[摘要] 采用脉动法对两栋钢框架结构房屋的动力特性进行了现场实测,...(国外英文资料).docVIP

[摘要] 采用脉动法对两栋钢框架结构房屋的动力特性进行了现场实测,...(国外英文资料) [Abstract] on the dynamic characteristics of two steel frame building has been measured by pulse method, through the comparison of experimental results and finite element results, on the floor and the effect of infilled walls on the dynamic characteristics of the steel structure of the pure frame structure. Analysis and test results show that the vibration type of multi-storey steel structure frame housing for shear type; damping ratio from 2% to 5%; filling wall significantly reduced the vibration period of frame steel structure, the measured period is less than the calculation cycle, seismic calculation of response calculation cycle reduction. The periodic folded reduction coefficient can be used for reference in engineering design. Key words: dynamic characteristics; measurement; pulse method; cycle reduction coefficient 1 Introduction The dynamic characteristics of the structure refers to the natural period of vibration, vibration and damping structure, is one of the basic properties of the structure, is the basic parameters for seismic calculation. In general, the structure of the self vibration period and vibration type can be determined by calculation, but the calculation does not consider the influence of infill walls and floor slabs and other non structural components on the structural stiffness, makes the calculation cycle is often larger than the actual period of seismic calculation according to the measured period of similar buildings were reduced to the calculation cycle, otherwise the calculated small earthquake. In addition, the damping is only through measured, therefore, field measurement is the basic way to understand the dynamic characteristics of the structure. In the past China Construction steel structure is mainly used in the field of industrial architecture, the main field of civil construction is masonry structure and reinforced concrete structure, the measured data of dynamic characteristics of t