HPFL加固前后空斗墙片抗侧刚度试验
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摘要
为了解空斗墙的抗震性能,对9片空斗墙墙体进行了水平低周反复荷载试验,研究了空斗墙墙体抗侧刚度及刚度退化情况,再通过9片经高性能水泥复合砂浆钢筋网薄层(High Performance Ferrocement Laminate,简称HPFL)加固修复的空斗墙墙体的水平低周反复荷载试验,对加固前后空斗墙片各个阶段的抗侧刚度进行了对比分析。试验表明,空斗墙的砌筑方式、砂浆强度和竖向压应力对墙体初始刚度有所影响,但不能明显延缓墙体刚度退化的速度;加固后的墙体极限荷载刚度均有所提高,圈梁构造柱加固所提高的幅度高于剪刀撑加固。可为研究空斗墙抗震性能提供必要理论,为寻求经济有效的加固方式提供思路。
Based on the tests of 9 rowlock cavity walls under low frequency cyclic load,the stiffness and stiffness degeneration of the walls was studied.Based on the tests of 9 rowlock cavity walls strengthened with High Performance Ferrocement Laminate(HPFL),the stiffness of the walls before and after strengthening was analyzed comparatively.Test result shows that masonry method,mortar strength and compressive stress can influence the initial stiffness but they cannot slow down the speed of the stiffness degeneration obviously.The test result also shows that the limit load stiffness of rowlock cavity walls strengthened with HPFL was improved and the ring beam column structure is better than scissor structure.The research can provide some useful theoretical basis for seismic behavior of rowlock cavity wall housing,and also provide some idea for cost-effective strengthening.key words rowlock cavity wall low-cycle loading experiment stiffness degeneration
Based on the tests of 9 rowlock cavity walls under low frequency cyclic load,the stiffness and stiffness degeneration of the walls was studied.Based on the tests of 9 rowlock cavity walls strengthened with High Performance Ferrocement Laminate(HPFL),the stiffness of the walls before and after strengthening was analyzed comparatively.Test result shows that masonry method,mortar strength and compressive stress can influence the initial stiffness but they cannot slow down the speed of the stiffness degeneration obviously.The test result also shows that the limit load stiffness of rowlock cavity walls strengthened with HPFL was improved and the ring beam column structure is better than scissor structure.The research can provide some useful theoretical basis for seismic behavior of rowlock cavity wall housing,and also provide some idea for cost-effective strengthening.key words rowlock cavity wall low-cycle loading experiment stiffness degeneration
引文
[1]蒋隆敏,张毛心.钢丝网水泥砂浆片材用于结构加固的研究综述[J].建筑结构,2004,34(3):7-10.
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[3]蒋隆敏,尚守平,黄政宇.一种适用于钢丝(丝)网水泥加固RC结构的纤维增强符合砂浆和界面剂[J].土木工程学报,2005,38(5):41-47.
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[5]梁建国,湛华,周江,等.KP1型烧结页岩粉煤灰多孔砖墙体抗震性能试验研究[J].建筑结构,2004,34(9):49-52.
[6]王正刚,薛国亚,高本立,等.约束页岩砖砌体墙抗震性能试验研究[J].东南大学学报:自然科学版,2003,33(5):113-117.
[7]郭健,何益斌,郦世平,等.基于刚度退化的框架结构受力性能研究[J].湖南大学学报:自然科学般,2007,34(5):20-23.
[8]杨松,胡五毛.砌块砌体结构抗侧移刚度的研究[J].东北电力大学学报,2007,27(6):82-86.
[9]熊立红,夏锦江.新型混凝土空心砌块房屋抗震新能研究[J].地震工程与工程振动,2003,23(3):132-137.
[10]赵彤,张晨军,谢剑.碳纤维布用于砖砌体抗震加固的试验研究[J].地震工程与工程振动,2001,21(2):89-95.
[2]尚守平,罗业雄,岳香莹,等.无机植筋在砌体中应用的试验[J].广西大学学报:自然科学版,2009,34(3):265-269.
[3]蒋隆敏,尚守平,黄政宇.一种适用于钢丝(丝)网水泥加固RC结构的纤维增强符合砂浆和界面剂[J].土木工程学报,2005,38(5):41-47.
[4]尚守平,奉杰超,刘沩,等.空斗墙墙片的拟静力试验研究[J].铁道科学与工程学报,2009,6(3):31-35.
[5]梁建国,湛华,周江,等.KP1型烧结页岩粉煤灰多孔砖墙体抗震性能试验研究[J].建筑结构,2004,34(9):49-52.
[6]王正刚,薛国亚,高本立,等.约束页岩砖砌体墙抗震性能试验研究[J].东南大学学报:自然科学版,2003,33(5):113-117.
[7]郭健,何益斌,郦世平,等.基于刚度退化的框架结构受力性能研究[J].湖南大学学报:自然科学般,2007,34(5):20-23.
[8]杨松,胡五毛.砌块砌体结构抗侧移刚度的研究[J].东北电力大学学报,2007,27(6):82-86.
[9]熊立红,夏锦江.新型混凝土空心砌块房屋抗震新能研究[J].地震工程与工程振动,2003,23(3):132-137.
[10]赵彤,张晨军,谢剑.碳纤维布用于砖砌体抗震加固的试验研究[J].地震工程与工程振动,2001,21(2):89-95.
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