Preparation and Verification of a Limit Protective Isolation Structural Analysis Programs

2013 ◽  
Vol 748 ◽  
pp. 1083-1086
Author(s):  
Jin Hui Liu ◽  
Tian Yuan Wang ◽  
Zhi Hao Zhao ◽  
Yu Bo Wei
Keyword(s):  
Structural Dynamics ◽  
Base Isolation ◽  
Calculation Model ◽  
Seismic Structure ◽  
Major Research ◽  
Dynamic Schedule ◽  
Limit Protection ◽  
Model Preparation ◽  
Great Harm ◽  
Structure Research

The big earthquake is a sudden, devastating natural disasters, and cause great harm to social.Earthquake damage to the structure of the building is the main reason to cause personal injury.Therefore, seismic research is particularly important.With further research,seismic studies from traditional seismic structure gradually developed into the base isolation,and the basis of isolation to become a major research focus.Although many studies of base isolation structure,But for foundation isolation in limit structure research is not enough, and not paid enough attention to practical engineering.Therefore, based on the theory of structural dynamics, create a calculation model, preparation of the limit protective isolation structure analysis procedures, and validation analysis Limit Protection Isolation structure can better analyze dynamic schedule.

Diffraction, crystallography and microscopy beyond three dimensions: structural dynamics in space and time

2004 ◽  
Vol 363 (1827) ◽  
pp. 315-329 ◽  
Author(s):  
Ahmed H. Zewail
Keyword(s):  
Electron Microscopy ◽  
Electron Diffraction ◽  
Gas Phase ◽  
Structural Dynamics ◽  
Research Area ◽  
Three Dimensions ◽  
Ultrafast Electron Diffraction ◽  
Major Research ◽  
Condensed Media ◽  
Recent Developments

In this article we highlight recent developments of ultrafast electron diffraction and crystallography at Caltech. These developments have made it possible to resolve transient structures, both spatially (0.01 Å) and temporally (picosecond and now femtosecond), in the gas phase and condensed media—surfaces, interfaces, and crystals—with wide-ranging applications. With the extension to ultrafast electron microscopy, discussed here and elsewhere, we present an overview of one major research area at our centre, the Laboratory for Molecular Sciences.

Brief Introduction of Traditional Seismic Technology and Emerging Isolation Technology

2014 ◽  
Vol 1010-1012 ◽  
pp. 250-253
Author(s):  
Ji Yang Li ◽  
Wen Fang Zhang
Keyword(s):  
Control System ◽  
Seismic Response ◽  
Seismic Isolation ◽  
Passive Control ◽  
Base Isolation ◽  
Seismic Structure ◽  
Natural Period ◽  
Isolation Layer ◽  
Passive Seismic

Seismic can be divided into passive seismic and active seismic. Seismic isolation technology belong to the second type. Base isolation structure is defined by setting the isolation layer between the superstructure and foundation building, to extend the natural period architecture, increasing the damping to reduce structural seismic response. It is a passive control system. Compared with the traditional seismic structure, it mainly through the isolation layer to absorb and dissipate energy, reducing the response to the earthquake.

scholarly journals Economic performance analysis of seismic isolation, energy dissipation, and traditional seismic structures

2021 ◽  
Vol 248 ◽  
pp. 01032
Author(s):  
Shu-jiang Jiang ◽  
Shun-zhong Yao ◽  
De-wen Liu
Keyword(s):  
Energy Dissipation ◽  
Seismic Isolation ◽  
Base Isolation ◽  
Seismic Resistance ◽  
Seismic Structure ◽  
Dissipation Structure ◽  
The Government ◽  
New Countryside ◽  
Building Standards ◽  
Seismic Damping

The construction of a new countryside requires a compr hensive improvement in the building standards of villages and towns, and the seismic resistance of buildings in earthquake-prone areas has attracted much attention. Due to the backward economic development of villages and towns, the development of seismic isolation structure and energy dissipation structure is hindered. To build houses with better seismic performance, the economic efficiency of seismic isolation and energy dissipation structures has become a matter of close concern to the local people and the government. This article compares the economic differences between the original seismic structure, the base isolation structure, and the seismic damping structure from the costs incurred during the entire life cycle of the building, and provides economic reference for the new rural seismic isolation building.

