How to do a good job in the special review of seismic fortification of overrun high rise building pr

What are the special regret review projects for seismic fortification of overrun high-rise building projects?

1.Basic information (including: construction unit, project name, construction site, construction area, declaration date, survey unit and qualification, design unit and qualification, contact person and method, etc.).

2.Seismic fortification standards (including: fortification intensity or design parameters, seismic fortification classification, etc.).

3.The basic data of the survey report (including: site type, equivalent shear wave velocity and cover thickness, liquefaction discrimination, bearing layer name and burial depth, foundation bearing capacity and foundation scheme, unfavorable lot evaluation, etc.).

4.Foundation design overview (including: foundation type of main building and podium, foundation burial depth, thickness of basement floor and roof, pile type and monopile bearing capacity, main cross-section of cushion cap, etc.).

5.Layout and selection of building structure (including: height and number of floors of the main building, height and number of floors out of the roof, height and number of floors of the podium; Shockproof seam setting; the regularity of the floor plan and vertical orientation of the building; whether the structure type is complex or special; the size and structural form of the roof of the large spatial structure; seismic rating of concrete structures, etc.).

6.Structural analysis key results (including: computational software; Total shear force and periodic adjustment coefficient, total gravity of structure and shear coefficient, vertical stool jock value; the basic period in the direction of the vertical and horizontal torsion; maximum layer displacement angle and position, torsional displacement ratio; the maximum axial compression ratio of frame columns and walls; The maximum shear compression ratio of the component and the stress ratio of the steel member are coarse; floor stiffness ratio; the role of the framework part; The waveform and quantity of the time-history method, the comparison of the results of the time-history method and the response spectrum method, and the displacement of the seismic isolation support; large-scale spatial structure, roof stability, etc.).

7.Seismic structures designed beyond limits (including: the highest and lowest material strength of concrete, rebar, and steel for structural components; the maximum and minimum cross-sections of beams and columns in key parts, and the maximum and minimum thicknesses of key walls and cylinders; stub column distribution range; the main structures of split-layers, conjoined bodies, conversion beams, conversion trusses and reinforcement layers; The cross-sectional form and basic connection structure of key steel structural components; steel content and structure of steel reinforced concrete columns, etc.).

8.Questions to focus on (including: a brief description of performance design objectives; The main strengthening measures for the design of overrun engineering, the problems to be solved, the test results, etc.).

The structural calculation and analysis model and calculation results shall meet the following requirements:

1) Through the changes in the force distribution of each part of the structure, as well as the position and distribution characteristics of the maximum interstory position such as stool shift, the unfavorable situation of the force characteristics of the structure is judged.

2) The ratio of the total shear force of the structure and the shear force of each layer to the representative value of the total gravity of each layer above should meet the requirements of the seismic code, and the class site should be appropriately increased.

3) The horizontal and vertical ** waves used in the analysis of the time history of the structure should meet the requirements of the code, and the duration is generally not less than 5 times the basic period of the structure; In general, the average value of multiple waves is taken for the results of elastic time history analysis, and the envelope of multiple waves should be taken when there is a lot of superheight or complex body size.

4) The value of the adjustment coefficient of the shear force of the weak layer and the internal force of the non-landing member to the horizontal conversion member should be greater than the specified value of the specification when it is over-high; The control value of the floor stiffness ratio still needs to meet the requirements of the code.

5) The horizontal conversion components of the upper wall such as the side door openings should be strengthened according to the specific situation; If necessary, it is advisable to use the manual calculation review under gravity load without considering the joint work of the wall.

6) The vertical orientation of the connector should be adopted with reference to the results of the analysis of the vertical travel time.

7) In the steel structure and steel-concrete structure, the shear force borne by the steel frame part should be appropriately increased according to the degree of overrun than the provisions of the specification.

8) If necessary, static elastoplastic analysis or dynamic elastoplastic analysis should be used to determine the weak parts.

9) If necessary, there should be a simulation analysis of the structure under gravity load.

10) When there are obvious doubts about the calculation results, a special review should be carried out.

Legal grip rotten analysis:

The provincial, autonomous region, and municipality directly under the central government where the overrun high-rise building project is located is responsible for organizing the provincial, autonomous region, and municipality overrun high-rise building project seismic fortification expert committee to conduct a special review of the seismic fortification project of the overrun high-rise building section leakage.

The law is based on slippery evidence:

Regulations on the Management of Seismic Fortification of Overrun High-rise Building Projects

Article 4 Effective seismic measures shall be taken to ensure that the overrun high-rise building projects meet the seismic fortification objectives specified in the code.

Article 5 When carrying out the construction of overrun high-rise building projects in the seismic fortification area, the construction unit shall, in the preliminary design stage, submit a special report to the people's construction administrative departments of the provinces, autonomous regions and municipalities directly under the Central Government where the project is located.