基于Pushover方法的中小学砌体结构抗震性能评估
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摘要
针对中小学砌体结构教学楼的受力特点,提出横墙和开洞纵墙的等代框架模型,分析了模型的抗弯、抗剪和轴向刚度计算方法;结合国内外对钢筋混凝土结构性能水平的划分标准,将砌体结构的性能水平划分为正常使用、中等破坏和生命安全三个阶段,并通过对大量砌体墙片试验数据的统计,得出其各性能水平对应的层间位移角限值。最后利用所提模型对一砌体结构教学楼进行Pushover分析,将其实际层间位移与所提性能指标进行比较,结果表明结构在不同地震水平下均满足预定的性能目标。
The equivalent frame model of cross wall and longitudinal wall with holes are proposed based on stress characteristics of masonry structures for primary and middle school buildings,and calculation methods of bending rigidity,shear resistance and axial stiffness about the model are analyzed.Performance levels of masonry structures,combining with division standards for the levels of reinforced concrete structures at home and abroad,are divided into three levels with corresponding story drift angle limitation obtained after statistical test data as normal service,moderate damage and life safety.Push-over analysis by the proposed models are done to a masonry teaching building,and the result indicates that the structure could meet predetermined performance objective under different earthquake levels by comparison between the practical story drift and proposed performance index.
The equivalent frame model of cross wall and longitudinal wall with holes are proposed based on stress characteristics of masonry structures for primary and middle school buildings,and calculation methods of bending rigidity,shear resistance and axial stiffness about the model are analyzed.Performance levels of masonry structures,combining with division standards for the levels of reinforced concrete structures at home and abroad,are divided into three levels with corresponding story drift angle limitation obtained after statistical test data as normal service,moderate damage and life safety.Push-over analysis by the proposed models are done to a masonry teaching building,and the result indicates that the structure could meet predetermined performance objective under different earthquake levels by comparison between the practical story drift and proposed performance index.
引文
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[16]汪梦甫,周锡元.关于结构静力弹塑性分析(Push-over)方法中的几个问题[J].结构工程师,2002(4):17-22.
[17]叶燎原,潘文.结构静力弹塑性分析(push-over)的原理和计算实例[J].建筑结构学报,2000,21(1):37-51.
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[3]中国工程建设标准化协会.CECS160:2004建筑工程抗震性态设计通则(试用)[S].北京:中国计划出版社,2004.
[4]FIB.钢筋混凝土建筑结构基于位移的抗震设计[R].白绍良,译.洛桑:国际结构混凝土联合会(FIB)(原欧洲混凝土学会CEB),2003.
[5]中华人民共和国建设部.GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[6]史庆轩,易文宗,刘伯权.多孔砖砌体开窗洞纵墙片的抗震性能研究[J].世界地震工程,2000,16(2):30-34.
[7]程才渊,朱伯龙,王晓敏,等.在低周反复荷载作用下灰砂砖墙体的抗震性能[J].四川建筑科学研究,1989(3):5-9.
[8]朱伯龙,吴明舜,将志贤.在周期荷载作用下砖砌体基本性能的试验研究[J].同济大学学报,1980(2):1-14.
[9]董竟成,王有为,宋西战.多孔砖(KP_1型)建筑抗震性能的试验研究[J].建筑结构学报,1991(3):35-43.
[10]湛华.KP_1型烧结页岩粉煤灰多孔砖墙体抗震抗剪性能试验研究[D].长沙:湖南大学,2001.
[11]史庆轩,易文宗.多孔砖砌体墙片的抗震性能试验研究及抗倒塌能力分析[J].西安建筑科技大学学报,2000,32(3):271-275.
[12]易文宗,史庆轩,李建.六层大开间多孔砖砌体房屋的动力特性测试与分析[J].建筑结构,1996(3):3-10.
[13]夏敬谦,丁世文,崔际枫,等.水平配筋墙片抗震性能的试验研究[J].建筑结构,1999(6):37-40.
[14]孙雪梅,刘伟庆.大开间约束砖砌体开窗洞墙片的拟静力试验研究[J].工程抗震,2004(2):31-34.
[15]辛高伟.基于Pushover方法的砌体结构中小学建筑抗震性能评估[D].西安:西安建筑科技大学,2009.
[16]汪梦甫,周锡元.关于结构静力弹塑性分析(Push-over)方法中的几个问题[J].结构工程师,2002(4):17-22.
[17]叶燎原,潘文.结构静力弹塑性分析(push-over)的原理和计算实例[J].建筑结构学报,2000,21(1):37-51.
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