回弹法推定砌体中烧结普通砖强度等级的研究

Research on the Evaluation of Strength for Fired Common Brick in Existing Masonry Structures in Rebound Method

针对目前烧结普通砖回弹法的相关国家标准和行业标准在工程应用中存在的检测精度低、应用范围受限和被错误引用等问题,通过对比研究4部现行标准并运用数理统计方法,提出了回弹法检测砌体中烧结普通砖抗压强度的统一测强公式,并对砌体中烧结普通砖的回弹法作出了统一规定.经国标GB 50315编制组组织的验证性考核试验,证明该回弹测强公式的检测精度较高.本文的研究成果对砌体工程的现场检测工作具有参考价值,为GB 50315的修订提供了重要依据.

There are many problems in the engineering application of the current national standard and industrial standard of the rebound method for fired common brick, for instance, low accuracy, limitation of application and errors in citation. Based on the comparison of rebound testing method provided in 4 exist- ing standards and on the mathematical statistical method, a general formula of the strength calculation for fired common brick in existing masonry was proposed, and the uniform provisions concerning the application of this method were made. The high accuracy of the general formula of strength calculation has been verified in the test organized by the Committee of National Standard GB 50315. The research will have reference value for site testing of masonry engineering, and will provide an important basis for the revision of the national standard GB 50315.