CAJ | 학술논문

合理选取四类场地320条强震记录，研究地震动特性及恢复力模型动力参数对弹塑性位移谱与残余位移谱影响。结果表明，给出某一标准设防烈度的弹塑性反应谱，其它设防烈度下弹塑性反应谱可据 PGA设防烈度与 PGA标准烈度比值调整获得；可忽略屈服后刚度比对弹塑性位移谱影响，但应选择偏于保守的屈服后刚度比统计残余位移谱，由此建立的残余位移谱只适用短周期、低延性一般规则桥梁中、低矮桥墩的抗震设计；阻尼比与位移延性比为影响弹塑性位移谱及残余位移谱重要因素，阻尼比增大会减少桥梁非弹性变形及震后残余位移。基于该结果建立适用于我国梁式桥抗震设计的弹塑性及残余位移谱，为考虑残余位移影响的梁式桥基于性能的抗震设计提供重要参考依据。
합리선취사류장지320조강진기록，연구지진동특성급회복력모형동력삼수대탄소성위이보여잔여위이보영향。결과표명，급출모일표준설방열도적탄소성반응보，기타설방열도하탄소성반응보가거 PGA설방열도여 PGA표준열도비치조정획득；가홀략굴복후강도비대탄소성위이보영향，단응선택편우보수적굴복후강도비통계잔여위이보，유차건립적잔여위이보지괄용단주기、저연성일반규칙교량중、저왜교돈적항진설계；조니비여위이연성비위영향탄소성위이보급잔여위이보중요인소，조니비증대회감소교량비탄성변형급진후잔여위이。기우해결과건립괄용우아국량식교항진설계적탄소성급잔여위이보，위고필잔여위이영향적량식교기우성능적항진설계제공중요삼고의거。
With 320 strong ground motion records of four sites appropriately selected,the elasto-plastic dynamic analysis was performed to study the effects of characteristics of earthquake motions and dynamic parameters of a restoring force model on elasto-plastic displacement spectra and residual displacement spectra.The study results showed that elasto-plastic response spectra of other protected earthquake intensity can be obtained by adjusting elasto-plastic response spectra of a standard protected earthquake intensity according to the ratio of PGA for protected earthquake intensity to PGA for standard protected earthquake;effects of yielding rigidity ratio on elasto-plastic displacement spectra can be neglected,but conservative yielding rigidity ratio is chosen to establish residual displacement spectra which can be applied in low and medium-height piers'aseismic design of general regular bridges with short natural periods and low ductility;elasto-plastic displacement spectra and residual displacement spectra are affected obviously by both damping ratio and ductility,elasto-plastic displacements and residual displacements of bridge decrease with increase in damping ratio.Based on the above results,the elasto-plastic displacement spectra and residual displacement spectra applicable to aseismic design for Chinese bridges were established.They provided an important guidance for performance-based aseismic design of beam bridges considering the effects of residual displacements.