Carbon Emission Calculation and Analysis of High-Rise Shear Wall Isolation Structure in High Seismic Region Based on Life Cycle Assessment

The carbon emissions of the construction industry are high. In order to achieve China's carbon emission reduction goals, it is necessary to strengthen carbon emission reduction measures. Seismic isolation technology is a powerful tool to reduce carbon emissions, and carbon emission analysis should be added to the architectural design. Chinese seismic isolation building designs focus on safety and economic factors; however, carbon emissions calculations are often overlooked in seismic isolation buildings. This article selects the high-rise shear wall structure in China's intensity zone (9 degrees 0.4g) as the research object and conducts seismic isolation design on it. At the same time, based on the Life Cycle Assessment (LCA) theory, the carbon emissions of seismic isolation structures and non-seismic isolation structures are calculated. The results show that after adopting the seismic isolation scheme, the natural vibration period of the structure is extended by 1.52 times, and the damping coefficient of the seismic isolation structure is 0.44. Under the rare earthquake action, the displacement, compressive stress and tensile stress of the seismic isolation bearing all meet the requirements of the "Code for Seismic Design of Buildings" (GB50011-2016). Based on the LCA theory, the total carbon emissions of the high-rise shear wall structure in the 9-degree area of China can be reduced by about 2.8% in the whole life cycle stage after adopting the seismic isolation scheme; the carbon emissions in the construction materials production and transportation stages are reduced by 10.19%; the carbon emissions of construction and demolition treatment are reduced by 51.76% and 40.72%, respectively. This study provides a valuable reference for calculating the carbon emissions of seismic isolation building designs in China.