Abstract An analytical model for high damping elastomeric isolation bearings is presented in this paper. The used to describe mathematically the force and restoring of rubber material bearing. Ten parameters be identified from cyclic loading tests are included model. sensitivity ten affecting examined. These functions a number influence factors on elastomer such as compound, Mullins effect, scragging frequency, temperature axial load. In study, however, only frequency investigated. Both...

Abstract In this study, signal processing approaches and nonlinear identification are used to measure seismic responses of reinforced concrete (RC) structures using the shaking table test. To analyze structural nonlinearity, an equivalent linear system with time‐varying model parameters, singular spectrum analysis elucidate residual deformation, wavelet packet transformation yield energy distribution among components adopted detect nonlinearity. Then, damage feature extraction is conducted...

Abstract An analytical study of the seismic response typical base isolated structures mounted on rubber bearings is presented. Isolated buildings are liable to have closely spaced lower modes vibration with small eccentricity between centres mass and rigidity. The structure modelled as a rigid deck lumped masses supported axially inextensible elastomeric bearings. This simplified system has three degrees freedom (dof), two translations one rotation in horizontal plane. Green's functions for...

SUMMARY Singapore is a classic case of modern metropolis with low hazard but high exposure to the seismicity in Sumatra. Because land shortage, more than 80% population lives high‐rise residential buildings. As part efforts assess seismic performance buildings subjected long‐distance Sumatran earthquakes, relationships between natural vibration period and height public are derived empirically by conducting ambient tests on 116 The measured have ranging from 4 30 stories. aspect ratio plan...

Using the concept of lumped masses and rigid floor slabs, several mathematical models were built using a popular PC-based finite element program to model tall building with frame-core wall structural system. These analysed obtain first nine mode shapes their natural frequencies which compared those from field measurements, numerical correlation indicators. The comparison shows factors that can have significant effect on analysis results. Firstly, outriggers connecting outer framed tube...

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Abstract A representative attenuation relationship is one of the key components required in seismic hazard assessment a region interest. Attenuation relationships for peak ground acceleration, velocity and response spectral accelerations Sumatran megathrust earthquakes, covering M w up to 9.0, are derived based on synthetic seismograms obtained from finite‐fault kinematic model. The very hard rock site condition long‐distance range between 200 1500 km. They then validated with recorded data...

The Pearl River Delta metropolitan region is one of the most densely urbanized megapolises worldwide with high exposure to weather-related disasters such as storms, storm surges and river floods. Shenzhen megacity has been fastest growing city in a significant increase resident population from 0.32 million 1980 13.03 2018. Being flood-prone city, Shenzhen’s rapid urbanization further exacerbated potential flood losses forthcoming risk. Thus, evaluating changes its present future essential...

The experimental and analytical investigations carried out on lightly reinforced concrete beam-column joints subjected to seismic loading are presented in this paper. Five 3/4-scale were tested investigate the behavior of joints. variables specimens include column orientations presence slabs top beams. quasi-static load reversals simulate earthquake loadings. Experimental results obtained joint shear stresses, strains, observed cracking initial stiffness. test provided some information about...

Six full-scale nonseismically detailed reinforced concrete interior beam-wide column joints were tested to investigate the seismic behavior of joints. Axial compression loads varying from zero high magnitude, as well quasi-static cyclic loading simulating earthquake actions applied. The overall performance each test assembly was examined in terms lateral load capacity, drift, stiffness, energy dissipation and joint shear strength. Three levels axial compressive investigated determine how...

Potential critical risks of cascading failures in power systems can be identified by exposing those electrical components on which certain initial disturbances may cause maximum disruption to the systems. The authors investigated described direct current flow equations, where initiating (natural or anthropic factors) give rise changes admittances one multiple transmission lines. is quantified with remaining at end process. In particular, identifying branches and corresponding causing...

Abstract This paper proposes an aseismic design concept in which the superstructure of a base‐isolated building is divided into several segments. Each segment may comprise few storeys and interconnected by additional vibrational isolation systems. The dynamic characteristics segmental buildings are investigated. optimum parameters vibration systems determined minimizing mean square acceleration response. seismic response typical subjected to N—S component 1940 El Centro earthquake input...

In this paper, the dynamic vehicle element (DVE) method is developed to solve transient response of a vehicle–structure interaction system in time domain. The DVE treats as moving part entire system, which considers influence at level by incorporating detailed between multiple vehicles and structure induced irregular road profiles. addition, simplified decoupled nodal loading (DNL) proposed. DNL generates series concentrated represents reaction force on structure. therefore, accounts for...

In 1993, Shimizu Corporation provided the opportunity to record manually, readings of stress and strain gauges they had embedded at 18th story a 65-story office tower under construction in Singapore. Static continued during long after, capitalizing on access building assistance both contractor owner, monitoring systems for tracking wind, acceleration, deflection were installed progressively upgraded. Further, comprehensive ambient vibration survey finite element model updating exercise...

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Abstract As part of the effort to assess seismic hazards Singapore and Malay Peninsula, representative ground motion prediction models have be established. Seven existing attenuation relationships developed for shallow crustal earthquakes in stable continent active tectonic regions are examined, they found consistently over‐predict motions Sumatran‐fault recently recorded Singapore. This may attributed differences regional structures distance ranges considered. Since number region is very...

Brief Report| August 01, 1996 Historical earthquakes felt in Singapore Tso-Chien Pan; Pan School of Civil and Structural Engineering Nanyang Technological UniversityNanyang Ave., 639798Republic Search for other works by this author on: GSW Google Scholar Jichun Sun Bulletin the Seismological Society America (1996) 86 (4): 1173–1178. https://doi.org/10.1785/BSSA0860041173 Article history received: 10 Aug 1995 first online: 03 Mar 2017 Cite View This Citation Add to Manager Share Icon Facebook...

Several lines of evidence have indicated that the Mentawai segment Sumatran megathrust is very likely to rupture within next few decades. The present study investigate seismic hazard and risk levels at major cities in Sumatra, Java, Singapore, Malay Peninsula caused by potential giant earthquakes. Three scenarios are considered. first one an Mw 8.6 earthquake rupturing 280 km has been locked since 1797; second scenario, oc- curs along a 600 covering combined areas 1797 1833 historical...