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劉立新，  王莉荔
(鄭州大學(xué)土木工程學(xué)院，鄭州450002)

[摘要] 通過對(duì)2種(72個(gè))不同機(jī)械錨固方式的熱軋帶肋鋼筋與混凝土試件的拔出試驗(yàn)，對(duì)帶肋鋼筋機(jī)械錨固方式與混凝土的粘結(jié)錨固強(qiáng)度、破壞形態(tài)以及影響粘結(jié)錨固強(qiáng)度的因素如混凝土強(qiáng)度、錨固長(zhǎng)度、鋼筋直徑、保護(hù)層厚度、配箍率等進(jìn)行了分析。試驗(yàn)研究表明，采用機(jī)械錨固方式能夠提高帶肋鋼筋與混凝土之間的粘結(jié)錨固強(qiáng)度，減少粘結(jié)滑移量，有效減小錨固長(zhǎng)度。在統(tǒng)計(jì)回歸的基礎(chǔ)上提出采用機(jī)械錨固方式的粘結(jié)錨固強(qiáng)度計(jì)算公式，為我國(guó)現(xiàn)行混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范進(jìn)一步修訂時(shí)列入機(jī)械錨固方式提供了參考依據(jù)。
[關(guān)鍵詞] 粘結(jié)錨固性能；機(jī)械錨固；錨固長(zhǎng)度

Experimental Study on Bond-anchorage Behavior of Hot-rolled Ribbed Bars in Concrete with Mechanical Anchorage Measure
Liu Lixin, Wang Lili
( Civil Engineering College of Zhengzhou University,  Zhengzhou 450002,  China)

Abstract: Based on the pull-out test results of 2 groups (72 specimens)  of hot-rolled ribbed bars with different mechanical anchorage measure in end of the bars, the bond-anchorage strength and the broken phenoruenon of hot-rolled ribbed bars in concrete with mechanical anchorage measure are discussed, the main factors that affect the bond-anchorage strength such as the strength of concrete, the diameter of bars, the development length of bars, the cover thickness of concrete and the transverse steel ratio are analyzed. The test results show that the bond-anchorage strength can be improved, and the development length of deformed steel bars can be decreased with the mechanical anchorage measure in engineering. The empirical formulas for bond-anchorage strength of hot-rolled ribbed bars with the mechanical anchorage measure are suggested, and this may be as a reference for future revision of the Chinese Design Code.
Keywords: bond-anchorage behavior; mechanical anchorage measure; development length