[C]//The 2nd International Conference on Architectural Engineering and New Materials(ICAENM),2017.
[11]尚守平,雷敏. HPFL加固空斗墙抗震性能试验研究及有限元分析[J].地震工程与工程振动,2013,33(4):218-227.SHANG Shouping,LEI Min. Test study on seismic behavior and finite element analysis of row lock wall strengthened with HPFL[J]. Earthquake Engineering and Engineering Dynamics,2013,33(4):218-227.(in Chinese)