消能减震在基于性能的抗震设计中的研究

Study on the Energy Dissipation and Shake-Reduction in PBSD

消能减震设计是基于性能抗震设计的一个实现手段,它是传统的抗震设计的深化,代表了未来抗震设计的发展方向.通过对结构体系的动力计算模型的分析,得出阻尼比对结构的影响至关重要,以简化的方法计算结构的等效阻尼比.通过算例,对钢筋混凝土规则框架进行基本性能目标与重要性能目标的消能减震时程分析.实例分析证明,安装阻尼器后的结构,位移、加速度和层间位移角明显减小,并从投资效益方面作了对比,说明消能减震技术具有较大的实用性.

The energy dissipation and shake-reduction design is one of the PBSD（Performance Based Seismic Design） methods. It deepens the classic seismic structure systems and represents the direction of the future seismic design. The equivalent damping ratio is very important for structure according to analyze the dynamical model of the structure systems. By means of calculating the damping ratio with simplified measures, the damping procedure is illustrated for a regular reinforced concrete frame between the basic performance objective and the important performance objective with time history analyses. Analysis of examples proves that the structure fixed with dampers is capable to reduce the displacements, acceleration and the inter-story drift ratios. Energy dissipation and shake-reduction technology are also practicable according to their economical comparison.