Numerical Analysis and Study of the Dynamic Response of Structural Systems for Machinery Foundations  

作　　者：Douglas M.C.Rodrigues Rodrigo B.Burgos JoséGuilherme S.da Silva 

机构地区：[1]Civil Engineering Graduate Programme(PGECIV),State University of Rio de Janeiro(UERJ),Rio de Janeiro,20550-900,Brazil [2]Structural Engineering Department(ESTR),State University of Rio de Janeiro(UERJ),Rio de Janeiro,20550-900,Brazil

出　　处：《Journal of Civil Engineering and Architecture》2020年第11期595-602,共8页土木工程与建筑（英文版）

摘　　要：This work aims the deterministic dynamic analysis,in the time and frequency domain,of a reinforced concrete floor supported by a pre-cast pile foundation system,when subjected to the excitation produced by a large compressor installed in an industry for the production of air gases.The concrete slab presents a dimension of 12 m×15 m,required to support a compressor-motor assembly weighting 1,900 kN and positioned at a height of 4m of the investigated concrete floor.In this investigation,two numerical models were developed and the difference between these models is characterized by the discretization of the support points(pre-cast concrete piles).The developed numerical model adopted the usual mesh refinement techniques present in finite element method simulations implemented in the CSi SAP2000 V.17.2.0 software.Based on the developed analysis methodology,the dynamic structural response of the foundation system is evaluated in terms of natural frequencies,vibration modes,displacements,velocities,and accelerations.The maximum values of the dynamic response of the system are compared with the limit values recommended by standards and project recommendations,aiming a careful evaluation,regarding the performance of the structure in terms of excessive vibrations and the economic aspects involved in the design of the foundation system.Finally,the obtained results of the two developed numerical models are compared,as to evaluate if there are benefits in refining the support points modelling.

关 键 词：Machinery foundation structural dynamics numerical analysis 

分 类 号：TU5[建筑科学—建筑技术科学]