A Comprehensive Performance Improvement Design Method for a Steel Structure Kindergarten’s Seismic Resistance and Ultra-Low Energy Consumption
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摘要: 鉴于幼儿园建筑的高安全性和高舒适性,抗震性能应提升到“中震不坏”的水平,并应适当考虑罕遇地震下的维修便利性。结合北京某钢结构超低能耗幼儿园项目,采用高性能混凝土钢筋桁架板承重体系,提升强度、隔热防水和耐久性能,抗震设计中采用黏滞阻尼器,通过优化消能部件的布置,使双主轴方向变形和附加阻尼接近,主体结构达到“中震不坏”“大震可修”标准。本项目为超低能耗建筑,常规围护系统的设计方法与变形能力不匹配,故采用玄武岩复合纤维一体化外墙板产品,其自重是常规外墙体系的30%,强度可达到200~400 MPa,可以适应1/100的层间变形,与建筑抗震性能匹配,保温性能满足超低能耗建筑的要求,实现设防地震正常使用的标准。同时探索了以抗震性能提升为主导因素、舒适性能提升相适应的双目标综合设计方法。Abstract: Given the critical requirements for both safety and comfort in kindergarten buildings, the seismic performance has been enhanced to ensure the structure remains undamaged under a moderate earthquake, while also incorporating design features for easier repair following a major seismic event. Based on a steel-structural ultra-low energy consumption kindergarten project in Beijing, a high-performance concrete steel bar truss floor system was adopted to enhance structural strength, thermal insulation, waterproofing, and durability. For seismic design, viscous dampers were incorporated. Through optimized layout of energy dissipation components, the stiffness and additional damping ratios were similar in both principal directions. The main structure achieved the performance objective of remaining undamaged under moderate earthquakes and being repairable following major earthquakes. As an ultra-low energy consumption building, the project required that the design method for its conventional envelope system be compatible with the required deformation capacity. To address this, basalt composite fiberintegrated exterior wall panels were employed. They offered a mere 30% of the weight of conventional systems with a compressive strength ranging from 200 to 400 MPa. They accommodated an inter-story drift ratio of 1/100, matching the seismic performance requirements of the building. Their thermal insulation performance also met the requirements of ultra-low energy consumption buildings, enabling the structure to remain functional and undamaged under moderate earthquakes. This paper investigates a dual-objective integrated design approach where the enhancement of seismic performance serves as the primary driver, aligned with the improvement of comfort performance.
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Key words:
- prefabricated building /
- seismic design /
- ultra-low energy consumption /
- building envelope /
- performance
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