Seismic Design And Safety Countermeasures For Over-limit High-rise Building Projects

With the rapid development of China’s economy and society,the urbanization construction has been accelerating,and high-rise buildings and super high-rise buildings have sprung up.The seismic design methods commonly used in construction projects can no longer meet the seismic requirements of the increasingly diverse high-rise buildings in the current society.How to analyze and compare the seismic performance under various conditions through existing theories and techniques will become the main topic of this paper.This paper uses the software MadisBuilding2016 to analyze the seismic design of the over-constrained building by taking 1# building of the Mingren Square in the east city of Guixi as the research object.In this paper,the seismic response analysis of three different levels is carried out by different softwares.The results show that the structure has appropriate stiffness and meets the requirements of various working conditions.The vibration mode decomposition response spectrum method under small earthquake is calculated and analyzed.It shows that the period,shape,displacement index,stiffness and internal force of the structure under small earthquakes all meet the requirements of the code.The calculation results of the two different procedures are basically the same,and the change rules and forms are identical.The elastic time history response is also carried out.According to the analysis,the shear force at the bottom of each structure is larger than 65% of the calculation results of the mode decomposition reaction spectrum method.The average value of the bottom shear force calculated by the three time history curves is larger than the calculation result of the vibration mode decomposition reaction spectrum method.80% of the time-course analysis method that meets the requirements of the Code for Seismic Design of Buildings(GB50011-2010)shows that the reaction characteristics and variation laws of the structure are basically consistent with the analysis of the above-mentioned mode decomposition reaction spectrum.In addition,this seismic design also carried out static elastoplastic pushover analysis,elastic floor stress analysis,and optimized performance design for key components.The results show that the structure is intact and damage-free under the action of small earthquakes;Damaged;mild damage under the action of large earthquakes,can be used normally with a little repair.The structure can achieve the selected C-class seismic performance design goals.