scholarly journals Field Test for a Base Isolation Structure on Condition of Horizontal and Initial Displacement

2021 ◽  
Vol 12 (1) ◽  
pp. 232
Author(s):  
Ying-Xiong Wu ◽  
Xin-Jun Dong ◽  
You-Qin Lin ◽  
Hao-De Cheng
Keyword(s):  
Dynamic Response ◽  
Dynamic Characteristics ◽  
Natural Vibration ◽  
Base Isolation ◽  
Seismic Structure ◽  
Control Effect ◽  
Initial Displacement ◽  
Pump System ◽  
Vibration Period ◽  
Isolation Layer

There are a few isolated structures that have been subjected to seismic testing. An isolated structure is incapable of tracking, adjusting, and controlling its dynamic characteristics. As a result, field evaluations of solitary structures’ dynamic characteristics are important. The horizontal initial displacement of a base isolation kindergarten made of 46 isolation bearings is 75 mm. The method for creating the horizontal initial displacement condition is illustrated, as are the primary test findings. Horizontal initial displacement is accomplished with the assistance of a reaction wall, rods, and hydraulic pump system. To begin, we removed the building using hydraulic jacks to produce horizontal displacement of the isolation layer and then attached rods to support the building. The rods were then shot and unloaded, causing the building to shake freely, and its dynamic response and other parameters were tested. The results indicate that the natural vibration period of an isolated structure is much greater than the natural vibration period of a seismic structure. The isolation layer’s hysteretic curve as completely filled; upon unloading, the isolation layer as promptly reset; the dynamic response control effect of each was visible, but the top floor’s acceleration was magnified by approximately 1.27 times.

Seismic Performance of Base-Isolation Building Subjected to Near-Fault Ground Motion with Velocity Pulse

2014 ◽  
Vol 580-583 ◽  
pp. 1700-1703
Author(s):  
Qiu Mei He ◽  
Ya Qi Li ◽  
Ya Min Zhao ◽  
Yu Yang
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Base Isolation ◽  
Ground Motions ◽  
Time History ◽  
Nonlinear Time History Analysis ◽  
Seismic Structure ◽  
Velocity Pulse ◽  
Near Fault ◽  
Rubber Bearings

The seismic response of the base-isolated structure can be reduced significantly in the far-field region compared to the conventional seismic structure. However, near-fault ground motions with velocity pulse may cause the adverse influence on the seismic performance of the base-isolation building, which needs to be investigated deeply. In this paper 6 ground motions with velocity pulse are selected as the input, and the seismic response of a 9 layers conventional seismic RC frame building and comparative base-isolation building with lead-core rubber bearings are obtained by nonlinear time history analysis. The result indicates that base-isolation building with lead-core rubber bearings are of good aseismic performance under the near-fault ground motions with velocity pulse.

Structural dynamics of P-type ATPase ion pumps

2019 ◽  
Vol 47 (5) ◽  
pp. 1247-1257 ◽  
Author(s):  
Mateusz Dyla ◽  
Sara Basse Hansen ◽  
Poul Nissen ◽  
Magnus Kjaergaard
Keyword(s):  
Structural Dynamics ◽  
Single Molecule ◽  
New Technologies ◽  
Atp Hydrolysis ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Time Resolved ◽  
Dynamics Simulations ◽  
Types Of Information ◽  
P Type

Abstract P-type ATPases transport ions across biological membranes against concentration gradients and are essential for all cells. They use the energy from ATP hydrolysis to propel large intramolecular movements, which drive vectorial transport of ions. Tight coordination of the motions of the pump is required to couple the two spatially distant processes of ion binding and ATP hydrolysis. Here, we review our current understanding of the structural dynamics of P-type ATPases, focusing primarily on Ca2+ pumps. We integrate different types of information that report on structural dynamics, primarily time-resolved fluorescence experiments including single-molecule Förster resonance energy transfer and molecular dynamics simulations, and interpret them in the framework provided by the numerous crystal structures of sarco/endoplasmic reticulum Ca2+-ATPase. We discuss the challenges in characterizing the dynamics of membrane pumps, and the likely impact of new technologies on the field.

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