CAJ | 학술논문

巨型框架有控结构是近几年人们较为关注的一种新型抗震结构体系.该结构横向跨度很大,且很多约束被解除,在竖向地震力下其巨型梁动态特性亟需研究.文章提出附加柱数量、次结构楼层数量及巨型梁抗弯刚度是影响巨型梁动力响应的重要参数.基于非平稳地震作用情形,分别研究了这些参数对巨型梁动力特性的影响.通过三维曲面图直观地描述了不同时间段上巨型梁动力响应受各参数影响的规律.研究结果表明:附加柱数量存在优化值,当附加柱数量是满布时数量的20%～30%时,巨型梁动力性能最好;巨结构动力响应随次结构楼层数增多而增大;巨型梁刚度也存在优化值,但作者建议该值应结合结构的竖向承载力来考虑选取.
거형광가유공결구시근궤년인문교위관주적일충신형항진결구체계.해결구횡향과도흔대,차흔다약속피해제,재수향지진력하기거형량동태특성극수연구.문장제출부가주수량、차결구루층수량급거형량항만강도시영향거형량동력향응적중요삼수.기우비평은지진작용정형,분별연구료저사삼수대거형량동력특성적영향.통과삼유곡면도직관지묘술료불동시간단상거형량동력향응수각삼수영향적규률.연구결과표명:부가주수량존재우화치,당부가주수량시만포시수량적20%～30%시,거형량동력성능최호;거결구동력향응수차결구루층수증다이증대;거형량강도야존재우화치,단작자건의해치응결합결구적수향승재력래고필선취.
Aim. To our knowledge, there is no paper in the open literature dealing with calculating the dynamic response described in the title. Section 1 of the full paper gives the serial-parallel model as shown in Fig. 2. Section 2 points out that the number of additional columns, the number of storeys of sub-structures and the bending rigidity of mega-beam are the three important parameters that have effects on the dynamic response of the mega-beam. Then Section 2 analyzes their effects respectively. Figs. 3(a) and (b) show that when the number of additional columns is 20%～30% of the total number of columns, the vertical dynamic response of the mega-beam is the smallest. Figs. 4(a) and (b) indicate that its vertical dynamic response increases with increasing number of storeys of sub-structures. Figs.5(a) and (b) show that, generally speaking, the increase of the bending rigidity decreases the earthquake resistance of the mega-beam and that, when the rigidity is rather small, it has a short optimal range. The analysis concludes preliminarily that, in designing a mega-beam, an engineer should take into consideration its resistant capacity in the vertical direction.