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王艷晗1 艾 軍1 張春鋒2 呂志濤3（1 南京航空航天大學(xué) 210016； 2 新汶礦業(yè)集團(tuán)公司 271219； 3 東南大學(xué) 210096）
[提要] 通過預(yù)應(yīng)力與非預(yù)應(yīng)力混凝土小型空心砌塊墻的水平低周反復(fù)荷載試驗，研究了墻片出現(xiàn)裂縫至破壞的全過程，分析了鋼筋應(yīng)變、滯回特性、骨架曲線、延性、耗能及剛度退化等問題。試驗結(jié)果表明：墻體施加預(yù)應(yīng)力后，既能較大幅度地提高其抗裂度和極限荷載，又能顯著地改善其變形、延性及耗能等性能。為預(yù)應(yīng)力混凝土砌塊結(jié)構(gòu)在抗震工程中的應(yīng)用提供了理論基礎(chǔ)。
[關(guān)鍵詞] 預(yù)應(yīng)力砌塊墻 低周反復(fù)荷載 延性 耗能 剛度Based on contrast test of prestressed and non-prestressed small-sized concrete hollow block walls under low frequency cyclic static load, the paper has studied the whole-process of cracking-failing and emphasized on the questions such as strain of reinforcing bars, characteristic of resilience, skeleton curve, ductility, energy consumption and degeneration of rigidity. The test results indicate that prestressing force not only increase walls' anti-cracking degree and load-bearing capacity, but also improve their behavior of deformation, ductility and energy consumption evidently, which provides theory bases for use of the prestressed masonry in anti-seismic engineering.
Keywords: prestressed block wall; low frequency cyclic load; ductility; energy consumption; rigidity
