试卷一 1.Consider the following two cases of loading Both cases are made with solid sawn wood product.Which of the following statement is true? A.The modulus of rupture value obtained from case 2 is greater than case 1. B.The modulus of rupture value obtained from case 1 is greater than case 2. C.The modulus of rupture values obtained from both cases are the same Caew☐ 2.Why is the bending strength of structural timber higher than the tension parallel to grair strength?Please mark,which one of the following answers is correct? A.Because beams in bending fail on the compression side and not on the tension side. B.Because the tension stressed volume of a member under a tension load is much larger than the tension stressed volume of a beam in bending. C.Because the bendir average of the te D.The tensio orcouforaructin n ssion strength 3 The formula方s should be used in calculating the strength of a compression timber member. where:A is the gr ss section area of the member.Is thistrueor false?Why? vertical loads and the horizontal loads to the structure respectively) 5.List 4 or more factors that affect the design strength of timber. 6.What do you need to keep in mind when you design a connection of timber construction? 7.Why is the bending strength of plywood higher in the 0o direction compared to the9 direction? 4odir 8.Assumed:A shear wall without transverse bracers between the studs is covered in out side with wood based structure panels. L=3m- (the length of the shear wall paralleled to the horizontal loads): MC=18% (misrefthewood-bas panel Specie for the studs is Douglas fur花i松)： fa =5.7 kNIm (the design shear strength for the shear wall with wood-based structure
试卷一 1. Consider the following two cases of loading. Both cases are made with solid sawn wood product. Which of the following statement is true? A. The modulus of rupture value obtained from case 2 is greater than case 1. B. The modulus of rupture value obtained from case 1 is greater than case 2. C. The modulus of rupture values obtained from both cases are the same. 2. Why is the bending strength of structural timber higher than the tension parallel to grain strength? Please mark, which one of the following answers is correct？ A. Because beams in bending fail on the compression side and not on the tension side. B. Because the tension stressed volume of a member under a tension load is much larger than the tension stressed volume of a beam in bending. C. Because the bending strength is the average of the tension and compression strength. D. The tension stress is lower because it accounts for a reduction in area at the connections 3. The formula should be used in calculating the strength of a compression timber member. where: A is the gross section area of the member. Is this true or false? Why? 4. Please describe the load bearing systems of a light wood frame structure.(hint: considering the vertical loads and the horizontal loads to the structure respectively) 5. List 4 or more factors that affect the design strength of timber. 6. What do you need to keep in mind when you design a connection of timber construction? 7. Why is the bending strength of plywood higher in the 0o direction compared to the 90° direction? 8．Assumed: A shear wall without transverse bracers between the studs is covered in out side with wood based structure panels. L=3m――(the length of the shear wall paralleled to the horizontal loads); MC=18%――(moisture content of the wood-based structure panel ); Specie for the studs is Douglas fur(花旗松)； ――(the design shear strength for the shear wall with wood-based structure panels);
The center distance between the studs is 400mm and the center distance between the nails is 150mm.Please calculate the design shear capacity value of the shear wall
The center distance between the studs is 400mm and the center distance between the nails is 150mm. Please calculate the design shear capacity value of the shear wall.（ ）