掺锂渣再生混凝土框架中节点延性及耗能分析  

Ductility and energy dissipation analysis of joints in recycled concrete frame with lithium slag

作　　者：罗玲[1,2] 刘雪梅 李桐 卢义 LUO Ling;LIU Xuemei;LI Tong;LU Yi(School of Civil Engineering and Architecture,Xinjiang University,Urumqi 830046,China;Xinjiang Civil Engineering Technology Research Center,Urumqi 830000,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830046 [2]新疆土木工程技术研究中心,新疆乌鲁木齐830000

出　　处：《混凝土》2023年第9期66-71,共6页Concrete

基　　金：国家自然科学基金(51668061)。

摘　　要：为了研究掺锂渣再生粗骨料混凝土框架中节点的抗震性能,对锂渣掺量分别为0和20%,再生粗骨料取代率为30%的6榀掺锂渣再生粗骨料混凝土框架中节点在低周反复荷载作用下的试验现象进行分析,根据试验数据以及滞回曲线和骨架曲线,研究构件的延性及耗能能力。研究结果表明,当锂渣掺量为20%,核心区配箍率为0.218%和0.773%时,再生混凝土节点的延性及耗能性能增强;当梁柱截面高度比由1.0增加至1.5,构件开裂荷载及极限荷载均有不同程度提高,其中锂渣掺量为20%、核心区配箍率为0.218%的构件各项荷载提高明显强于锂渣掺量为0、核心区配箍率为0的构件,说明锂渣、核心区配箍率和截面高度比协同作用对构件性能有大幅提升,可以有效提高节点开裂荷载,增加循环次数,延缓构件破坏。In order to study the doped lithium slag recycled coarse aggregate concrete frame node in the seismic performance,the dosage of lithium slag were 0,20%,30%recycled coarse aggregate content of six common doped lithium slag recycled coarse aggregate in concrete frame node under low reversed cyclic loading experiment phenomenon is analyzed,according to the test data and the hysteretic curve and skeleton curve,ductility and energy dissipation capacity of specimens were studied.The results show that when the content of lithium slag is 20%and the ratio of stirrings in the core area is 0.218%and 0.773%,the ductility and energy dissipation performance of recycled concrete joints are enhanced.When the height of column section and beam section ratio increased from 1.0 to 1.5,specimen cracking load and ultimate load to some extent,20%of lithium slag components each load increase obviously stronger than lithium slag dosage of 0 artifacts,lithium slag and cross section height than the synergy of component performance has improved,can effectively improve the node cracking load,increase the cycles,delay specimen failure.

关 键 词：再生混凝土 梁-柱节点 抗震性能 延性 耗能 

分 类 号：TU528.01[建筑科学—建筑技术科学]