Aseismic behavior of precast concrete frame joints with partial high strength tendons
YU Jianbing1,2,3, ZHOU Liping1,3, GUO Zhengxing2, MA Hongwei1
1. College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China;
2. School of Civil Engineering, Southeast University, Nanjing 210096, China;
3. Green Building Materials Research Institute, Yangzhou University, Yangzhou 225127, China
Abstract：In order to study aseismic performance of a new prefabricated concrete frame joints with partial high strength tendons, low cyclic repeated load tests were performed for 4 post-pouring integral prefabricated beam-column joints and 1 cast-in-situ comparative one to explore their failure mode, hysteresis curve, displacement ductility coefficient, energy dissipation capacity and stiffness degradation. The test results showed that additional steel bars located in joint’s core area can effectively improve joint’s load-bearing capacity and deformation one, realize plastic hinges’ off-shifting at beam ends and improve joint’s energy-dissipation ability; compared with the cast-in-situ joint, the energy-dissipation ability of prefabricated ones is weaker within the initial stage of loading, with increase in loading, the latter’s energy-dissipation ability is stronger than that of the former; in elastic stage, the stiffness of all prefabricated joints is smaller than that of the cast-in-situ one, while in yield stage, the stiffness of the latter is larger than that of the former; thus, prefabricated frame joints with partial high strength tendons have larger safety stock and can be popularized and applied in areas with seismic fortification.
[1] 郭正兴. 新型预制装配混凝土结构规模推广应用的思考[J]. 施工技术, 2014 (1): 17-22.
Guo Zhengxing.Thoughts on Popularization and Application of New Type Prefabricated Concrete Structure[J]. Construction Technology, 2014 (1): 17-22
[2] Stanton J F, Nakaki S D. Design guidelines for precast concrete seismic structural systems [R].PRESSS report No.01/03-09.Department of Civil Engineering, University of Washington, Seattle, 2002..
Jiang Qinjian,Zhong Zhiqiang. Precast Concrete Component Industry Development of China in 2011[J]. 2012, (31): 94-99.
[3] P. Wongmatar, C. Hansapinyo, C. Buachart. Relocation of Plastic Hinge of Interior Beam-Column Connections with Intermediate Bars in Reinforced Concrete and T-Section Steel Inserts in Precast Concrete Frames[J]. International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering,2015,9(5):607-615.
[4] Tae-Sung Eom1; Hong-Gun Park. Plastic Hinge Relocation Methods for Emulative PC Beam–Column Connections[J]. J. Struct. Eng. 2016, 142(2): 04015111-1-04015111-13.
[5]韩春,李青宁,姜维山等.装配式预应力混凝土梁与高强钢筋约束混凝土柱连接节点抗震性能试验研究[J].振动与冲击. 2017,36(01):248-254.
Han Chun,Li Chunning, Jiang Weishan.Test for aseismic behavior of prestresses fabricated precast concrete beam-column joints to cyclic loading[J]. Journal of Vibration and Shock. 2017,36(01):248-254.
[6]赵唯坚, 超高强材料与装配式结构[J].工程力学,2016,29(增刊):31-42.
ZHAO Wei-jian, ULTRA-HIGH STRENGTH MATERIALS AND PRECAST CONCRETE STRUCTURES[J]. ENGINEERING MECHANICS, 2016,29(Supplement):31-42.
[7] ]蔡建国. 世构体系框架中节点抗震性能试验研究[J].中南大学学报(自然科学版),2012,43(5):1894-1901
CAI Jian-guo, Experimental study on seismic behavior of middle joints of SCOPE system[J]. Journal of Central South University (Science and Technology) 2012,43(5):1894-1901.(In Chinese)
[8]于建兵,郭正兴.钢绞线锚入式预制装配混凝土框架节点抗震试验研究[J].东南大学学报,2017,47(4):760-765.
Yu Jianbing, Guo Zhengxing. Seismic Experimental Study on Strands Anchored Precast Concrete Frame Connections[J].Journal of Southeast University(Natural Science Edition)
[9] GB 50011-2010,建筑抗震设计规范[S].北京: 中国建筑工业出版社,2010
[10] JGJ 101-96, 建筑抗震动试验方法规程[S].北京: 中国建筑工业出版社,1997.
[11]吕西林,范力,赵斌.装配式预制混凝土框架结构缩尺模型拟动力试验研究[J].建筑结构学报,2008,29(4):58-65
Lv Xilin Fan Li Zhao Bin. Pseudo dynamic test on a reduced scale jointed precast concrete frame structure[J]. Journal of Building Structures,2008,29(4):58-65
[12]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.
