Seismic performance of precast RC and RC/ECC composite columns with grouted sleeve connections
Seismic performance of precast RC and RC/ECC composite columns with grouted sleeve connections
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DOI：
10.1016/j.engstruct.2019.03.022
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发表时间：
2019-06
影响因子：
5.5
通讯作者：
L. Xu;Jinlong Pan;Jingming Cai
中科院分区：
文献类型：
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作者：
L. Xu;Jinlong Pan;Jingming Cai
灌浆套管连接通常应用于预制柱，以提高施工效率。本文提出了一种灌浆套筒连接的预制RC/ECC组合柱，通过在柱的塑性铰区用ECC代替混凝土来提高其抗震性能。对预制 RC 柱、预制 RC/ECC 复合柱和现浇 RC 柱施加循环荷载，比较其抗震性能。根据测试结果，两种预制柱均表现出与现浇钢筋混凝土柱相似的延性和承载能力。预制RC/ECC组合柱比预制RC柱和现浇柱表现出更好的耗能能力和更好的抗损伤能力。因此，在预制柱塑性铰区应用ECC可以有效增强其抗震性能。
Grouted Sleeve Connections are commonly applied in precast columns for enhanced construction efficiency. In this paper, a precast RC/ECC composite column with grouted sleeve connections was proposed by substituting concrete with ECC in the plastic hinge zone of columns to improve its seismic performance. Cyclic loading was applied to a precast RC column, a precast RC/ECC composite column and a cast-in-place RC column to compare their seismic performance. According to the test results, both the two precast columns show a similar ductility and load-carrying capacity as the cast-in-place RC column. The precast RC/ECC composite column shows a better energy dissipation capacity and a better damage resistance than the precast RC column and the cast-in-place column. Therefore, application of ECC in the plastic hinge zone of precast column can effectively enhance its seismic performance.