两空间结构风致内压的复特征值分析  

COMPLEX EIGENVALUE ANALYSIS OF WIND-INDUCED INTERNAL PRESSURES FOR A TWO-COMPARTMENT BUILDING

作　　者：刘海明[1] 张承 王旭[3] 余先锋[1,4] LIU Haiming ZHANG Cheng WANG Xu YU Xianfeng(State Key Laboratory of Bridge Engi. Structural Dynamics, China Merchants Chongqing Communication Research ＆ Design Institute Co. , Ltd. , Chongqing 400067, China Shenzhen Bridge Design ＆ Research Institute Co. , Ltd. , Shenzhen 518052, China State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engi. , Chongqing Jiaotong Univ. , Chongqing 400074, China School of Civil Engi. and Transportation, South China Univ. of Technology, Guangzhou 510640, China)

机构地区：[1]招商局重庆交通科研设计院有限公司桥梁工程结构动力学国家重点实验室,重庆400067 [2]深圳市桥博设计研究院有限公司,深圳518052 [3]重庆交通大学山区桥梁与隧道工程国家重点实验室培育基地,重庆400074 [4]华南理工大学土木与交通学院,广州510640

出　　处：《低温建筑技术》2017年第4期25-27,59,共4页Low Temperature Architecture Technology

基　　金：桥梁工程结构动力学国家重点实验室开放基金(201601);桥梁结构抗震技术交通行业重点实验室开放基金(201601)

摘　　要：对Sharma提出的两空间结构风致内压线性控制方程组进行复特征值分析,获得了"结构-内压"系统自振频率与阻尼比的表达式。通过典型数值算例,计算分析了系统的自振频率、阻尼比随迎风墙和隔墙开洞面积的变化规律。结果表明,在不同的迎风墙与隔墙开洞面积下,"结构-内压"系统的自身阻尼较小。随着迎风墙面开洞面积的减小,第一阶振型阻尼比急剧增大,但第二阶振型阻尼比基本保持不变;随着隔墙开洞面积的增大,前两阶阻尼比均呈递减趋势。The effects of wind-induced internal pressure on a two-compartment building with opening cannot be neglected. In this paper, the complex eigenvalue analysis of the non-linear equations proposed by Sharma was conducted. Then, the expressions of natural frequency and damping ratio for the internal pressure-building system were obtained. Finally, the changing tendency of natural frequency and damp- ing ratio with the opening areas of wind-ward and partition walls were studied by using a typical numeri- cal example. The results show that the damp of the system is rather small in case of different opening ar- eas of wind-ward and partition walls. With the decrease of the opening area of wind-ward wall, the first- order damping ratio rapidly increases, but the second-order damping ratio keeps unchanged. Additionally, the two orders damping ratios present a decreasing tendency with the increase of the opening area of partition wall.

关 键 词：两空间结构 开孔 风致内压 复特征值分析 

分 类 号：TU312.1[建筑科学—结构工程]