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首页> 外文期刊>Journal of bridge engineering >Effects of Partial-Design-Strength Concrete on the Seismic Performance of Concrete-Filled Tube Columns in Accelerated Bridge Construction
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Effects of Partial-Design-Strength Concrete on the Seismic Performance of Concrete-Filled Tube Columns in Accelerated Bridge Construction

机译：部分设计强度混凝土对加速桥梁施工中钢管混凝土柱抗震性能的影响

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This study evaluated the seismic performance of circular concrete-filled tube (CCFT) columns in accelerated bridge construction (ABC). In these projects, the bridge should be open to service after a couple of days. For this reason, this study evaluated the ability of CCFT columns to perform adequately under gravitational and seismic loading before the concrete reached its design strength at 28 days. A reduced seismic hazard that accounted for this temporal condition was implemented, and a performance evaluation was performed to obtain the CCFT column probability of failure. The performance of a CCFT column was compared with that of a circular reinforced concrete (RC) column of a Caltrans bridge. Probabilistic analyses using reduced seismic loads for the temporary condition indicated that CCFT columns with partial design concrete compressive strength can be used for ABC without resulting in an increased probability of failure. (C) 2016 American Society of Civil Engineers.
机译：这项研究评估了圆形混凝土填充管柱（CCFT）在加速桥梁施工（ABC）中的抗震性能。在这些项目中，桥梁应在几天后开放使用。因此，本研究评估了CCFT柱在重力和地震荷载作用下在28天达到其设计强度之前的性能。实现了一种减少了这种时间条件的地震危险，并进行了性能评估以获得CCFT色谱柱失效的可能性。将CCFT柱的性能与Caltrans桥的圆形钢筋混凝土（RC）柱的性能进行了比较。在临时情况下使用减少的地震荷载进行的概率分析表明，具有部分设计混凝土抗压强度的CCFT柱可用于ABC，而不会增加失败的可能性。 （C）2016年美国土木工程师学会。

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