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首页> 外文会议>World conference on earthquake engineering;WCEE >SEISMIC RETROFITTING OF COLUMNS WITH LAP-SPLICES VIA RCJACKETS
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SEISMIC RETROFITTING OF COLUMNS WITH LAP-SPLICES VIA RCJACKETS

机译：通过RC夹克对带有搭接片的柱进行地震修复

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摘要

The effectiveness of RC jackets for seismic retrofitting of rectangular columns with poor detailing, and inparticular with lap splicing of bars at floor level, was investigated. Four cantilever columns with smoothbars and hooked ends and another 3 with ribbed bars and straight ends, were cyclically tested to failure,after jacketing. The tests of companion unretrofitted columns show that, for smooth bars with hookedends, the low deformation capacity and energy dissipation does not depend on lapping length - at least forlapping as short as 15 bar-diameters. Unretrofitted columns with straight ribbed bars exhibit a remarkableloss of deformation capacity and energy dissipation with decreasing lap length, below 45 bar-diameters.RC jacketing of columns with smooth bars and hooked ends is very effective in increasing their resistance,cyclic deformation capacity and energy dissipation to levels sufficient for earthquake resistantconstruction and to those of a monolithic column without lap splicing. In columns with straight ribbedbars RC jacketing cannot fully re-instate cyclic deformation capacity and energy dissipation to that of amonolithic column, if the original column has very short lapping, e.g. in the order of 15 bar-diameters.
机译：研究了RC护套对细节较差的矩形柱（特别是在地板上搭接钢筋）进行抗震加固的有效性。夹套后，对四根带有光滑杆和带钩端部的悬臂柱以及另外三根带有肋杆和直端部的悬臂柱进行了循环测试，以检查是否失效。配套的未翻新立柱的测试表明，对于带有钩形末端的光杆，低变形能力和能量耗散不依赖于搭接长度-至少搭接短至15巴直径。未加固的带直肋筋的立柱在小于45巴直径的情况下，随着减小的搭接长度，会显着降低变形能力和耗能达到足以抗震施工的水平，并且达到不带搭接的整体柱的水平。如果原始色谱柱的研磨时间很短，例如RC护套，则带有直肋筋的色谱柱的RC护套无法完全恢复单块色谱柱的循环变形能力和能量耗散。大约为15 bar直径。

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