蓝海风中心办公楼动力特性的原位测试及分析  

In situ test on and analysis of dynamic characteristics of Lafonce office building

作　　者：张俊发[1] 王栋 陶磊[2] ZHANGJunfa;WANG Dong;TAO Lei(School of Civil Engieering and Architecture,Xian University of Technology,Xi＇an 710048,China;School of Water Resources and Hydroelectric,Xian University of Technology,Xi＇an 710048,China)

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]西安理工大学水利水电学院,陕西西安710048

出　　处：《西安理工大学学报》2018年第2期134-140,共7页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51279162)

摘　　要：对重要建筑物的动力特性进行原位测试,获得其动力特性参数,可为日后的安全评估或灾后检测积累基础数据,也可为同类建筑物的设计提供参考。采用脉动法对西安一幢新建的超高层建筑——蓝海风中心办公楼的动力特性进行了原位测试,利用各层采集的时域脉动信号,按平均周期图方法对长时记录分多段进行自谱分析或互谱分析,识别出了该结构两个主轴水平向前三阶振型和自振周期、绕竖轴扭转的前三阶周期及竖向的一阶周期,通过半功率带宽法获得了结构的水平向前三阶阻尼比。结果表明:结构的横向基本周期为2.212s,各阶周期比基本处于经验范围之内。振型曲线光滑连续无较大的突变,零点位置符合经验规律。在环境随机激振下,结构水平向前三阶实测阻尼比在2.2%以下,符合规律。To accumulate the basic data for the future safety assessment and the post-disaster detection,as well as provide relevant references for the designing of similar buildings,we can acquire the parameters about dynamic characteristics through in situ test of dynamic characteristic of significant buildings.Dynamic characteristics of a new super high-rise building in Xi＇anLafonce office building are tested in situ by the pulsating method,with the collected time-domain pulsating signals from each floor and the average periodic diagram method used for a long time record of the multi-segment for auto-spectrum analysis or the cross-spectrum analysis,identifying the first three modes and natural vibration periods along the two main axes,the first three natural vibration periods along the vertical shaft torsional,and the first natural vibration period along the vertical direction.The first three damping ratios are obtained by the half-power bandwidth method.The results show that the fundamental period of the structure in transverse direction is 2.212 s,and that each periodic ratio is basically within the empirical scope.The modal curves are smooth and continuous without obvious mutation with the zero-position in accord with the empirical rules.In the random excitation of environment,the first three damping ratios of the structure are below 2.2%in the horizontal direction in accord with the rule.

关 键 词：超高层建筑 动力特性 脉动法 原位测试 频谱分析 

分 类 号：TU973[建筑科学—结构工程]