Earthquake Resistant Design Method of Inelastic Structures with Earthquake Energy Partioning

利用能量概念提出了新的地震能谱，为实际设计程序提供参考。谱显示了给定自然周期和阻尼比下单位质量的综合地震输入能量。用传统的模态分析方法和提出的谱可以计算复杂结构的总输入能量及其分配。对非弹性结构进行了数值模拟，揭示了地震能量在时间和空间上的分配。研究了带隔震器和不带隔震器的桥梁结构在地震动作用下的非弹性地震反应和地震能量分配。通过对原钢筋混凝土结构和修复后钢筋混凝土结构进行在线混合地震反应加载试验，发现滞回吸收能是衡量结构损伤的最佳准则。从分析和实验结果出发，提出了地震能量分配的抗震设计新方法。

New earthquake energy spectra are proposed for practical design procedures using energy concepts. The spectra show integrated earthquake input energy of a unit mass for a given natural period and damping ratio. The total input energy and its partitioning in complex structures can be evaluated with conventional procedure of modal analysis and the proposed spectra. Numerical simulations are carried out for inelastic structures to show the earthquake energy partitioning in time and in space. Inelastic earthquake response and earthquake energy partitioning of bridge structures with and without sjismic isolators subjected to earthquake ground motions is evaluated. From the on-line hybrid earthquake response loading tests of original and repaired RC structural members, the hysteretic absorbed energy is found to be the best criteria to measure structural damage. From the analytical and experimental results, the new earthquake resistant design method with earthquake energy partitioning is proposed.