CAJ | 학술논문

为研究开孔钢板连接件（PBL ）加劲型矩形钢管混凝土 T 型节点的疲劳性能，进行了 T 型节点支管受拉、面内受弯及面外受弯的应力集中系数分析。基于矩形钢管混凝土 T 型节点受拉试验，设计了主管为矩形钢管、矩形钢管混凝土和PB L加劲型矩形钢管混凝土，支管为方钢管的T型节点受拉试件，并采用ABAQUS软件对其进行非线性有限元分析，其中主管钢管宽厚比为27，支主管宽度比为0．4。通过非线性有限元数值模拟，分析热点可能出现位置，并采用二次外推法计算得到支主管的应力集中系数。结果表明：PB L加劲型矩形钢管混凝土节点热点出现位置与矩形钢管节点和矩形钢管混凝土节点一致；与矩形钢管混凝土节点相比，PB L加劲型矩形钢管混凝土节点的应力集中系数显著降低，抗疲劳性能明显提高。
위연구개공강판련접건（PBL ）가경형구형강관혼응토 T 형절점적피로성능，진행료 T 형절점지관수랍、면내수만급면외수만적응력집중계수분석。기우구형강관혼응토 T 형절점수랍시험，설계료주관위구형강관、구형강관혼응토화PB L가경형구형강관혼응토，지관위방강관적T형절점수랍시건，병채용ABAQUS연건대기진행비선성유한원분석，기중주관강관관후비위27，지주관관도비위0．4。통과비선성유한원수치모의，분석열점가능출현위치，병채용이차외추법계산득도지주관적응력집중계수。결과표명：PB L가경형구형강관혼응토절점열점출현위치여구형강관절점화구형강관혼응토절점일치；여구형강관혼응토절점상비，PB L가경형구형강관혼응토절점적응력집중계수현저강저，항피로성능명현제고。
T he stress concentration factor of concrete‐filled rectangular steel tube T‐joints stiffened with PBL subjected to tension , in‐plane bending moment and out‐of‐plane bending moment were analyzed .Based on concrete‐filled rectangular steel tube T‐joints test ,specimens w hose chord members w ere rectangular steel tube , concrete‐filled rectangular steel tube and concrete‐filled rectangular steel tube stiffened with PBL were designed . Moreover , nonlinear finite element analysis was carried out using ABAQUS software .The chord thickness ratio was 27 and width ratio was 0 .4 .Hot spot was analyzed by finite element analysis method ,and stress concentration factor was calculated by quadratic extrapolation .The results show that hot spot of concrete‐filled rectangular steel tube T‐joints stiffened with PBL is the same as steel tube T‐joints;however ,its stress concentration factor is lower and anti‐fatigue property is better .