Papers by Keyword: Response Spectrum Analysis

Abstract: This paper presents a comparative seismic performance evaluation of reinforced concrete (RC) buildings Fiber-reinforced elastomeric isolator (FREI), and fiber-reinforced nanocomposite elastomeric isolator (FRNEI) configurations using Response Spectrum Analysis (RSA) in ETABS, following ASCE 7‑22 provisions. A regular G+8 RC moment-resisting frame was analyzed under Site Class D conditions, with isolator properties corresponding to a 67 kN axial load case derived from experimental data. Response parameters such as maximum lateral displacement and story shear in both principal directions were examined to quantify the influence of isolation stiffness on seismic demands. Results indicate that both FREI and FRNEI systems substantially reduce story shear compared to the fixed base, with FREI producing larger base displacements and FRNEI achieving additional reductions in both displacement and shear due to its higher lateral stiffness and improved damping, as nano clay is used as a nanocomposite material. The findings confirm that FRNEI offers a more balanced performance, effectively limiting deformation while maintaining isolation benefits, thereby enhancing the seismic resilience of mid-rise RC buildings.

Abstract: Material property that can describe its behavior under repetitive impact is an important data for the design and failure analysis of any engineering part. Study of this behavior by measuring the size of apparent damaged area at the surface (crater depth) and tracking the damage intensity is extremely difficult for small area. An attempt to develop the understanding of different response behavior during repetitive impact of stainless steel was made in this work. This paper presented the relation of the response signal to the contact surface condition in the repetitive impact test by mean of spectrum analysis. Acceleration response of a specimen under impact load could be affected by contact condition since contact area and local thickness of the specimen could be changed. The testing machine was developed to provide the repetitive impact force to the specimen. Surface morphology and depth of the crater were captured by optical microscope and 2D-stylus profilometer. The appearance in the peak spectrum amplitude of a response signal was found to be a noticeable response behavior that can differentiate the damaged specimen from the healthy specimen. Results of the response spectrum gave a clear relation to the damage intensity of the specimen. The increase in the peak amplitude during the number of impact cycles was found in the damaged specimen while the non-damaged specimen conditions the peak amplitude of the response is constant throughout the test.

Abstract: Keywords: Earthquake, Internal Forces, Displacement, Response Spectrum Analysis, Time History Analysis, PoundingAbstract. Teaching Hospital is an educational facilitiy for students in the Faculty of Medicine and also as a health services for the general public. The hospital building must be built in accordance with earthquake-safe building standards, so that buildings are not damaged in an earthquake. Andalas University Hospital was built at Padang in 2014 which was designed using Indonesian Seismic Code SNI 03-1726-2002 with quakes zone 6. Since 2012, a new Seismic Code, SNI 1726-2012, was issued and all the buildings should be designed by using the new code. Therefore, the authors are interested in analyzing the structural response of the hospital building by using new seismic code SNI 1726-2012. The results, then, were compared with the responses of the structure which calculated by using SNI 03-1726-2002.The results of analysis show that the structural responses in the internal forces and displacement by using SNI 1726-2012 was higher than those using SNI 03-1726-2002. In this study, an analysis of potential Pounding was also conducted by using dynamic analysis Time History method. The analytical result shows that there is no pounding between adjacent buildings at Andalas University Hospital Buildings.

Abstract: According to a intake tower of spillway tunnel established the intake tower structure—water—foundation 3-D finite element model for seismic analysis, by the response spectrum method in original design seismic parameters and new parameters of the project on horizontal and vertical dynamic response of the intake tower. The results shown that the structure of maximum dynamic stress concentration appeared near the junction of the tower with backfill concrete, where the weak parts of seismic, used the new seismic parameters calculated show greater damage on the tower, but couldn’t overturn, meet the seismic design requirements.

Abstract: In this paper, based on the theories of truss structure with the characteristics of the aqueduct structure, puts forward a new type of aqueduct structure system, the cable pretensioned truss structure under the use of state for the key point’s response spectrum analysis and elastic time history response analysis. The stresses induced by the analysis of structure of key parts are meeting the requirements of the current specifications, in the flexible working state. Pretensioned steel in this paper, the research aims to the whole assembly of the aqueduct structure characteristics and the theoretical analysis of the dynamic characteristics of this kind of structure design for the future research and provide some reference, so as to promote the new application and development in the form of aqueduct.

Abstract: In this paper, based on the Midas/gen platform, a three-dimensional finite element model (FEM) for a transfinite stadium with a large-span and large-cantilever roof , located in Shenyang, was used to study its potential responses to seismic activities. In the numerical analysis, an earthquake spectrum stipulated by the Chinese Seismic Code (GB50011-2010) was adopted to calculate the bidirectional horizontal displacements by the Complete Quadratic Combination (CQC) method on the basis of the response spectrum analysis. The computational results indicate that the maximum displacements in both of the two horizontal directions locate at the top of this structure, i.e. the transfinite part of the roof.

Abstract: Anti-seismic property was essential in the progress of bridge designing and construction due to destructive power of earthquake disaster and increasing span of bridge. This paper elaborated theory method of analysis, taking five spans continuous cable-stayed bridge which was half floating system as an engineering background, and using method of special finite element analysis to calculating dynamic characteristics and seismic response respectively which also considered longitudinal limit damping and stiffness of cable under longitudinal, transverse, vertical and three-dimensional seismic oscillation. Fundamental frequency of cable-stayed bridge was affected significantly with considering longitudinal limit damping, so connection measures would be determined reasonably in designing and analyzing anti-seismic property of long-span cable-stayed bridge. When response spectrum analysis was adopted, longitudinal and vertical displacement were larger than lateral displacement under longitudinal seismic oscillation, lateral seismic oscillation only affected the structural lateral displacement, and vertical seismic oscillation affected vertical and longitudinal displacement.

Abstract: Based on a long-span PC composite box-girder bridge with corrugated steel webs, the dynamic characteristics and seismic behavior of finite element model built by Midas Civil is analyzed through response spectrum method. The results show that the first natural frequency is vibration of inner surface mainly for the main span and it meets the demand of two-stage seismic design.

Abstract: In this paper, three-tower cable-stayed bridge Jinan Jianbang as the researched object, is to built to two models of the bridge with piles and without piles using the finite element software , and is made dynamic characteristic analysis. Meanwhile it is compared the control force of and the elastic response spectra and time history analysis under different conditions.At the same time ,bridge model without pile is excitated by multi-point for traveling wave effect analysis. The results show that pile-soil effects make more greater impact on forces of large span structures, and traveling wave effect on the adverse effects of large-span cable-stayed bridge shoule be considered in the seismic design.

Abstract: The stress, deformation and stability for the intake tower of a water release integrated structure under the normal storage water level and operational basis earthquake load case are investigated using the three dimensional finite element method. The response spectrum analysis is adopted to study the seismic response of the intake tower. Special attention is paid to the weak zones of the structure and foundation. The safety evaluation of the intake tower is performed based on the computational results.