Earthquake Resistant Design Code (GB50011-2010)
The Earthquake Resistant Design Code (GB50011-2010) is an important standard in the field of construction engineering in China. The development of the code aims to ensure the safety of buildings in the event of an earthquake, and reduce the loss of people's lives and property in the event of an earthquake disaster. This article will introduce the code in detail and provide some operational steps for seismic design.
Overview of the code
GB50011-2010 Seismic Design Code is an important standard in China's construction engineering field, which is formulated on the basis of long-term research and practical experience of earthquake disasters in China. The code is applicable to the seismic design of buildings, bridges, tunnels, embankments and other projects. The specification contains seismic intensity, design basic seismic action and its combination, basic requirements for seismic design, structural seismic design, determination of defensive ground vibration parameters, ground vibration input, ground vibration analysis, ground vibration response, and ground vibration test.
Operational steps for seismic design
Seismic design is a complex task that requires following certain operational steps. The following are some of the commonly used steps:
1. Risk assessment
Before carrying out seismic design, it is necessary to carry out a risk assessment of the geographic location of the building. The content of the assessment includes regional seismic intensity, geological conditions, and building use conditions. The results of the assessment will determine the seismic class and design criteria of the building.
2. Design of basic seismic actions and their combinations
Based on the results of the risk assessment, the seismic class and design criteria of the building are determined. Then according to the formula in the code, calculate the design basic seismic action and its combination.
3. Structural seismic design
The seismic design of the structure is based on the design basic seismic effects and their combinations. The design needs to consider the stiffness, strength, stability and other factors of the structure.
4. Determination of ground shaking parameters
Determination of ground shaking parameters according to the requirements of the code. Defensive ground vibration parameters include seismic intensity, ground vibration parameters, ground vibration time course and so on.
5. Ground Vibration Input
Earthquake parameters are input into the ground vibration analysis software for ground vibration input.
6. Ground Vibration Analysis
Ground vibration analysis is performed to calculate the response of the structure under seismic action.
7. Ground Vibration Response
Based on the results of the ground vibration analysis, determine if the structure meets the requirements of the code. If it does not, the structure needs to be optimized.
8. Ground Vibration Test
The ground vibration test is conducted to verify the seismic performance of the structure.