摘要
在外挂再生混凝土墙板钢框架结构拟静力试验研究的基础上,采用有限元程序对试验试件进行了非线性分析,重点研究结构的滞回性能、钢框架的应力分布、外挂墙板及柱脚的变形形态等,继而对改进设计试件和外挂墙板挂点位置、再生混凝土强度、外挂墙板厚度和高跨比等参数试件进行了拓展分析。结果表明:有限元分析能较好地模拟结构的滞回性能,承载力与试验结果差值在3%以内,试件变形与试验现象吻合较好;沿外挂墙板对角线预埋X形钢板,及在下部外挂节点柱翼缘焊接加劲肋等改进设计,可以明显降低外挂墙板混凝土的开裂、减小柱翼缘的局部弯曲变形等;外挂墙板挂点位置、再生混凝土强度及外挂墙板厚度等设计参数对结构滞回性能的影响较小,而高跨比对结构滞回性能的影响较大。
On the basis of the quasi static test study of steel frame structure with recycled concrete external wall, the nonlinear analysis of the test specimens was carried out by using the finite element program,focusing on the hyster- etic behavior of the structure, the stress distribution of the steel frame and the deformation form of the external wall and column bottom, etc. Then the improved design specimens and several parameters specimens such as the posi- tion of the external wall hanging points, the strength of recycled concrete, the thickness of the external wall and the height span ratio were analyzed~ The results show that the finite element analysis can simulate the hysteretie behav- ior of the structure precisely, the difference of the value of the bearing capacity between the finite element and the test results is less than 3 %, and the deformation form of the specimens is in good agreement with the experiment. The improved design of the X - shaped steel plate embedded inside the diagonal of the external wall and the stiffened rib welded on the column flange at the lower external joints can obviously reduce the cracking of the external wall concrete and the local bending deformation of the column flange . The design parameters such as the position of the external wall hanging points, the strength of the recycled concrete and the thickness of the external wall have lit- tle influence on the hysteretic behavior of the structure,however the high span ratio has a great influence.
出处
《地震工程与工程振动》
CSCD
北大核心
2017年第4期67-76,共10页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51308454)
中国博士后科学基金项目(2013M542371)
陕西省博士后自然科学基金
陕西省住建厅建设科技专项(2014-K12)~~
关键词
钢框架
再生混凝土
外挂墙板
抗震性能
有限元分析
steel frame
recycled concrete
external wall
hysteretic behavior
finite element analysis
