Abstract
With the expansion of the urban areas and the rapid growth of the urban population, the disposal of large amounts of domestic waste has become a problem faced by large cities. To solve this problem, many MSW incineration power plants have been continuously built. As a typical large-span spatial structure of waste incineration power plant, how to achieve economic, beautiful, and environmentally friendly design goals under the premise of meeting the requirements of the production process is an important problem currently facing. In this paper, a structural design optimization method based on damage index is proposed. Taking a large-span mixed structure of a MSW incineration power plant as an example, the paper firstly uses the dynamic elastic-plastic time history analysis method to evaluate its seismic performance, and then optimizes the structure according to the damage degree of the structure under small and large earthquakes design. The results show that under the premise of meeting the requirements of the code, this method can ensure that the degree of structural damage under the earthquake remains almost unchanged, while significantly reducing the amount of building materials and reducing the cost. At the same time, this method is more direct, simple, and effective than optimization design methods based on experience and internal forces of structural members.
Highlights
With the development of large-scale, complicated, and diversified civil engineering structures, structural optimization design becomes more and more important, especially for large-span spatial structures with complex shapes
The building adopts a steel structure-reinforced concrete-shear wall hybrid structure. This project is based on the 8-degree seismic fortification intensity to conduct dynamic elastic-plastic time history analysis Fig. 1(b)
The dynamic elastic-plastic analysis method based on explicit integration will be used in this project
Summary
With the development of large-scale, complicated, and diversified civil engineering structures, structural optimization design becomes more and more important, especially for large-span spatial structures with complex shapes. Large-scale public buildings at home and abroad are premised on large-span spatial structures, ranging from sports buildings directly related to the people’s physical and mental health, to exhibition buildings that promote information exchanges, to large-scale transportation buildings, entertainment facilities, These large-scale public buildings, such as theaters and music academies, require a large-span structural system to support them [1]. Based on the dynamic elastic-plastic time analysis of a large-span structure under the fortification intensity of 8 degrees, the structure is optimized and the seismic performance and economic efficiency of the structure before and after optimization are systematically compared
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