新型石膏混凝土复合墙板地震损伤模型研究  

Seismic damage model for new typegypsum concrete composite walls

作　　者：祁子洋[1] 姜南[1] 王龙[1] 马少春[1] 

机构地区：[1]天津大学建筑工程学院滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《振动与冲击》2016年第19期181-188,共8页Journal of Vibration and Shock

基　　金：住房和城乡建设部科学技术项目(2013-R4-25);天津市城乡建设与交通委员会科技项目(2011-1458)

摘　　要：在低周反复加载试验的基础上,对新型石膏混凝土复合墙板进行地震损伤模型研究。在具有垂直孔腔的石膏板肋上沿墙高方向隔一定高度设置水平孔腔,灌注混凝土后形成密柱与梁格构形式的新型石膏混凝土复合墙板。进行了四块新型复合材料墙板的低周反复加载试验,得到新型石膏混凝土复合材料墙板试件的破坏特征、滞回特性、承载能力等抗震性能。依据试验特点,在Park模型及其改进模型的基础上,提出一种不依赖于单调加载试验结果的损伤模型,并考虑了墙体开裂的因素。通过试验结果对比表明,该模型能准确描绘试件损伤的发展历程,对新型石膏混凝土复合墙板试件具有较强的适用性,损伤指标对于开裂位移敏感性较低。研究同样表明,文中提出的新模型对于其他类型的混凝土试件仍能给出较合理的损伤指标。Seismic damage model for a new type of gypsum concrete composite walls was studied based on low cycles repeated loading tests. Horizontal holes were set with certain heights along the high direction of a plaster board with vertical holes already to constitute a new form of gypsum concrete composite wall with a lattice type of dense columns and beams after pouring concrete. Low cycles repeated loading tests of four gypsum concrete composite walls were conducted to obtain their aseismic performances, such as, damage characteristics, hysteretic behavior, force-bearing capacity and so on. According to test characteristics, a new damage model was proposed based on Park model and its improved model. The new damage model was independent on monotonic loading test results ans considered wall cracking factors. Through comparing test results, it was shown that the new model can accurately describe the damage development of specimens; it not only has a stronger applicability for the new type of gypsum concrete composite walls but also has a low sensitivity to cracking displacements; the new model can give a more reasonable damage index for other types of concrete structures.

关 键 词：石膏 混凝土 复合墙板 损伤模型 变形 耗能 

分 类 号：TU375.2[建筑科学—结构工程] TU317.1