防灾减灾工程学报2018，Vol.38Issue(1)：47-55,9.DOI:10.13409/j.cnki.jdpme.2018.01.007
钢管再生混凝土框架抗震破坏机制与性能水准研究
Study on Seismic Failure Mechanism and Performance Control Parameters of Recycled Aggregate Concrete Filled Steel Tube Frame
摘要
Abstract
In order to study the seismic failure mechanism and performance level of recycled aggregate concrete filled steel tube (RACFST) frame,quasi-static tests were carried out on two frames including recycled aggregate concrete filled circular/square steel tube column-reinforced recycled aggregate concrete beam,with the replacement rate of recycled coarse aggregate of 100％.The failure characteristic and mechanism,hysteretic curves of load versus displacement and hysteretic curves of load versus strain were measured,and the criteria to determine the performance level of RACFST frame specimens based on performance design were discussed.It is shown that the seismic failure mechanism of the specimens was "strong column but weak beam,strong shear capacity but weak bending capacity,and strong node but weak components".Hysteretic curves of load versus displacement exhibited a full fusiform and were basically symmetrical.When frame specimens were damaged,the longitudinal strain of steel tube at column top was all less than yield strain,and that at column bottom reached about 10000 με,indicating good deformability of specimens.Longitudinal strain of steel reinforcement at beam end was more than yield strain for both specimen KJ-1 and KJ-2,and only stirrup strain of specimen KJ-1 reached yield strain.Hysteretic curves of load versus transverse strain of steel tube develop spirally along tensile strain axis.Based on the performance design of RACFST structures,five performance levels were divided,and horizontal displacement angle and damage index limit were established.关键词
钢管再生混凝土框架/破坏机制/性能水准/拟静力试验Key words
recycled aggregate concrete filled steel tube frame/failure mechanism/performance level/quasi-static test分类
建筑与水利引用本文复制引用
张向冈,陈宗平,薛建阳,苏益声..钢管再生混凝土框架抗震破坏机制与性能水准研究[J].防灾减灾工程学报,2018,38(1):47-55,9.基金项目
河南省科技攻关项目(172102210285)、2016年安全生产重大事故防治关键技术科技项目(henan-0006-2016AQ)、河南省高校基本科研业务费专项资金项目(2017)资助 （172102210285）
