Abstract
It is meaningful to further explore the hardware and software functions of MTS loading system widely used in building structure test at home and abroad. This paper proposes a kind of seismic pseudo-dynamic test method based on internal command control of software. Three programs including monitor station, sincycle test and rampcontrol test were developed by VB, and the connection with NetSLab platform was completed via master-slaver network, then the test system was established. A single degree of freedom hybrid test of single span bridge was carried out, and a short column of CFRP reinforced was used to be an experimental element. Secondary load for the partial damaged model was implemented to research the mechanics performance of the specimen. The result confirms that the established system is capable of conducting the pseudo-dynamic hybrid test. The hybrid test demonstrates that the proposed internal command control method is feasible and effective, which can provide reference for the system development and seismic research.
Highlights
The structure engineering laboratories at home and abroad have been equipped with MTS electro hydraulic servo loading system which can carry out basic static load test, fatigue test and quasi- static test of civil engineering, but only quasi-static test involves seismic performance of structure, and because of the difficulty in directly input the actual ground motion record, so it cannot reflect the real condition
A relevant software development was carried out based on MTS electro hydraulic servo loading system widely used in building structure test
The pseudo dynamic test system developed in this paper can run smoothly, and has a certain accuracy and stability
Summary
The structure engineering laboratories at home and abroad have been equipped with MTS electro hydraulic servo loading system which can carry out basic static load test, fatigue test and quasi- static test of civil engineering, but only quasi-static test involves seismic performance of structure, and because of the difficulty in directly input the actual ground motion record, so it cannot reflect the real condition. This software utilized Hilber, Hughes and Taylor’s α method with adaptive variable step size, and could carry out one-dimensional plane pseudo dynamic test. Qiu F W at Tsinghua University developed pseudo dynamic test software named TUT based on MTS VC++ library which could conduct a one-dimensional or twodimensional pseudo dynamic test, and substructure with torsion effect was taken into account [9]. It has been applied in a few domestic laboratories
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