Manufacturer And Finite-Element Analysis Of Wood I-Joist

In recent years, national economy and forestry technology develop rapidly, wood material were used in not only field of furniture and decorate, but also in architecture as structural members. These materials are called wood engineering material. These materials were made of wood by a series of processing technic, and their structure and property are contrivable, divinable and appraisable. In recent years, people oriented, green initiative and sustainable development gradually become the design concept of materials. Wood engineering materials just match these performances, together with they were low-energy consumption, low-cost and high-performance, high-reward, and these materials were used more widely. Wood I-Joist is the most characteristic one of these materials, and it’s the most widely used one. The "I" sharp of wood I-Joist was designed with request of mechanics of materials, under this condition, we can use fewest material to product and get the I-Joist with the biggest mechanical strength. Wood I-Joist were also used in long span structures, not only because the superiority of its mechanical property, but also because it has strong span skills. Scientific study revealed that:the biggest span of traditional wood-based materials was5meters when the I-Joist can reach10.5meters. The newest study of Heilongjiang academy of forestry revealed the span can match12meters, which means I-Joist well used in more and more structures of long span.Although wood I-Joists were widely used in practice, but the design of material is always obtained from the experience of years of using them. The detection of mechanical property is still using the method of traditional mechanical. In this case, I-Joist with better property cannot be designed, and a lot of materials will be wasted. In this issue, bonding property was studied from two parts:tensile test and tensile shear text, then we obtained the best manufacturing process of I-Joist. In the process of mechanical detection, finite element method was taken. It can increase the precision of material properties. At the same time, a lot of material will be saved. In the other hand, mechanical property of wood I-Joist was detected under the standard of timber structure testing method, at the aim of checking the feasibility of finite element method using in wood engineering materials.The elastic constant of wood based materials was determined with determination method based on mechanics, which can’t determine the elastic constant accurately. In this paper, resistance technique was studied. Using this method, we determined the elastic constant of the parts of I-Joist accurately, we also found the feasibility of this method using in wood based materials.In the process of analogue simulation, the large general finite element software named ABAQUS was used, simulating the change of mechanical property, sharp of material and structure inward during the process of static load. Compare the result of timber structure test to check the correctness of the simulation with ABAQUS.