CAJ | 학술논문

以采用钢筋混凝土桥墩和钢-混凝土组合梁的组合刚构桥为研究对象，在OpenSees平台上对组合刚构桥分别进行了横桥向和顺桥向静力弹塑性分析和时程分析，评价了按一阶模态荷载进行静力弹塑性分析的适用性，提出了可以考虑高阶振型影响的静力弹塑性分析方法，并分析了该方法对组合刚构桥横桥向和顺桥向的适用性。在此基础之上，考虑双向地震作用影响对弹塑性需求曲线进行折减，提出了预测组合刚构桥在任意方向输入的水平双向地震作用下位移响应的静力弹塑性分析方法，分析结果表明该方法有足够的保证率。
이채용강근혼응토교돈화강-혼응토조합량적조합강구교위연구대상，재OpenSees평태상대조합강구교분별진행료횡교향화순교향정력탄소성분석화시정분석，평개료안일계모태하재진행정력탄소성분석적괄용성，제출료가이고필고계진형영향적정력탄소성분석방법，병분석료해방법대조합강구교횡교향화순교향적괄용성。재차기출지상，고필쌍향지진작용영향대탄소성수구곡선진행절감，제출료예측조합강구교재임의방향수입적수평쌍향지진작용하위이향응적정력탄소성분석방법，분석결과표명해방법유족구적보증솔。
The pushover analysis and time history analysis of a steel-concrete composite rigid frame bridge which is composed of RC piers and steel-concrete composite beams was conducted in the longitudinal and transverse directions of bridge by using the platform of OpenSees,and the applicability of pushover analysis on the the bridge under first modal load was discussed as well.Besides,a new pushover analysis method which can consider the contribution of higher modes of vibration was proposed,and the applicability of this method in analysing the vibration in transverse and longitudinal directions of the composite rigid frame bridge was also concerned.On this basis,a reduction coefficient of elas-to-plastic demand curve which can consider the influence of bidirectional seismic excitations was proposed,and a new pushover analysis method to predict the largest displacement of composite rigid frame bridges under bi-directional seismic excitations was proposed as well.It is also confirmed that the method is conservative.