故宫石质螭首健康状况无损检测及评估预研究

发布时间：2018-01-22 04:14

本文关键词： 故宫石质文物无损检测评估风化等级安全等级　出处：《表面技术》2017年02期 　论文类型：期刊论文

【摘要】：目的通过无损检测方法评估故宫石质螭首风化和安全程度。方法首先在现场选取6个螭首进行无损检测,获取各项风化指标(表面风化程度、裂缝大致情况、孔洞、回弹强度、酥粉质量)和安全等级指标(裂缝性质、裂缝数量等具体值,超声波波速、回弹强度)。在实验室模拟风化、破损试验,建立超声波波速、回弹强度与抗折强度的曲线关系。最后通过德尔菲法建立评价体系,采用加权平均法获得各螭首的风化等级、安全等级。结果石材的抗折强度、超声波波速和回弹强度的曲线关系式为fk=0.0004V~(0.4393)R~(2.9302)。确定了6个螭首的风化程度和安全状况水平,其中构件2的表面风化程度最弱、最安全;构件6的安全情况最差,急需采取有效防范措施。结论该无损检测和健康程度评估研究方法是一种简单、快速、可量化的评价方法,其成果可用于石质文物健康状况的检测和评估工程,以获得其风化等级、安全等级,并作为文物管理决策的依据。
[Abstract]:Objective to evaluate the weathering and safety of the head of The Imperial Palace by nondestructive testing. Holes, springback strength, powder quality) and safety grade index (crack nature, crack number and other specific values, ultrasonic wave velocity, springback strength, etc.) in the laboratory simulation weathering, damage test, establish ultrasonic wave velocity. Finally, the evaluation system was established by Delphi method, and the weathering grade and safety grade of each Chi head were obtained by weighted average method. Results the bending strength of stone was obtained. The relationship between ultrasonic wave velocity and springback intensity is as follows: fktl 0.0004V ~ (0.393V) ~ (2) ~ (2) 9302 ~ (2). The weathering degree and safety level of 6 head of Chi are determined. The surface weathering degree of component 2 is the weakest and safest. The safety situation of component 6 is the worst, and it is urgent to take effective preventive measures. Conclusion the method of nondestructive testing and health assessment is a simple, rapid and quantifiable evaluation method. The results can be used to detect and evaluate the health status of stone cultural relics in order to obtain their weathering grade and safety grade, as well as as the basis for the decision of cultural relic management.
【作者单位】：北京化工大学材料科学与工程学院;材料电化学过程与技术北京市重点实验室;文物保护领域科技评价研究国家文物局重点科研基地;北京市古代建筑研究所;
【基金】：北京市科技计划(Z151100002115035)~~
【分类号】：K876.2;TB302.5
【正文快照】： Received:2016-09-23;Revised:2016-11-192.材料电化学过程与技术北京市重点实验室,北京100029;3.文物保护领域科技评价研究国家文物局重点科研基地,北京100029;4.北京市古代建筑研究所,北京100050)北京故宫被誉为世界五大宫之首,1987年被联合国科教文组织列为“世界文化遗产

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