设计应注意的问题（Design should pay attention to the problem）.doc

设计应注意的问题（Design should pay attention to the problem） Problems to be noticed in concrete structure design 1. the seismic grade selection error of concrete structure. 2. no definite number or elevation of bottom reinforcement zone. 3. the high-rise building structure with transfer floor at the bottom and the strengthening part at the bottom of the shear wall. According to the technical specification for concrete structure of high-rise building Cheng, JGJ3 - 2002, section 10.2.4: a high-rise building with a transfer floor at the bottom. The height of the reinforcement at the bottom of the shear wall can be removed The height of the supporting layer and the height of the two layers above the frame support layer and the total height of the wall limb are the larger values of the 1/8 two. 4. the restrained edge component is not consistent with the technical specification for concrete structures of high-rise buildings, JGJ3 - 2002 7.2.16 strip. (including stirrups and length of Lc) 5. top plate negative reinforcement with 6@200, does not comply with the code for design of concrete structures GB50010--2002 10.1.7. For: Branch The cast-in-place concrete slabs which are integrally cast or embedded in the load-bearing masonry walls shall be equipped with reinforcing steel bars along the supporting periphery The diameter shall not be less than 8mm, the spacing shall not be greater than 200mm, and the following requirements shall be met:... 6. large span beams and plates do not carry out the calculation of cracks. 7. when calculating, the seismic shear force of frame columns in frame shear structure, frame core tube structure and frame supported shear wall structure should be based on the high-rise Technical regulations for building concrete structures, JGJ3 - 2002, 8.1.4, 9.2.3 and 10.2.7 are adjusted. 8. the problem of wall pulling reinforcement: the spacing of tension bars is not the multiple of the distribution bars. Lambda /2 (including constrained edge elements of seismic w