【Q&A】Catalytic Coking Reformate Blending Edition 20171124
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Participation: Reward of 3~5 wealth points； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: What are the causes of deformation in steel structural members? Answer: There are two reasons: (1) deformation caused by external forces, and (2) deformation caused by internal stresses. Use your fingers to get involved – our ultimate goal is for everyone to acquire knowledge. Giving roses to others leaves a pleasant fragrance in one’s own hands. https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif The answers will be announced automatically after two days. 【Daily Question】Summary post for 2017 on the catalytic coking and reforming oil blending version: https://bbs.hcbbs.com/thread-1811219-1-1.html 【Q&A】Summary post for 2017 on the catalytic coking and reforming oil blending version: https://bbs.hcbbs.com/thread-1826018-1-1.html
The internal stress has not been completely eliminated, resulting in overload
1. When the weld is located on one side of the steel structure’s cross-section, bending deformation occurs due to thermal expansion and contraction. 2. Angular deformation takes place during the welding of steel structures. 3. During welding, both longitudinal and transverse deformation of the weld occur, which can result in wavy deformation of the steel structure. 4. Deformation is caused by the longitudinal and transverse contraction of the weld
(1) Deformation caused by external forces (2) Deformation caused by internal stresses.
The reasons for the deformation of steel structural members are as follows: 1. When the weld is located on one side of the steel structure’s cross-section, bending deformation occurs due to thermal expansion and contraction. 2. When welding steel structures, there are two main reasons for angular deformation: (1) For V-groove joints: the asymmetric shape of the weld cross-section leads to uneven lateral contraction on the upper and lower parts of the weld, resulting in angular deformation; (2) For X-groove joints: an improper welding sequence results in unequal lateral contraction of the welds on the two sides, which also causes angular deformation. 3. During the welding of steel structures, wave-like deformation of the steel components is caused by the combined effect of the following factors. (1) The compressive stress on the thin plate edges caused by the longitudinal shortening of the weld: (2) The angular deformation resulting from the transverse shortening of the weld. Deformation occurs both longitudinally and transversely in the weld, which can result in wavy deformation of the steel structure. 4. There are many reasons for the torsional deformation that occurs in steel structural components after welding, such as unreasonable assembly processes, improper welding sequence, uneven weld gaps, and inappropriate placement of the workpieces. The main reason is the longitudinal and transverse contraction of the weld.
(1) Deformation caused by external forces (2) Deformation caused by internal stresses
1. When the weld is located on one side of the steel structure’s cross-section, bending deformation occurs due to thermal expansion and contraction. 2. When welding steel structures, there are two main reasons for angular deformation: (1) For V-groove joints: the asymmetric shape of the weld cross-section leads to uneven lateral contraction on the upper and lower parts of the weld, resulting in angular deformation; (2) For X-groove joints: an improper welding sequence results in unequal lateral contraction of the welds on the two sides, which also causes angular deformation. 3. During the welding of steel structures, wave-like deformation of the steel components is caused by the combined effect of the following factors. (1) The compressive stress on the thin plate edges caused by the longitudinal shortening of the weld: (2) The angular deformation resulting from the transverse shortening of the weld. Deformation occurs both longitudinally and transversely in the weld, which can result in wavy deformation of the steel structure. 4. There are many reasons for the torsional deformation that occurs in steel structural components after welding, such as unreasonable assembly processes, improper welding sequence, uneven weld gaps, and inappropriate placement of the workpieces. The main reason is the longitudinal and transverse contraction of the weld
1. When the weld is located on one side of the steel structure’s cross-section, bending deformation occurs due to thermal expansion and contraction. 2. When welding steel structures, there are two main reasons for angular deformation: (1) For V-groove joints: the asymmetric shape of the weld cross-section leads to uneven lateral contraction on the upper and lower parts of the weld, resulting in angular deformation; (2) For X-groove joints: an improper welding sequence results in unequal lateral contraction of the welds on the two sides, which also causes angular deformation. 3. During the welding of steel structures, wave-like deformation of the steel components is caused by the combined effect of the following factors. (1) The compressive stress on the thin plate edges caused by the longitudinal shortening of the weld: (2) The angular deformation resulting from the transverse shortening of the weld. Deformation occurs both longitudinally and transversely in the weld, which can result in wavy deformation of the steel structure. 4. There are many reasons for the torsional deformation that occurs in steel structural components after welding, such as unreasonable assembly processes, improper welding sequence, uneven weld gaps, and inappropriate placement of the workpieces. The main reason is the longitudinal and transverse contraction of the weld.
(1) Deformation caused by external forces (2) Deformation caused by internal stresses.