磨筋法与钻孔法推算混凝土构件配筋实际应力的比较研究
Comparative Study on Abrasion Method & Drilling Method to Estimate Actual Stress of Steel Bars Embedded in Reinforced Concrete Building Members

作者: 潘 立 :中国建筑科学研究院建筑结构研究所,北京;

关键词: 磨筋法钻孔法构件配筋实际应力补充实测变量弹性解析推算组合应力预应力效应Abrasion Method Drilling Method Actual Stress of Steel Bars Embedded in Concrete Members Supplementary Measured Variable Analytical Estimation in Elastic Range Combined Stress Prestress Efficiency

摘要:
既有建筑结构的安全评估、质量鉴定、加固改造,事故分析常需准确推算混凝土构件中纵筋的实际应力,依此估算构件实际内力,但目前混凝土结构检测鉴定极少能涉及或提供这些数据。磨筋法与钻孔法是作者近年首次提出的推算混凝土构件配筋实际应力的两种实用方法,均基于弹性分析结合常规检测计算求解(补充实测变量的解析计算),多项模拟试验表明其精度满足工程需要。介绍了两种方法并进行了比较与分析,证明了两者的内在联系及其一致性,结果可供混凝土结构检测鉴定与同类研究参考。分析表明,基于相同原理,经进一步改进测试工艺与精度,钻孔法还可拓展用于推算超长混凝土结构实际组合应力(含温度应力),及混凝土结构中实际预应力效应。

Abstract:
In security assessment, quality assurance, retrofitting and accident analysis for reinforced concrete structures, it is often needed to estimate the actual stress of longitudinal steel bars embedded in members, then as the basis, to estimate the actual internal forces of those members, but detection and identification now about existent concrete structures can hardly provide these dates. Abrasion Method and Drilling Method are the two practical ways proposed in recent years by author, which are based on elastic analysis and routine testing (analytical calculation of supplementary measured variable), and the accuracy meets engineering needs by application test verifications in past. In this paper, the two methods are introduced and comparatively analyzed, the intrinsic link and consistency between these two are proved as the reference for detection, identification and similar studies of reinforced concrete structures. Based on the same principle and further improvement of the test process and the accuracy, Drilling Method can also be used to estimate the combined stress (including temperature stress) in super-long concrete structures and the prestress efficiency in prestressed concrete structures.

文章引用: 潘 立 (2014) 磨筋法与钻孔法推算混凝土构件配筋实际应力的比较研究。 土木工程, 3, 31-39. doi: 10.12677/HJCE.2014.32004

参考文献

[1] GB/T 50344-2004 (2004) 建筑结构检测技术标准. 中国建筑工业出版社, 北京.

[2] 潘立 (1991) 建筑结构中钢筋实际应力测定的新方法. 工业建筑, 9, 28-29.

[3] 潘立, 李志文, 曾银枝 (2011) 确定混凝土构件实际应力技术方法的研究,国家住房和城乡建设部研究开发项目(No.20091902420730006). 建筑科学研究报告, 中国建筑科学研究院建筑结构研究所, 北京.

[4] 李志文, 潘立 (2010) 确定混凝土构件钢筋实际应力新方法的试验研究. 工程抗震与加固改造, 1, 79-84.

[5] GB 50010-2010 (2010) 混凝土结构设计规范. 中国建筑工业出版社, 北京.

分享
Top