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(1 河南農(nóng)業(yè)大學(xué)基建處， 鄭州 450046；2 廣州大學(xué)土木工程學(xué)院， 廣州 510006；3 華北水利水電大學(xué)土木與交通學(xué)院， 鄭州 450045)
［摘要］為了研究阻尼器處開洞樓板對裝配式混凝土框架節(jié)點區(qū)域抗震性能的影響，設(shè)計了帶樓板的裝配式混凝土框架節(jié)點試件，并對其進行了低周反復(fù)加載試驗，研究了試件的破壞特征、承載能力、滯回曲線、骨架曲線、剛度退化、等效黏滯阻尼系數(shù)等。試驗結(jié)果表明：相對于無樓板裝配式混凝土框架節(jié)點，帶樓板的裝配式混凝土框架節(jié)點試件滯回曲線較飽滿，具有良好的耗能效果，增大了試件的剛度，還提高了試件的承載能力；但是由于樓板的存在，增加了梁和阻尼器上部的剛度，使得梁中性軸上移，造成各種抗震性能指標在正負向加載時差別較大，也造成阻尼器下翼緣和上翼緣變形差別較大。為了改善阻尼器上下翼緣受力變形不一致的問題，筆者提出兩條改進建議：一是改進阻尼器上下翼緣截面大小，做成上下翼緣截面不一樣大小，來匹配受力不一樣的問題；二是改變阻尼器在梁高度方向的安裝位置，使得梁板中和軸正好位于阻尼器的形心位置。
［關(guān)鍵詞］樓板；阻尼器；裝配式混凝框架節(jié)點；抗震性能；試驗研究
中圖分類號：TU375-4 文獻標識碼：A文章編號：1002-848X(2021)22-0102-07
Experimental study on influence of floor slab on seismic performance of prefabricated concrete frame joints
ZHANG Junwei1, WU Congxiao2, WANG Tingyan3, ZHANG Qian2
(1 Infrastructure Department，Henan Agricultural University, Zhengzhou 450046， China；2 School of Civil Engineering, Guangzhou University, Guangzhou 510006， China；3 School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045， China)
Abstract: In order to study the influence of the slab opening at the damper on the seismic performance of the prefabricated concrete frame（PCF）joint area, a PCF joint specimen with a floor slab was designed, and low-cycle repeated loading tests were carried out to study the damage features, bearing capacity, hysteresis curve, skeleton curve, stiffness degradation, equivalent viscous damping coefficient of the specimen, etc. The results show that compared with prefabricated concrete frame joints without floor slab, the hysteresis curve of the PCF joint with floor slab is relatively full, has a good energy dissipation effect, increases the stiffness of the specimen, and improves the load-bearing capacity of the specimen; but due to the existence of the floor, the rigidity of the upper part of the beam and the damper is increased, which causes the neutral axis of the beam to move up, resulting in a large difference between various seismic performance indicators when loaded in positive and negative directions, and also resulting in a large difference in the deformation of the lower flange and the upper flange of the damper. In order to improve the problem of inconsistent force and deformation of the upper and lower flanges of the damper, two suggestions were proposed: one is to improve the size of the upper and lower flange sections of the damper, and make the upper and lower flange sections have different sizes to match the different forces. The second is to change the installation position of the damper in the height direction of the beam so that the neutral axis of the beam plate is exactly at the centroid position of the damper.
Keywords:floor； damper； prefabricated concrete frame joint； seismic performance； experimental study
*國家重點研發(fā)計劃重點專項:工業(yè)化建筑隔震及消能減震關(guān)鍵技術(shù)（2017YFC0703600），四川省自然科學(xué)基金項目（21YYJC3547）。
作者簡介：張軍偉，博士，高級工程師，一級注冊建造師，碩士生導(dǎo)師，Email:122383839@qq.com； 通信作者：吳從曉，博士，副教授，碩士生導(dǎo)師，Email:13377526@qq.com。
