蜂窝状钢骨混凝土L形截面异型柱的正截面受力性能分析  

Analysis on normal section bearing performance of honeycomb steel-reinforced concrete L-shape cross section column

作　　者：郑廷银[1] 苏明[1] 吴杏花[1] 陈志军[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2009年第3期11-17,28,共8页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省建设厅和南京市建设委员会联合资助项目(JS200120)

摘　　要：蜂窝状钢骨混凝土L形柱,是一种特别适于钢结构住宅建筑的新型异形柱.为了全面掌握该新型构件的受力、变形特性,首先对2根试件进行了单调加载试验,研究了轴心和偏心压力作用下该新型构件的受力、变形性能与破坏形态;然后利用ANSYS软件进行非线性有限元分析,研究了钢骨腹板开洞率、配钢率等因素对该新型构件性能的影响及其规律,并提出设计建议.研究表明,该新型构件的破坏模式与相应荷载作用下钢筋混凝土柱的破坏模式相似;在荷载不超过最大荷载的80%之前,该新型构件的截面应变符合平截面假定;钢骨腹板开洞能够增强混凝土与钢骨的协同工作能力;该新型构件的极限承载力随着配钢率、配筋率、混凝土强度、钢材强度的增加而增加,但随其长细比的增加而降低;加载角和偏心距的改变对蜂窝状钢骨混凝土L形柱的承载力影响非常敏感,设计时宜尽量避开最不利加载角对构件承载力的影响.Honeycomb steel-reinforced concrete L-shape cross section column is a new type of column, which especially suits to steel structure residential building. In order to totally understand stress and deformation characteristics of this structure, monotonous loading experiment of axial and eccentric compressions on two trial speciments was firstly conducted to study the stress and deformation characteristics, and failure mode of structure of this kind. Then non-linear finite element analysis was performed by ANSYS to study some effecting factors, such as hole rate in steel web and steel reinforced rate of L-shape column and so on, For this new-type structure and its performance, some designing suggestions were offered. The study shows, that the failure mode of SRC L-shape column has resemblance with that of reinforced concrete L-shape column under the same load. The section strain of this component will not accord with the hypothesis of planar section until the load exceeds 80% of the maximum. Making hole on steel web will strengthen cooperative capability of steel with the concrete. The maximum load will increase with increases of steel ratio, reinforcement ratio, concrete grade, and steel grade, but reduce with increase of slen-der ratio. The bearing capacity of the honeycomb SRC L-shape column is very sensitive to changes of loading angle and linear eccentricity, so when designing, it would be better to avoid the negative effect of the most unfavorable loading angles.

关 键 词：钢骨混凝土 蜂窝状钢骨 L形柱 非线性有限元分析 正截面受力性能 

分 类 号：TU323.1[建筑科学—结构工程]