CAJ | 학술논문

为了减小强烈地震作用下钢筋混凝土框架梁柱节点的损伤破坏,在不影响建筑使用空间的前提下,提出在梁柱节点区附近设置耗能腋撑,改善框架结构的抗震性能.以一榀普通单层钢筋混凝土框架结构为研究对象,耗能腋撑采用防屈曲支撑,对框架结构进行低周反复数值模拟试验研究,并变化耗能腋撑布置方式,研究耗能腋撑对框架抗震性能影响.计算结果表明,带耗能腋撑框架滞回曲线饱满,框架结构的强度与刚度退化得到减缓,延性系数提高了53%;随着耗能腋撑与梁端距离或夹角的增大,框架结构的初始刚度与承载力均得到提高,两者分别提高了48%和39%,其延性系数最大可达到8.66;而耗能腋撑与梁的夹角对框架结构的刚度退化系数影响并不显著.耗能腋撑有效地改善了钢筋混凝土框架的抗震性能.
위료감소강렬지진작용하강근혼응토광가량주절점적손상파배,재불영향건축사용공간적전제하,제출재량주절점구부근설치모능액탱,개선광가결구적항진성능.이일품보통단층강근혼응토광가결구위연구대상,모능액탱채용방굴곡지탱,대광가결구진행저주반복수치모의시험연구,병변화모능액탱포치방식,연구모능액탱대광가항진성능영향.계산결과표명,대모능액탱광가체회곡선포만,광가결구적강도여강도퇴화득도감완,연성계수제고료53%;수착모능액탱여량단거리혹협각적증대,광가결구적초시강도여승재력균득도제고,량자분별제고료48%화39%,기연성계수최대가체도8.66;이모능액탱여량적협각대광가결구적강도퇴화계수영향병불현저.모능액탱유효지개선료강근혼응토광가적항진성능.
To decrease the damage and fracture of reinforced concrete beam-column joint under strong earthquake, energy dissipation haunch braces (EDHB) were proposed to be installed to im-prove the seismic performance of reinforced concrete(RC) frame without violating floor usage. A sin-gle-story reinforced concrete frame equipped with buckling restrained braces was selected, and nu-merical simulation investigations of the RC frame subjected to low cyclic loading were carried out and the effects of different arrangement of EDHBs on the seismic performances of the frame were studied. Results show that the hysteretic curves of the frame with EDHBs is plump, strength and stiffness degradation are alleviated, and the ductility coefficient can be inereased 53%;with the increase of the distance or the angle between EDHBs and the beam, the initial stiffness and bearing capacity of the frame can be enhanced 48% and 39% , the ductility coefficient maximally reaches 8. 66, and the stiffness degradation of the frame can be influenced insignificantly by the angle between EDHBs and the beam. The seismic performances of the RC frame are improved effectively by EDHBs.