The project is located in XXX, with a safety level of XXX. The structural design is reasonable, with a service life of 50 years. The load design reference period is also 50 years, and the seismic fortification intensity is 6 degrees (0.05g, one group). The frame seismic grade is, and the shear wall seismic grade is. To ensure safe use, static load tests were conducted on the reinforced concrete floor of the building structure. Finite element analysis software was used to analyze the performance of the floor. By combining the measured deflection and strain values from the floor load test, a comprehensive assessment was made of the component's performance and whether it meets the design load standards and usage requirements. According to the national standards, specifications, and regulations such as GB/T 50152-2012 "Standard for Test Methods of Concrete Structures" and GB/T 50344-2004 "Standard for Detection Technology of Building Structures," and considering the current condition of the building structure, the construction unit, supervision unit, construction unit, and testing unit determined on-site to conduct static load tests on the floor at the intersection of axes 3-4 with B-C axis on the second floor. The test plan is as follows:
1. Inspection Criteria
1. "Standard for Technical Specifications of Building Structure Inspection: GB/T 50344-2004"
2. "Technical Code for Concrete Compressive Strength Testing by Core Method" CECS 03:2007; 3. "Technical Code for Reinforcement Detection in Concrete" JGJ/T 152-2008; 4. "Code for Load on Building Structures" GB 50009-2001; 5. "Standard for Test Methods of Concrete Structures" GB 50152-2012; 6. Original design documents for the factory, reinforcement design documents, and construction quality documents.
2. Inspection Equipment
PS200 Portable Reinforcement Bar Scanner
2. TST3821E Wireless Static Strain Test Analysis System; 3. Concrete Core Drill Machine
3. Residential Load-Bearing Inspection - Relevant Inspection Items and Plans
(1) Information Survey
1. Drawing and Documentation Survey: Includes construction and structural drawings, construction change records, completion drawings, final quality inspection and acceptance documents, to understand the original design intent, requirements, and technical background; 2. Building History Survey: Includes the original construction and completion dates of the building, renovations, modifications, and expansions during use, changes in use, alterations in usage conditions, and disaster situations, etc.
3. Investigate the building's usage conditions and the internal and external environmental conditions (load history). (ii) Structural inspection content
1. Concrete compressive strength; 2. Reinforcement protective layer thickness measurement of beams and slabs; 3. Beam and slab cross-sectional size inspection; 4. Deflection of components; 5. Displacement at the support; 6. Controlled cross-sectional strain; 7. Appearance and extension of cracks; (Part III) Load-bearing capacity testing plan; 1. Testing objective
The purpose of this floor testing is to ensure safe usage by conducting static load tests on the reinforced concrete floors of the building structure. By using analysis software to evaluate the floor's performance, and combining the measured deflection and strain values from the floor load tests, a comprehensive assessment is made of the component's performance and whether it meets the design load standards and usage requirements.
One, original design and completion drawings, engineering geological reports, drawings of past reinforcement and renovation, accident handling reports, final acceptance documents, and inspection and observation records, etc.
II. Original Construction Conditions
Section 3: Factory Usage Conditions
Four, conduct preliminary verification, inspection, and analysis of the existing information and physical items.
V. Fill out the preliminary survey form. The format of the preliminary survey form should comply with the requirements of Appendix 1 of this standard.
VI. Detailed Investigation Plan. Establish the outline for necessary field measurements, tests, and analyses.
A detailed investigation should include the following:
One, inspection of structural layout, support system, structural members, structural construction, and connection construction.
Section II: Foundation Inspection. Excavation and testing may be required as necessary.
Section 3: Investigative analysis of the structural role, its effects, and the combination of these effects; with necessary field measurements and statistical analysis.
4. Inspection and analysis of structural material properties and geometric parameters, calculation analysis of structural components, on-site measurements, and structural testing if necessary.
With the continuous improvement of the national economic and living standards in recent years, there is now a higher demand for the quality of residential buildings, as well as commercial and industrial buildings. Especially for residential buildings, since they are where the homeowners live, there is an increased focus on whether the residential building safety standards meet the requirements. Many homeowners have found issues with their residential buildings and are taking timely measures to reinforce and maintain them. When conducting engineering reinforcement work, it is imperative to pay attention to safety issues. In the following section, I will provide a detailed introduction to the safety aspects that should not be overlooked during reinforcement construction.
