Seismic Behavior of Precast and Post-Tensioned Exterior Connections with Ductile Headed Rods

被引：14
|
作者：
Kim, Sanghee [1 ]
Kang, Thomas H-K [2 ,3 ,4 ]
Jung, Donghyuk [5 ]
LaFave, James M. [6 ,7 ,8 ]
机构：
[1] Kyonggi Univ, Suwon, South Korea
[2] Seoul Natl Univ, Struct Engn, Seoul, South Korea
[3] Seoul Natl Univ, Engn Educ Innovat Ctr, Seoul, South Korea
[4] Univ Illinois, Summer Posttensioned Concrete Struct Course, Urbana, IL USA
[5] Pusan Natl Univ, Busan, South Korea
[6] Zhejiang Univ, Undergrad Studies, Hangzhou, Peoples R China
[7] Zhejiang Univ, CEE Educ Programs, Hangzhou, Peoples R China
[8] Univ Illinois, Dept Civil & Environm Engn CEE, Urbana, IL USA
来源：
ACI STRUCTURAL JOURNAL | 2021年 / 118卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
beam-column connection; embedded ductile rod connection; post-tensioned concrete; precast concrete; seismic performance evaluation; JOINT SHEAR BEHAVIOR; CONCRETE;
D O I：
10.14359/51728179
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study experimentally investigates the seismic structural performance of ductile bolted connectors and unbonded post-tensioning tendons for exterior precast concrete (PC) beam-column connections. Three full-scale beam-column subassemblies-a monolithic reinforced concrete (RC) connection conforming with ACI 318-19, a PC connection with ductile rods, and a PC connection with ductile rods and post-tensioning-were fabricated for quasi-static cyclic loading tests. The PC specimens exhibited stable lateral load resistance up to +/- 4% inter-story drift, with concentrated inelastic deformation within the ductile rods per the intended design concept. After reaching their peak lateral loads, the PC specimens experienced strength degradation comparable to the RC specimen, demonstrating that they are adequate for a lateral load-resisting system. The prestressing force induced by the post-tensioning was found to be effective at improving flexural and shear strength of the beam-column connection and at reducing the pinching effect observed at the beam-column interface of the PC specimens.
引用
收藏
页码：87 / 100
页数：14
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