第39秦第3期 2017年6月
土水建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi;10.11835/j.issn. 1674-4764. 2017.03. 009
Vol. 39 No. 3 Jun. 2017
古代砖砌体风化性能分析及风化程度评定
汤永净la,b，赵红l°，叶真华la,1，杨玉颖c，邵振东2
(1.同济大学a.土木学院b.岩土及地下工程教育部重点实验室；c.材料学院，上海201804;
2.上海仰韶古建筑保护科技发展有限公司，上海200434）
摘要：自然界中气温、降水的长期作用导致古代砖勐体风化，风化损伤材料和勐体力学性能。实验采用大气环境实验舱实现自然风化作用人工模拟，根据不同饱水度和冻融次数，实验舱设定了7 种非饱水冻融工况，对7种工况影响下的砖、灰浆、瑚体抗压、瑚体抗剪试件试件强度变化规律进行实验分析。实验表明，饱水度是反映材料冻融性能的重要指标；不同饱水度下的冻融试件强度呈现先升后降的趋势；试件在饱水度为53%的冻融作用下，确体构件具有最佳抗力；提出古代砖体构件风化程度评定标准。实验对古砖瑚体结构保护工作具有指导和应用价值，定期评定古塔砌体风
化程度，时刻掌握古塔构件结构安全性能的变化规律，科学保护古塔。关键词：风化；风化系数；风化程；非饱水冻融；饱水度
中图分类号：TU522
文献标志码：A
文章编号：1674-4764(2017)03-0067-08
Ancientbrickmasonrybehaviorandweatheringdegreeevaluation Tang Yongjing'ab,Zhao Hongl,YeZhenhuala.b,YangYuying',Shao Zhendong
(la. College of Civil Engineering; 1b. Key Laboratory of Geotechincal and Underground Engineering(Tongji University) , Ministry of
Education; 1lc. School of Material Science and Engineering, Tongji University,Shanghai, 201804, P. R. China; 2. Shanghai
Yangshao Protection of Ancient Building Technology Development Co. , Ltd. , Shanghai 200434,P. R. China)
Abstract:During long action of temperature and precipitation, ancient brick masonries were weathered.The experiment employed an environmental chamber to simulate natural condition. seven unsaturated freeze-thaw cases were designed to treat various specimens which are brick units, mortar cube, triple masonry and prism masonry. We carried out saturation degree measurement, compressive test and shear test to the various specimens in laboratory. The resules show that the saturation degree is one key factor to effect on material freeze-thaw resistance. The strength of specimens increaseed firstly with saturation degree and decreases after a certain saturation degree. The best compressive resistance of brick, mortar, and prism masonry was when the saturation degree is about 53%. Based on the weathering coefficient and specimen mechanical behavior, we suggested the
收稿日期：2016-12-24
基金项目：国家自然科学基金（51278359)：同济大学研究生教育改革项目（2014JYJG019)
作者简介：汤永净（1965-），女副教授，博士，主要从事地下结构耐久性及古建筑结构保护研究，（E-mail）ytang@tongji.
edu.cn.
振东（通信作者），高级工程师，（E-mail）szd8199@126.com。
Received:2016-12-24
Foundation item: National Natural Science Foundation of China （No. 51278359) ; Teaching Reform of Postgraduatc
Students for Courses of Tongji University(No. 2014 YJG019)
Author brief: Tang Yongjing (1965-), associate professor, PhD, main research interests: underground structure
durability and ancient building structure preservation, (E-mail) ytang@tongji. edu. cn. Shao Zhendong (corresponding author), senior engineer, (E-mail) szd8199@126. com.
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