The Lateral Performance Of End Panels Strengthed Timber-shear Wall Under Monotonic Load

Light timber-frame structure are widely used in residential,commercial and public buildings in North America,Europe and other countries due to their environmentally friendly materials,convenient construction and good seismic performance.China has also paid more and more attention to the development and application of this kind of structure.The timber shear wall is the main lateral force component in the structure.Therefore,studying the lateral performance of the timber shear wall is of great significance for studying the seismic performance of light timber-frame structure.The shear wall of timber-frame structure is composed of specification materials,structural sheathing panels and fasteners.The lateral performance mainly depends on the performance of the panel and the nail.In the lateral performance test of the traditional light timber shear wall,the wall damage is concentrated on the bottom and top of the sheathing panel.A new type of end plate reinforced timber shear wall was proposed,which changed the traditional timber shear wall form,replacing the 350-wide OSB board at the top and bottom of the wall with better material properties.In order to study the lateral performance of the end plate reinforced timber shear wall,this paper had carried out the following work:The material properties of various materials constituting the wall were tested,and the nail joints were subjected to monotonic loading test.The nail joints were basic elements of the timber shear wall.Load-displacement curves and provide basic data for finite element analysis of lightweight wood-structured shear walls.Through the monotonic horizontal loading test of 9 sets of timber shear walls with different parameters,the effect of end plates were SPF timber plate and reconstituted bamboo boards,the nails were iron nails and self-tapping screws,the spacing of nail was 75mm and 150mm on the lateral performance of the wall.The failure modes,the uplift of the stud,the ultimate bearing capacity,the elastic lateral stiffness,the ductility and the energy consumption of the timber shear wall was analyzed.The research shows that replacing the top and bottom plates of the traditional timber shear wall has a great influence on the lateral performance.The failure modes of wall with re-combine bamboo and the 150mm spacing of iron nail was similar to that of a traditional wall.But another wall was damaged by the tearing of the bottom plate or the tearing of the bottom beam.The new type timber shear walls can change the failure modes of traditional wall and make full use of material strength.The type of timber shear wall were respectively SPF-self-tapping nail-150mm,re-combine bamboo-iron nail-150mm and re-combine bamboo-self-tapping nail-150mm had better lateral performance than traditional wall.The 75mm spacing of the edge of the panel nails can increase the elastic stiffness of the wall,but it reduced the ductility and energy consumption of the wall.The ABAQUS finite element analysis software was used to simulate the end plate reinforced timber shear wall,the failure mode and ultimate bearing capacity of the model and the test wall were compared,verify the accuracy of the model,and further analyzed the stress nephogram of the model.The influence of the panel material,the type of panel nails,and the edge nail spacing on the internal force distribution of the wall.