AISC DESIGN GUIDE 1 ERTA-2015 Base Plate and Anchor Rod Design (Second Edition).pdf

1、1 Revisions and Errata List AISC Steel Design Guide 1, 2ndEdition, 2ndprinting (Printed Copy) May 20, 2015 The following list represents corrections to the second printing (dated March 2010) of the second edition of AISC Design Guide 1, Base Plate and Anchor Rod Design. Page(s) Item 6 In the left co

2、lumn, third paragraph beginning with “The washer diameters shown in Table 2.3,” the fourth sentence contains a reference to AISC Design Guide 7, but the reference should be to Design Guide 10. The corrected sentence should read, “The plate washer thicknesses shown in the table are similar to the rec

3、ommendation in Section 4.2.5 of AISC Design Guide 10, that the minimum washer thickness be approximately 3 the anchor rod diameter.” 17 In the left column, the third equation below step “4. Calculate the required base plate thickness” should read: 4fdbn 29 The last word of the first incomplete parag

4、raph should be “bending” rather than “shear.” The last sentence should read: “It is the authors opinion that the reduction is not required when AISC combined bending and shear checks are made on the anchor rods, and the resulting area of the anchor rod is 20% larger than the rod without bending.” 42

5、 Example 4.9: In the left column, the last sentence in paragraph 1 of the Solution section should be, “The bearing strength of the concrete in contact with the lug is evaluated as 1.3fcAl, where = 0.65.” In the right column, eighth line from the top, the calculation changes to: 20.65 1.3 4,000 psi 3

6、6,800 lb10.8 in.lreq dlreq dAAAnd the next calculation becomes: 10.8 in. 9 in.1.2 in.d 45 Replace the text in the left column, beginning with the last paragraph, as follows: By inspection, -in. plate washers will suffice even with minimal edge distance. Thus, the lever arm can be taken as half the d

7、istance from the center of the plate washer to the top of the grout. The plate washer is -in. thick, and the base plate is 1.25-in. thick (LRFD) and 1.00-in. thick (ASD), as determined in Example 4.5. LRFD ASD 2 1.25 in.+ 0.500 in./2Lever arm20.750 in.Thus 36.8 kips 0.750 in.46.90 kip-in.lM 1.00 in.

8、+ 0.500 in./2Lever arm20.625 in.Thus 23.0 kips 0.625 in.43.59 kip-in.lM 45 Replace the calculation boxes in the right column with the following: LRFD ASD 36.90 kip-in.0.237 in.29.1 ksitbf 33.59 kip-in.0.237 in.15.1 ksitbf LRFD ASD The axial stress in the rods is: 269.8 kips40.994 in.17.6 ksiutaPfATh

9、e tensile stress is: 29.1 ksi 17.6 ksi46.7 ksitf Combined shear and tension strength: 0.750.75 58 ksi43.5 ksi0.40.4 58 ksi23.2 ksi (threads included)1.31.3 43.5 ksi0.75 43.5 ksi 9.26 ksi0.75 23.2 ksi25.1 ksi0.75 43.5 ksi 32.6 knt unv untnt nt v ntnvFFFFFFFfFF siThe axial stress in the rods is: 242.8

10、 kips40.994 in.10.8 ksiataPfAThe tensile stress is: 15.1 ksi 10.8 ksi25.9 ksitf Combined shear and tension strength: 3 46.7 ksi 25.1 ksi n.g. 0.750.75 58 ksi43.5 ksi0.40.4 58 ksi23.2 ksi (threads included)1.31.3 43.5ksi2.00 43.5ksi 5.78ksi23.2 ksi2.0017.4 ksi43.5 ksi21.8 ksi2.00nt unv untnt vnvnt nt

11、FFFFFFfFFF 25.9 ksi 17.4 ksi n.g. 46 Replace the calculation boxes in the left column with the following: LRFD ASD Shear stress: 236.8 kips41.77 in.5.20 ksivf 33361.50 in.60.563 in.dZ 36.90 kip-in.0.563 in.12.3 ksitbf Shear stress: 223.0 kips4 1.77 in.3.25 ksivf 33361.50 in.60.563 in.dZ 33.59 kip-in

12、.0.563 in.6.38 ksitbf LRFD ASD The axial stress equals: 269.8 kips41.77 in.9.86 ksiutaPfAThe axial stress equals: 242.8 kips41.77 in.6.05 ksiataPfA4 The tensile stress is 12.3 ksi 9.86 ksi22.2 ksitf 1.3 43.5 ksi0.75 43.5 ksi 5.20 ksi0.75 23.2 ksi32.7 ksi0.75 43.5 ksi 32.6 ksi32.6 ksintntFF22.2 ksi 3

13、2.6 ksi o.k. Use four 12-in.-diameter rods. The tensile stress is 6.38 ksi 6.05 ksi12.4 ksi1.3 43.5 ksi2.00 43.5 ksi 3.25 ksi23.2 ksi2.0022.2 ksi43.5 ksi21.8 ksi2.0021.8 ksitntntfFF 12.4 ksi 21.8 ksi o.k. Use four 12-in.-diameter rods. 59 Figure B.3: Revise Figure B.3, revising the N dimension to start at the T tension force at the anchor rod rather than the left edge of the base plate, as follows: