CAJ | 학술논문

首先输入多条实际竖向地震记录,用时程分析考察了塔楼高度和连体跨度不同的多个算例.然后将其抽象成塔楼和连体桁架组成的双自由度体系,运用频域分析方法,得到竖向地震作用的变化规律:1)随着桁架对塔楼频率比增加,连体地震放大作用越明显;2)当连体对塔楼质量比较小且两者频率比相近1,连体地震反应进一步加强.现行抗震规范的重力系数法提出的大跨度结构竖向地震的实用计算公式对于本文研究结构并不完全适用.提出考虑塔楼和桁架协同地震作用的实用算式,并对一个超高层工程实例进行竖向地震作用分析,与时程分析结果吻合较好.
수선수입다조실제수향지진기록,용시정분석고찰료탑루고도화련체과도불동적다개산례.연후장기추상성탑루화련체항가조성적쌍자유도체계,운용빈역분석방법,득도수향지진작용적변화규률:1)수착항가대탑루빈솔비증가,련체지진방대작용월명현;2)당련체대탑루질량비교소차량자빈솔비상근1,련체지진반응진일보가강.현행항진규범적중력계수법제출적대과도결구수향지진적실용계산공식대우본문연구결구병불완전괄용.제출고필탑루화항가협동지진작용적실용산식,병대일개초고층공정실례진행수향지진작용분석,여시정분석결과문합교호.
To investigate vertical seismic responses of space corridors built between twin-connected-tower tall buildings, first time history analysis is applied with the input of vertical earthquake records, and the examples have varying tower heights and truss spans. Secondly, this type of structure is simplified as a 2-DOF system and analyzed in frequency domain, and the dynamic characteristics of its vertical seismic response are studied. The gravity coefficient method adopted by current China code for seismic design of buildings may not lead to safe results for the studied corridors. A practical design formula considering interaction between towers and corridors is suggested. A project example with truss at the top of a twin-tower super-tall building is analyzed with the suggested method and the time history method, and the results coincide well.