外挂式轻钢龙骨墙体-钢框架连接受力性能研究

发布时间：2018-06-16 03:46

本文选题：外围护墙体 + 腹板开孔轻钢龙骨　；参考：《建筑结构学报》2016年06期

【摘要】：为提高腹板开孔轻钢龙骨外围护墙体的装配化程度,实现该类墙体的整片式吊装,提出了该类墙体与钢框架之间的外挂式连接方案。考虑钻尾钉、长螺栓两种连接型式及墙体厚度的影响,设计5片外挂于足尺钢框架的墙体标准单元,试验研究连接在风压与风吸荷载作用下的可靠性。采用ABAQUS有限元分析软件建立实体有限元模型,在验证了有限元模型合理可靠的基础上,分析风压与风吸荷载作用下,不同厚度墙体与钢框架连接的应力状态与传力路径。在此基础上,对2组外挂于钢框架的3 m×3 m足尺腹板开孔轻钢龙骨墙体进行了滞回试验,其中一组外挂墙体开设窗洞口,窗墙面积比为0.3,验证外挂式连接在地震作用下的可靠性。研究表明,钻尾钉难以保证风吸荷载作用下墙体连接的受力性能;当腹板开孔轻钢龙骨墙体与钢框架间采用外挂式连接时,建议采用长螺栓连接型式。长螺栓外挂式连接传力明确、施工方便;在风压、风吸及面内水平荷载作用下,墙体发生破坏时,连接区域材料未屈服,龙骨未发生局部屈曲,不会发生脆性破坏,在常用墙体厚度范围内均留有较高的安全储备,能够达到"强连接弱构件"的设计理念。
[Abstract]:In order to improve the assembling degree of the external retaining wall of light steel keel with web opening and realize the integral lifting of this kind of wall, a scheme of external connection between this kind of wall and steel frame is put forward. Considering the influence of two kinds of connection types and wall thickness of drilling-tail nail and long bolt, five wall standard elements attached to full-scale steel frame are designed, and the reliability of the connection under wind pressure and wind suction load is studied experimentally. Abaqus finite element analysis software is used to establish the solid finite element model. On the basis of verifying the rationality and reliability of the finite element model, the stress state and the load transfer path of the wall with different thickness connected to the steel frame under the action of wind pressure and wind suction load are analyzed. On the basis of this, two groups of 3 m 脳 3 m full-scale web plate perforated light steel keel walls are tested in hysteretic loop. The area ratio of window to wall is 0.3, which verifies the reliability of external connection under earthquake. The results show that the drilling-tail nail can not guarantee the mechanical performance of the wall connection under the action of wind suction load, and the long bolt connection type is recommended when the web plate perforated light steel keel wall is connected with the steel frame. Under the action of wind pressure, wind suction and in-plane horizontal load, when the wall is damaged, the connection area material does not yield, the keel does not have local buckling, and the brittle failure will not occur. In the common wall thickness range, there is a high safety reserve, which can reach the design idea of "strong connection and weak component".
【作者单位】：哈尔滨工业大学结构工程灾变与控制教育部重点实验室;哈尔滨工业大学土木工程学院;
【基金】：哈尔滨市科技创新人才研究专项资金项目(2012RFLXG025)
【分类号】：TU398.9

【参考文献】