CAJ | 학술논문

针对目前拱桥抗震性能评估方法的不足以及抗震设计规范的局限性，引入改进的模态往复pushover分析，利用Ghobarah隐式双参数指标进行拱桥结构损伤评估．建立了3组刚架拱结构的有限元模型，拱肋均采用跨度为5.4m的钢管拱肋，桥墩分别为钢筋、钢骨以及钢管混凝土桥墩．对3组刚架拱结构采用倒三角荷载分布形式的侧向力，进行了OBG、SFS、TAR等3条地震波的MMCP法分析和动力时程分析，得到墩顶位移、滞回耗能和损伤指标曲线．研究结果表明：①MMCP法可用于拱结构的抗震性能评估；②MMCP法能够准确地预测拱结构整体的损伤情况；③MMCP法可与桥梁规范的设计反应谱相联系，使评估结果具有一定的普适性、安全度．
침대목전공교항진성능평고방법적불족이급항진설계규범적국한성，인입개진적모태왕복pushover분석，이용Ghobarah은식쌍삼수지표진행공교결구손상평고．건립료3조강가공결구적유한원모형，공륵균채용과도위5.4m적강관공륵，교돈분별위강근、강골이급강관혼응토교돈．대3조강가공결구채용도삼각하재분포형식적측향력，진행료OBG、SFS、TAR등3조지진파적MMCP법분석화동력시정분석，득도돈정위이、체회모능화손상지표곡선．연구결과표명：①MMCP법가용우공결구적항진성능평고；②MMCP법능구준학지예측공결구정체적손상정황；③MMCP법가여교량규범적설계반응보상련계，사평고결과구유일정적보괄성、안전도．
In view of the limitations of current seismic performance assessment methods and the seismic design specifications , a modified modal cyclic pushover ( MMCP ) analysis is introduced in this paper for damage as-sessment in the arch bridge structure by using Ghobarah implicit two-parameter indicator .The finite element (FE) models of three different rigid frame arch structures ( span of arch ribs is 5.4 m) are established, in which the piers are reinforced , steel and concrete , respectively .The lateral force which is distributed as invert-ed triangle is added on the three arc structure FE models and MMCP analysis as well as the dynamic analysis process are performed to analyze three earthquake waves including OBG , SFS, TAR, to obtain the vertex dis-placement , hysteretic energy , and damage indicators curves .The results show that:①MMCP can be applied in seismic performance evaluation of arch structures; ②MMCP can predict the overall damage situation of arc structures accurately;③MMCP can be related to the design response spectrum of bridge specifications , indica-ting that to a certain extent , the assessment results own universality and safety .