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【提要】  破損構(gòu)件承載力計算是鋼筋混凝土結(jié)構(gòu)耐久性評估的關(guān)鍵問題。對6塊從工業(yè)廠房中拆卸的大型屋面板進行試驗研究，試驗和理論分析結(jié)果表明，構(gòu)件破損程度對板的承載力有明顯影響，銹蝕鋼筋的力學性能退化及由此引起的鋼筋和混凝土之間粘結(jié)性能的退化是承載力下降的內(nèi)在原因。立足于現(xiàn)行規(guī)范的承載力計算公式，提出了破損屋面板受彎承載力計算模型。
【關(guān)鍵詞】  破損大型屋面板  受彎承載力  系數(shù)  試驗
Experimental Study on Bending Capacity of Largesize Ribbed Roof Slabs in Disrepair/Lin Shizhu 1，3，Li Yanfei2，Zhao Gentian3（1 Civil Engineering School，Xian University of Architecture and Technology，Xian 710055，China； 2 Shandong Water Polytechnic，Rizhao 276826，China；3 Architecture and Civil Engineering School，UST Inner Mongolia，Baotou 014010，China）
Abstract:Calculation of bearing capacity of members in disrepair is the key of evaluating the durability of reinforced concrete structures. Six largesize ribbed roof slabs in disrepair are tested. The experiment and rational analysis results show that，the damage of members has effect on the bearing capacity of slabs，and the deterioration of mechanical properties of corroded reinforcement and bond behavior with concrete result in the reduction of capacity. Based on the formulas of bearing capacity of the code，the calculating model of bending capacity of roof slabs in disrepair is proposed.
Keywords:largesize ribbed roof slab in disrepair；bending capacity；factors；test
1）西安建筑科技大學土木工程學院，710055；2）山東水利職業(yè)學院，日照，276826；3）內(nèi)蒙古科技大學建筑與土木工程學院，包頭，014010。
*內(nèi)蒙古自治區(qū)自然科學基金資助項目（2001090213）。