MCC Architectural Institute conducted seismic evaluation for a research institute in Shanghai

MCC General Construction Research Institute (Shanghai) Co
, Ltd
accepted the entrustment of a research institute in Shanghai to conduct appraisal and testing on the seismic safety of the complex building of the Institute after housing reconstruction

  After the on-site investigation by the housing inspection engineer of the construction and Research Institute, it is known that the complex building is a three story (partially two story) concrete frame structure
At present, it is planned to carry out renovation and adjustment of building layout
After renovation, the building surface base is about 3749m²
In order to understand the anti-seismic safety of the house after reconstruction, it is proposed to carry out resistance appraisal, so as to provide technical basis for subsequent reconstruction design and reinforcement design
According to the inspection: 1
The main load-bearing components of the house are basically intact without obvious structural damage and durability damage
There are water seepage, hollowing and falling off of the painting layer in some rooms of the house
Many inclined cracks caused by horizontal load or uneven settlement are found on the partially filled wall of the house
2
The original design concrete strength grade of the room is C25
Through the rebound test and coring test, the measured concrete strength grade basically meets the original design requirements
It is suggested that the strength grade of concrete should be C25 in the original design when checking the bearing capacity
3
The measurement results of house inclination and height difference show that the overall inclination rate of the house is within the allowable range of the code, but there is a certain degree of uneven settlement between adjacent column bases
4
The results of checking calculation and grading show that the reinforcement of some columns and beams of the house after reconstruction can not meet the requirements, and the elastic deformation under frequent earthquakes can meet the requirements of the code
According to Shanghai housing quality inspection procedures and relevant national housing inspection standards, such as: 1 Code for engineering construction of Shanghai code for quality inspection of buildings dg/tj08-79-20082 Shanghai standard "standard for inspection and evaluation of existing building structures" dg/tj08-804-20053 Shanghai code for engineering construction code for seismic design of buildings dgj08-9-20134 Shanghai Standard Code for seismic evaluation and reinforcement of existing buildings dgj08-81-20005 Standard for reliability evaluation of civil buildings gb50292-19996 Load code for the design of building structures gb50009-20127 Code for design of building foundation gb50007-20118 Technical specification for testing compressive strength of concrete by rebound method jgj/t23-20119 Technical specification for testing concrete strength by core drilling method cecs03-200710 Code for measurement of building deformation jgj8-200711 Code for design of concrete structures gb50003-201112 Code for seismic design of buildings gb50011-201013 Standard for seismic evaluation of buildings (gb50023-2009); MCC construction and Research Institute carries out follow-up inspection on the inclined deformation and uneven settlement of buildings; Strengthen the construction with insufficient bearing capacity in combination with the building reconstruction construction; The original load-bearing structural members shall not be damaged in the process of building reconstruction; The subsequent use of the house shall be subject to routine inspection, and the inspection report of the other party shall be provided according to the analysis of the monitoring data
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