带软钢阻尼器的自复位装配式混凝土框架节点抗震性能研究
摘要：为摆脱目前装配整体式混凝土框架“等同现浇”的固有模式，结合传统预应力自复位混凝土框架的优越性，提出一种带软钢阻尼器的自复位装配式混凝土(SCPCHD)框架。利用ABQUAS有限元软件分别建立新型自复位SCPCHD框架、传统预应力自复位装配式混凝土(SCPC)框架和现浇钢筋混凝土(RC)框架的精细化三维实体数值分析模型，从而验证新型SCPCHD框架良好的抗震性能和耗能能力。分析结果表明：SCPCHD框架残余变形很小、具有震后恢复性能好的优点；SCPCHD框架的层间位移响应明显小于SCPC框架，与现浇RC框架基本接近，且结构构件塑性损伤小；罕遇地震下SCPCHD梁柱节点的耗能分别为传统预应力SCPC框架和现浇RC框架节点耗能的2.26倍和3.64倍，表明新型节点耗能能力好。
关键词：自复位；软钢阻尼器；三维实体；耗能能力；塑性损伤
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[2] 唐九如.钢筋混凝土框架节点抗震[M].南京：东南大学出版社，1989.
[3] 张瀑，鲁兆红，淡浩.汶川地震中预制装配整体结构的震害调查分析[J].四川建筑科学研究，2010,36(3):129-133.
[4] KUROSAWA R,SAKATA H,QU Z,et al.Precast prestressed concrete frames for seismically retrofitting existing RC frames[J].Engineering Structures,2019,184:345-354.
[5] HUANG L J,ZHOU Z,HUANG X G,et al.Variable friction damped self-centering precast concrete beam-column connections with hidden corbels:experimental investigation and theoretical analysis[J].Engineering Structures,2020,206:110150.
[6] WANG H S,MARINO E M,PAN P.Design,testing and finite element analysis of an improved precast prestressed beam-to-column joint[J].Engineering Structures,2019,199:109661.
[7] WANG H S,MARINO E M,PAN P,et al.Experimental study of a novel precast prestressed reinforced concrete beam-to-column joint[J].Engineering Structures,2018,156:68-81.
[8] KOSHIKAWA T.Moment and energy dissipation capacities of post-tensioned precast concrete connections employing a friction device[J].Engineering Structures,2017,138:170-180.
[9] SONG L L,GUO T,CHEN C.Experimental and numerical study of a self-centering prestressed concrete moment resisting frame connection with bolted web friction devices[J].Earthquake Engineering & Structural Dynamics,2014,43(4):529-545.
[10] HUANG Y,KANG T H K.Modeling of sliding behavior of unbonded Tendons in post-tensioned concrete members[J].ACI Structural Journal,2018,115(4)1153-1164.
[11] 建筑抗震设计规范：GB 50011—2010[S].北京：中国建筑工业出版社，2010.
[12] GUARRACINO F,WALKER A.Energy methods in Structural mechanics:a comprehensive introduction to matrix and finite element methods of analysis[M].London:Thomas Telford Publishing,1999.
[13] JIN L,XU C S,HAN Y Q,et al.Effect of end friction on the dynamic compressive mechanical behavior of concrete under medium and low strain rates[J].Shock and Vibration,2016,2016:6309073.
Study on seismic performance of self-centering precast concrete frame connections with hysteretic dampers
Abstract: In order to break through the inherent mode of “equivalent to cast-in-place” of precast-monolithic concrete frame, combined with the advantage of traditional prestressed self-centering concrete frame, a kind of self-centering precast concrete with hysteretic damper(SCPCHD) frame was proposed. In order to verify the desirable seismic performance and energy dissipation capacity of the novel SCPCHD frame, the refined three-dimensional solid numerical analysis models of the novel self-centering SCPCHD frame, the traditional prestressed self-centering precast concrete(SCPC) frame and cast-in-situ reinforced concrete(RC) frame were established by using ABQUAS finite element software. The analysis results showed that: the residual deformation of the SCPCHD frame is negligible, and has the advantage of good self-centering capacity after earthquake. The inter-story displacement response of SCPCHD frame is obviously smaller than that of the SCPC frame, which is basically close to that of the cast-in-situ RC frame, and the plastic damage of structural component for SCPCHD frame is minor. Under the rarely-occurred earthquake, the energy dissipation of the beam-column joint of the SCPCHD frame was about 2.26 and 3.64 times that of the traditional prestressed SCPC frame and the cast-in-situ RC frame respectively, indicating the novel kind of joint has good energy dissipation capacity.
Keywords: self-centering; hysteretic damper; three-dimensional solid; energy dissipation capacity; plastic damage
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