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YUAN-TAO WENG1, YUAN-SEN YANG2, MIN-LANG LIN3, YA-YING CHANG4, KEH-CHYUAN TSAI5
1 National Center for Research on Earthquake Engineering, Taipei, Taiwan Abstract Pseudo-dynamic tests on a reduce-scale model of a four-pier bridge are performed at the National Center for Research on Earthquake Engineering (NCREE) and National Taiwan University (NTU) in Taiwan and Carleton University (CU) in Canada using the sub-structuring technique in February of 2006. Three physical pier specimens are constructed and tested in these three laboratories, while the deck, the abutments and the remaining one pier are numerically modeled on-line. The seismic ground accelerations considered in this study were recorded in the 1999 Chi-Chi earthquake or generated for the east Canada site condition. The ground accelerations are scaled up to represent return period of 50%, 10%, and 2% in 50 years and bi-directionally applied in the transverse and longitudinal directions simultaneously, aimed at the assessment of the seismic vulnerability of a typical high-speed railway bridge system designed prior to the modern Taiwan bridge seismic code. The seismic performance of the prototype bridge structure is predicted by nonlinear structural analysis programs PISA3D and OpenSEES, respectively. Comparisons of analytical results obtained by bi-directional non-linear response history analysis (NLRHA) and cyclic pushover analysis are presented. Analytical results suggest that the reduce-scaled peak column base shear predicted by the NLRHA in X direction are about 272 kN, 800 kN and 364 kN (144 kN , 891 kN and 220 kN for Y direction) in the P1, P2, and P3 specimens for the all process of PDTs., respectively. The peak column drifts predicted by NLRHA are about 1.36% (X direction, at P1 specimen) and 1.09% radians (Y direction, at P2 specimen), respectively. Download full article in PDF format... |
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Y. S. Yang1 , S. J. Wang2, K. J. Wang3, M. L. Lin1, Y. T. Weng1, W. C. Cheng3, Y. Y. Chang4, 1 Associate Research Fellow, National Center for Research on Earthquake Engineering, Taipei 106, Taiwan Abstract This paper introduces the latest updates of a platform named ISEE (Internet-based Simulation for Earthquake Engineering) and its application on a Taiwan-Canada transnational collaborative pseudo-dynamic experiment of a multiple-span bridge system. Three reduce-scale Double-Skinned Concrete-Filled Tube (DSCFT) pier specimens are located at laboratories at the National Center for Research on Earthquake Engineering (NCREE), National Taiwan University (NTU), and Carleton University (CU), respectively. A Command Generation Module (CGM), based on an extended OpenSees platform is employed for simulation of different ground motion events in the experiment. Laboratory dependent Facility Controlling Modules (FCMs) are developed and installed at all laboratories, transferring controlling commands generated by a CGM to the hydraulic actuator controllers. The ISEE Data Center gathers and shares experimental data with CGM and FCMs. Video Modules transfer real-time video streams from laboratories to Internet. Remotely controlled Camera Modules take high resolution specimen photos, automatically after FCMs complete displacement controlling commands of each time step. Visualization Modules generates 2D plots of experimental data and comparisons of experimental and numerical analysis data, and presents these generated figures on the web page in real-time. The above ISEE components communicate through Internet. Researchers and guests may witness or observe the experiment progress through widely used Web browsers, such as Internet Explorer 6, Netscape 6 or FireFox, without need to install additional programs for viewers’ convenience. The numerical model in the CGM and the preliminary numerical simulation of the bridge responses are also introduced in this paper. The networked experiment is scheduled in November and December, 2005. |
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YA-YING CHANG1, YUAN-SEN YANG2, SHIANG-JUNG WANG2, MIN-LANG LIN1, YUAN-TAO WENG2 1 Department of Civil and Environmental Engineering, Carleton University, Ottawa, Canada Abstract This paper presents a collaborative research project aimed at developing a robust standardized procedure for hybrid testing through Internet. Modules for control and instrumentation are developed based on the use of standardized software interfaces. A pseudo-dynamic test of a four-pier bridge system is planned using the developed protocols. The design of the hybrid test set-up and procedures, and the test specimens are described in the paper. Numerical results from computer simulation of the test are also presented. The hybrid experiment of testing sub-components of the prototype bridge system will be carried out at three remote sites over long distance. Two of the remotes sites will be in Taiwan while the third remote site will be in Canada, making the test the first cross-continent collaborative networked hybrid test of large scale specimens. This is a collaborative research project between the National Center for Research on Earthquake Engineering (NCREE) in Taiwan, the National Taiwan University (NTU), and Carleton University in Canada. |
© 2006 National Center for Research on Earthquake Engineering