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(中國(guó)建筑科學(xué)研究院建筑結(jié)構(gòu)研究所， 北京 100013)

［摘要］結(jié)合理論分析與現(xiàn)場(chǎng)檢測(cè)，將近年提出的“配筋鉆孔法”用于推算既有鋼筋混凝土結(jié)構(gòu)中承重構(gòu)件的實(shí)際內(nèi)力，能較好滿足建筑結(jié)構(gòu)的安全鑒定、加固改造、事故分析等相關(guān)需求。為便于業(yè)內(nèi)同行理解、應(yīng)用、改進(jìn)此方法，確保其實(shí)際應(yīng)用時(shí)推算精度滿足工程要求，以此進(jìn)一步拓展現(xiàn)有混凝土結(jié)構(gòu)檢測(cè)鑒定范圍（含預(yù)應(yīng)力及溫度荷載效應(yīng)），基于已有研究和雙向偏壓混凝土框架柱實(shí)測(cè)數(shù)據(jù)，詳述了配筋鉆孔法推算柱截面實(shí)際內(nèi)力的過(guò)程，分析了推算結(jié)果，并對(duì)以后類似研究和應(yīng)用提出了實(shí)用建議。

［關(guān)鍵詞］配筋鉆孔法；  構(gòu)件實(shí)際內(nèi)力； 鋼筋鉆孔與擴(kuò)孔； 測(cè)孔周邊應(yīng)變?cè)隽浚?推算精度

中圖分類號(hào)：TU375, TU378文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)03-0057-04

Example for calculating actual internal forces of  concrete members by Hole Method of Reinforcement

Pan Li

（Institute of Building Structures, China Academy of Building Research, Beijing 100013, China）

Abstract:Combined with the theoretical analysis and  the field test, Hole Method of Reinforcement which was proposed  in recent years can be used preferably to calculate actual internal forces in bearing members in existing reinforced concrete, which better meets the need of structural safety identification, reinforcement and reconstruction, and accident analysis etc. In order to help industry peers to understand, use  and  improve the method, to ensure calculation accuracy when the method is used to meet engineering requirements, so to further expand the existing range of concrete structure detection and identification (including effects from prestressing or temperature), based on the existing study and  known measured data of a reinforced concrete column loaded in two-way eccentric compression, the calculation process by the method for actual internal forces of the column was shown in detail, the calculation result was analyzed, then relevant practical recommendations are suggested which may be useful to similar researches and applications in later.

Keywords:Hole Method of Reinforcement;  actual internal force in member; drill then enlarge a  hole on  reinforcement; strain increment in bars near the measuring hole; calculation accuracy