Fragility analysis of passive energy dissipation structures based on performance spectra design
The essence of building resilient cities lies in their ability to repair and self-repair after disasters.Energy dissipation and seismic mitigation technology offer innovative approaches to im-proving urban resilience and promoting sustainable development.This paper introduces a per-formance-based design method suitable for low-to medium-rise frame structures equipped with supplemental damping devices.Using the performance spectra design method,the structural response can be controlled by adjusting the damping parameters,structural response,and ground motion parameters.The proposed method was used to design a six-story Benchmark steel frame structure.The vulnerabilities of the structure were analyzed under different damage states before and after the seismic design,considering both far-field and near-field ground motions,with and without pulse-like effects.Results showed that in the elastic stage,structural responses under near-field nonpulse and pulse-like ground motions were essentially the same and slightly larger than those under far-field ground motions.In the elastic-plastic and collapse stages,structural responses under near-field nonpulse ground motions were greater than those under far-field ground motions.Near-field pulse-like ground motions were found to be more likely to cause struc-tural damage or even collapse compared to far-field and near-field non-pulse ground motions.The study revealed that the collapse resistance of the structure designed using the performance spec-trum seismic design method improved by 44.8％,43.8％,and 45.6％under far-field,near-field non-pulse,and near-field pulse-like ground motions,respectively.This indicates that the pro-posed method is weakly affected by changes in ground motion records.
万方数据
维普
