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配置HRB500E,HRB600钢筋的混凝土圆柱抗震性能试验

Keywords: 桥梁工程,抗震性能,拟静力试验,高强度钢筋,圆形混凝土柱

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Abstract:

?为了研究高强度钢筋对试件抗震性能的影响,对11个配置HRB335,HRB500E,HRB600钢筋的混凝土圆形柱进行了水平低周反复荷载作用下的拟静力试验。对比分析钢筋等体积代换和等强度代换时,纵筋强度、箍筋强度、箍筋间距、混凝土强度等因素对试件破坏机理、抗弯承载力、耗能能力的影响及位移延性等对抗震性能的影响。研究结果表明:采用不同强度钢筋时,试件均为典型的弯曲破坏,墩底形成塑性铰,纵筋断裂;钢筋等体积代换时,纵筋强度对试件承载力、变形能力和总耗能能力影响较大,箍筋强度影响较小;等强度代换时,试件抗震性能基本保持不变,采用高强钢筋可以减小钢筋用量;箍筋间距增大时,箍筋对纵筋约束减小,试件变形能力和耗能能力减弱;混凝土强度对试件抗震性能影响较小。

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