【作者】 张波；

【导师】 王志军；

【作者基本信息】 重庆大学 ， 结构工程， 2013， 硕士

【摘要】 传统的筑巢轻钢龙骨结构体系中，抗侧墙体主要是靠覆在轻钢骨架上的结构板材（如OSB板）的蒙皮作用来抵抗水平荷载，为保证蒙皮在使用过程中不致受潮腐坏而使结构丧失抗侧能力，需要对蒙皮面板做严格的防潮处理，同时在防潮层之外还包括防火层和装饰层，这就造成轻钢结构体系的施工程序繁琐复杂、单位造价相对较高，阻碍了其推广的步伐。带板带和斜撑的筑巢轻钢龙骨组合墙体是一种无蒙皮结构体系，依靠轻钢墙体骨架自身来满足抗侧性能要求，从而简化了施工工序，降低了造价，便于推广应用。由于带板带和斜撑的筑巢轻钢龙骨组合墙体是一种新的墙体模式，在国内尚缺乏对其抗侧性能的试验研究。因此，为了了解该组合墙体在水平荷载作用下的受力特点、变形特性和破坏形态等抗侧性能，有必要对其进行研究。本文对4片带板带和斜撑的筑巢轻钢龙骨组合墙体足尺试件进行了有恒定竖向荷载作用下的水平低周反复加载试验，得到了不同构造墙体的屈服荷载、最大荷载、极限荷载、延性系数、能量耗散能力及耗能系数等抗侧性能指标，并在试验的基础上，结合节点半刚性简化模型，利用SAP2000建立有限元模型，对墙体的抗侧性能进行了静力非线性分析，验证了模型的准确性。通过对试验和分析的整理，本文得出以下结论：1、没有蒙皮和斜向支撑的单一的筑巢轻钢墙体骨架的抗侧能力很低，基本不具备成为结构剪力墙的能力。2、斜向矩管支撑和OSB板板带都能对墙体的抗剪强度和抗剪刚度起到显著的提高作用，其中斜向支撑的提高程度尤为显著，OSB板板带主要是在试件名义屈服后对墙体的抗剪强度和抗剪刚度有大幅度的提高。3、斜向矩管支撑和OSB板板带都能大幅度的提高墙体的能量耗散能力，同时OSB板板带对墙体的延性系数也有明显的提高作用。4、对此类结构，结合节点半刚性简化模型建立的SAP2000杆系模型，能较好地反映此类组合墙体的抗侧性能。更多还原

【Abstract】 In the traditional Nested Light-Weight Steel Joist System, the walls rely on thesome slab coverings (like the OSB) on the light steel frame to resist the lateral force. Inorder to make sure that the covering will not lose the capability of resisting lateraldeformation because of damp or moisture, the covering need to be processed withmoisture proof. In the meantime, there are also fire proof layer and decoration layer,which make the construction procedure complicated and the unit cost relatively high forthe light steel structure system. This will definitely impede the expansion of theutilization of the Nested Light-Weight Steel Joist System. The composite wall with slabstrips and diagonal bracings is one kind of alternative structure systems with nocoverings, which rely on themselves to resist the lateral force and are suitable for thehouses and villas. And this kind of wall will simplify the construction procedure andlower the cost and make it easy to expand the utilization.The composite wall with slab strips and diagonal bracings is one kind of new wallpatterns, and there is no experimental research about the capability of resisting lateraldeformation of the wall in our country. We need to do research on this new system, inorder to get information about the lateral performance of the wall under horizontal load,like the mechanical characteristics, deformation characteristics, and the failure mode.In this paper, lateral performance metrics of the four full-scale specimen ofcomposite wall with slab strips and diagonal bracings, like the magnitude of yield load,maximum load, ultimate load and the ductility factors, energy dissipation of the walls,are studied in the low cycle and reverse horizontal loading tests with constant verticalloading. On the basis of experiments and the simplified model of semi-rigid joint, FEModel is established with SAP2000, and non-linear static analysis of the walls is carriedout. The accuracy of the model is verified.With the results of the experiments and analysis, conclusions of this paper aredrawn below:1、The capability of resisting lateral deformation of Nested light-steel wall framewith no covering and diagonal bracing is very low, which makes it impossible for thewall frame to be the structural shear wall.2、Shear strength and shear stiffness of the wall are enhanced immensely by thediagonal bracings and OSB strips. And the diagonal bracing is more effective, while theOSB strip mainly works after the nominal yield. 3、The ability of energy dissipation of the wall is enhanced immensely by thediagonal bracings and OSB strips, and OSB strips significantly improve the ductility ofthe wall.4、For the similar wall structure system, the trussing model of SAP2000which isbased on the the simplified model of semi-rigid joint can reveal the lateral performanceof these kind of walls very well.更多还原