尼龙网与铁丝加强的改性生土墙抗震性能试验研究
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摘要
为了研究采用尼龙网和直径为4.064mm的8号镀锌铁丝作为加强措施的改性生土墙体抗震性能,设计了两片采取上述加强措施的改性生土墙体试件和一片未采取上述加强措施的改性生土墙体试件,通过拟静力加载试验,对比分析了墙体试件的破坏特征、承载能力、滞回曲线及刚度退化等。研究结果表明,采用尼龙网和8号镀锌铁丝加强措施能够延迟墙体裂缝发展,增强墙体整体性能和改善墙体变形性能,使墙体的耗能能力提高,刚度退化延缓。因此,上述加强措施能有效改善生土建筑的抗震性能。
In order to study the seismic behavior of modified raw earth wall reinforced with nylon web and galvanized iron wire No.8 with diameter of 4.064 mm as strengthening measures, two modified raw earth wall reinforced specimens with the above strengthening measures and one modified raw earth wall specimen without the above measures were designed. The failure characteristics, load-carrying capacity, hysteresis loop and stiffness degradation of the specimens were compared and analyzed by quasi-static loading test. The test results indicate that the development of the cracks of the wall can be delayed, the whole performance of the wall can be strengthened and the deformation performance of the wall can be improved by using nylon web and galvanized iron wire No.8. Moreover, the energy dissipation ability of the wall can be enhanced and the stiffness degradation of the wall can be delayed. Therefore, the above strengthening measures can effectively improve the seismic behavior of raw earth buildings.
In order to study the seismic behavior of modified raw earth wall reinforced with nylon web and galvanized iron wire No.8 with diameter of 4.064 mm as strengthening measures, two modified raw earth wall reinforced specimens with the above strengthening measures and one modified raw earth wall specimen without the above measures were designed. The failure characteristics, load-carrying capacity, hysteresis loop and stiffness degradation of the specimens were compared and analyzed by quasi-static loading test. The test results indicate that the development of the cracks of the wall can be delayed, the whole performance of the wall can be strengthened and the deformation performance of the wall can be improved by using nylon web and galvanized iron wire No.8. Moreover, the energy dissipation ability of the wall can be enhanced and the stiffness degradation of the wall can be delayed. Therefore, the above strengthening measures can effectively improve the seismic behavior of raw earth buildings.
引文
[1] 王毅红,梁楗,张项英,等. 我国生土结构研究综述[J]. 土木工程学报,2015,48(5):99-107.
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[9] 张延年,顾亚洁,常萍,等. 铁丝与铁丝网加强改性生土墙的抗震试验[J]. 沈阳工业大学学报,2014,36(6):706-710.
[10] 王毅红,王春英. 生土结构的土料受压及受剪性能试验研究[J]. 西安建筑科技大学学报,2006,26(4):470-484.
[2] 刘成清,陈驰,何广杰,等. 生土建筑的抗震性能分析与评估[J]. 建筑结构,2014,44(19):68-71.
[3] 顾亚洁. 改性生土墙抗震性能试验研究[D]. 沈阳:沈阳建筑大学,2014.
[4] New Mexico earthen building materials code: NMAC2003 [S]. Santa Fe: Construction Industries Division of the Regulation and Licensing Department, 2009.
[5] STEVE BURROUGHS. Soil property criteria for rammed earth stabilization [J]. Journal of Materials in Civil Engineering,2008,20(3):264-273.
[6] MATTHEW R HALL. Assessing the environmental performance of stabilized rammed earth walls using a climatic simulation chamber [J]. Building and Environment,2007,14(2):139-145.
[7] 于文,葛学礼,朱立新. 新疆喀什老城区生土房屋模型振动台试验研究[J]. 工程抗震与加固改造,2007,29(3):24-29.
[8] 刘军,袁大鹏,周红红,等. 狗尾草对加筋土坯力学性能的影响[J]. 沈阳建筑大学学报(自然科学版),2010,26(4):720-723.
[9] 张延年,顾亚洁,常萍,等. 铁丝与铁丝网加强改性生土墙的抗震试验[J]. 沈阳工业大学学报,2014,36(6):706-710.
[10] 王毅红,王春英. 生土结构的土料受压及受剪性能试验研究[J]. 西安建筑科技大学学报,2006,26(4):470-484.