Collapse simulation of a four‐story steel moment frame by a distributed online hybrid test

Wang, Tao; McCormick, Jason; Yoshitake, Nobuya; Pan, Peng; Murata, Yoshitaka; Nakashima, Masayoshi

doi:10.1002/eqe.798

Cited by 33 publications

(28 citation statements)

References 11 publications

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“…Improvements in data exchange using a socket mechanism as compared to standard internet protocols were also developed. Wang et al, [143] & [144] investigated some of the numerical characteristics of the test method developed by Pan et al, [142] in order to improve the stability and accuracy of the iteration scheme used by Pan et al, [142].…”

Section: Host/station Frameworkmentioning

confidence: 99%

An overview of seismic hybrid testing of engineering structures

McCrum¹,

Williams

2016

Engineering Structures

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An overview of research on the development of the hybrid test method is presented. The maturity of the hybrid test method is mapped in order to provide context to individual research in the overall development of the test method. In the pseudo dynamic (PsD) test method, the equations of motion are solved using a time stepping numerical integration technique with the inertia and damping being numerically modelled whilst restoring force is physically measured over an extended timescale. Developments in continuous PsD testing led to the real-time hybrid test method and geographically distributed hybrid tests. A key aspect to the efficiency of hybrid testing is the substructuring technique where the critical structural subassemblies that are fundamental to the overall response of the structure are physically tested whilst the remainder of the structure whose response can be more easily predicted is numerically modelled. Much of the early research focused on developing the accuracy and efficiency of the test method, whereas more recently the method has matured to a level where the test method is applied purely as a dynamic testing technique.Developments in numerical integration methods, substructuring, experimental error reduction, delay compensation and speed of testing have led to a test method now in use as full-scale real-time dynamic testing method that is reliable, accurate, efficient and cost effective.

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Section: Host/station Frameworkmentioning

confidence: 99%

An overview of seismic hybrid testing of engineering structures

McCrum¹,

Williams

2016

Engineering Structures

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“…Apparently, a full-scale test of a high-rise building as a whole is impracticable. One alternative is the application of the online hybrid test, which is capable of handling a large-scale structure by the introduction of substructuring techniques [4][5][6][7][8]. The test, however, adopts quasi-static loading, which is not feasible in the simulation of sliding and overturning behavior of furniture.…”

Section: Introductionmentioning

confidence: 98%

A substructure shaking table test for reproduction of earthquake responses of high‐rise buildings

Kajiwara

Nagae

et al. 2009

Earthq Engng Struct Dyn

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SUMMARYWhen subjected to long-period ground motions, high-rise buildings' upper floors undergo large responses. Furniture and nonstructural components are susceptible to significant damage in such events. This paper proposes a full-scale substructure shaking table test to reproduce large floor responses of high-rise buildings. The response at the top floor of a virtual 30-story building model subjected to a synthesized long-period ground motion is taken as a target wave for reproduction. Since a shaking table has difficulties in directly reproducing such large responses due to various capacity limitations, a rubber-and-mass system is proposed to amplify the table motion. To achieve an accurate reproduction of the floor responses, a control algorithm called the open-loop inverse dynamics compensation via simulation (IDCS) algorithm is used to generate a special input wave for the shaking table. To implement the IDCS algorithm, the model matching method and the H ∞ method are adopted to construct the controller. A numerical example is presented to illustrate the open-loop IDCS algorithm and compare the performance of different methods of controller design. A series of full-scale substructure shaking table tests are conducted in E-Defense to verify the effectiveness of the proposed method and examine the seismic behavior of furniture. The test results demonstrate that the rubber-and-mass system is capable of amplifying the table motion by a factor of about 3.5 for the maximum velocity and displacement, and the substructure shaking table test can reproduce the large floor responses for a few minutes.

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“…As a result of damage sustained during past earthquakes, performance-based design philosophies, and strong column-weak beam requirements, much of the previous research on the behavior of steel structures has focused on the beam hinging mechanism in steel moment frames and more recently brace yielding in special concentrically braced frames. Only a limited amount of work has focused on column base behavior and current design methods for column base systems [1][2][3][4]. This has led to exposed base plate-type column bases (or standard base-plate connections) often being designed as fixed connections with the base plate being connected to the foundation through anchor bolts in order to resist shear forces and moments during a seismic event.…”

Section: Introductionmentioning

confidence: 99%

“…This has led to exposed base plate-type column bases (or standard base-plate connections) often being designed as fixed connections with the base plate being connected to the foundation through anchor bolts in order to resist shear forces and moments during a seismic event. These bolted column base systems are often employed because of ease of construction and economic efficiency [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the sliding behavior between steel and mortar for seismic applications in structures

McCormick

Nagae

Ikenaga

et al. 2009

Earthq Engng Struct Dyn

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SUMMARYThe friction developed between a steel base plate and a mortar base contributes shear resistance to the building system during a seismic event. In order to investigate the possible sliding behavior between the base plate and the mortar, a shake table study is undertaken using a large rigid mass supported by steel contact elements which rest on mortar surfaces connected to the shake table. Horizontal input accelerations are considered at various magnitudes and frequencies. The results provide a constant friction coefficient during sliding with an average value of approximately 0.78. A theoretical formulation of the friction behavior is also undertaken. The theoretical equations show that the sliding behavior is dependent on the ratio of the friction force to the input force. The addition of vertical accelerations to the system further complicates the sliding behavior as a result of the varying normal force. This results in a variable friction resistance which is a function of the amplitude, phase, and frequency of the horizontal and vertical input motions. In general, this study showed a consistent and reliable sliding behavior between steel and mortar.

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Collapse simulation of a four‐story steel moment frame by a distributed online hybrid test

Cited by 33 publications

References 11 publications

An overview of seismic hybrid testing of engineering structures

An overview of seismic hybrid testing of engineering structures

A substructure shaking table test for reproduction of earthquake responses of high‐rise buildings

Investigation of the sliding behavior between steel and mortar for seismic applications in structures

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