消能减震结构能量设计方法研究
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摘要
基于能量分析的消能减震结构设计方法是未来抗震设计的发展方向,但是如何将基于能量的设计方法应用于实际工程中,还有许多工作要做。综合考虑现行抗震设计规范,以实现中震弹性为目标,提出了一种基于弹性的消能减震结构能量设计方法。该方法首先以能量反应谱研究成果为基础,提出了适用于我国的能量反应谱。通过能量反应谱计算结构总输入能,然后设定阻尼器附加给结构的有效阻尼比并估算出需阻尼器耗散的能量,进而计算阻尼器的数量。通过一个实例具体说明了该方法的设计流程。分析结果表明,该设计方法减震效果显著,能够实现中震弹性的要求。
The energy dissipation structural design based on energy analysis method is a developing trend in the structural seismic design. But much work still remains to be done for applying energy- based design to practice. By comprehensive consideration of the current seismic design specifications and aiming to realizing the elastic under medium earthquake,we propose a design method of energy dissipation structures based on elasticity. A response spectrum of energy suitable for China is suggested by referring to the energy spectrum research data. The total input energy is calculated through the response spectrum of energy,and the effective damping ratios attached to the structure is set up to estimate the energy dissipated by the dampers,so the quantity of dampers could be determined. The design process is demonstrated through a practical example. The analysis results show that the design method is effective in energy dissipation,and can fulfill the basic elastic requirement.
引文
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