建筑幕墙中石材弯曲强度测试及评定方法研究  

Research on Flexural Strength Test Techniques and Computing Method of Dimension Stones in Building Curtain Walls

作　　者：陈灏恺 刘军进 李建辉[1] 梁云东[1] 

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《建筑科学》2015年第11期16-21,共6页Building Science

基　　金：国家"十二五"科技支撑计划课题(2012BAJ07B04)

摘　　要：建筑幕墙中的天然石材属于脆性材料,其强度具有较大的离散性。为了提高幕墙石材强度测试可靠性,本文总结了我国、美国、欧洲规范中关于石材弯曲强度测试和评定方法的差异,利用蒙特卡洛模拟法讨论了不同样本统计量作为石材弯曲强度代表值的优缺点,基于大量花岗岩实测数据对比分析了石材弯曲强度采用不同统计量的差异。提出了假设石材弯曲强度服从对数正态分布,并以标准值评判石材强度是否合格的方法,可为我国《金属与石材幕墙工程技术规范》修订提供技术参考。Dimension stone used in building curtain walls is a kind of brittle materials. There is great variation in means and variances of strength among different stones. In order to enhance the reliability in test method of dimension stone strength, the differences of test techniques and computing methods for proper stone strength value in China, America and Europe codes are summarized. It is discussed that representative value could express a more accurate and informing strength of stones using Monte Carlo Simulation. Based on big amount tests of granites, different representative values of flexural strength are compared and analyzed. A new way which assumes stone strength following lognormal distribution and takes nominal value as judgment criteria to test the stone strength is suggested for code JGJ 133.

关 键 词：石材幕墙 弯曲强度 静载试验 花岗岩 离散性 测试方法 

分 类 号：TU521.2[建筑科学—建筑技术科学]