METHOD FOR RESTORING FORCE CHARACTERISTIC OF RC FRAME CONSISTED WITH SHEAR WALLS AND SLAB

2020 ◽  
Vol 85 (778) ◽  
pp. 1643-1653
Author(s):  
Kazuaki TSUDA ◽  
Eiichi INAI ◽  
Tomoya MATSUI
Keyword(s):  
Shear Walls ◽  
Force Characteristic ◽  
Rc Frame ◽  
Restoring Force

Research and Development of Earthquake Isolation System Using Vertically Utilized Coiled Spring

2006 ◽  
Author(s):  
Tsuyoshi Fukasawa ◽  
Satoshi Fujita
Keyword(s):  
Research And Development ◽  
Seismic Isolation ◽  
Scale Model ◽  
Force Characteristic ◽  
Light Weight ◽  
Restoring Force ◽  
Isolation System ◽  
Coiled Spring ◽  
Isolation Performance ◽  
Weight Structures

This paper describes the research and development of new type of the isolation systems suitable for various structures. Basic concept of the new isolation system is to realize cost effective design without any reduction in the isolation performance. This paper presents results obtained from experimental and analytical studies to evaluate isolation performances of newly developed the isolation system. In the experiment, static tests were first carried out using a 0.20 scale model (55 kg mass, and 0.50 m × 0.50 m × 0.27 m size) for isolated-light-weight-structures model which was supported by two linear ball bearings and, restoring force was provided to superstructure by transversal stiffness of a coiled spring, so as to examine restoring force characteristic of the coiled spring. Second, dynamic tests were implemented in order to investigate the isolation performance of the isolation system against several actual seismic inputs. In analysis, seismic response analyses for the scale model, regarding the vibration tests using the actual seismic wave, were carried out to evaluate the response analytical method for the isolation system using the coiled spring. From these results, the followings are clarified. (1) Analytical results for the isolated light-weight-structures model agree well with experiment results. (2) The newly developed seismic isolation system using the coiled spring reduced response accelerations of the light-weight-structures sufficiently.

A STUDY ON THE EARTHQUAKE RESPONSE CHARACTERISTIC OF HYSTERESIS DAMPER USING SLY120 AND SS400

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2809-2814
Author(s):  
JAE HYOUK CHOI ◽  
RYOUICHI TAKISHITA
Keyword(s):  
Numerical Analysis ◽  
Vibration Suppression ◽  
Response Characteristic ◽  
Test System ◽  
Earthquake Response ◽  
Force Characteristic ◽  
Analysis Model ◽  
Loading Test ◽  
Restoring Force ◽  
Response Test

To examine earthquake response characteristics of hysteresis damper using SLY120 and SS400 steel panel damper, earthquake response test were performed. In this paper, restoring force characteristic of hysteresis damper which is obtained by loading test are assessed using numerical analysis model. A skeleton shift model, which has been used frequently in conventional analysis, is applied. Using a hybrid earthquake response test system, various characteristics of structural components that are difficult to model and to express mathematically are detected by test and incorporated into the computer system to promote numerical analysis of the whole system. In this research, hybrid earthquake response simulation of the linked vibration suppression structure is carried out, whereas hysteresis damper at the linked vibration control structure are selected as the actual loading test part and the peripheral frame is considered to be the virtual structure part.

Automatic Detection of Damage Level of Structures under the Severe Earthquake Using Sensor Network

2012 ◽  
Vol 166-169 ◽  
pp. 2216-2220 ◽  
Author(s):  
Hirotaka Ikeda ◽  
Takahiro Kawaguchi ◽  
Kenji Oguni
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Automatic Detection ◽  
Wireless Sensor ◽  
Dissipated Energy ◽  
Force Characteristic ◽  
Restoring Force ◽  
Damage Level ◽  
Acceleration Data ◽  
Force Characteristics

We propose a method to compute the restoring force characteristics and dissipated energy to detect damage level of viaducts for railways and highways, using only acceleration. The acceleration data were measured by accelerometers which were installed on the top and the bottom of the structures. Wireless sensor network is used to compute and collect the data. Using this system, the information of restoring force characteristic and dissipated energy can be created.

scholarly journals DAMAGE AND RESTORING FORCE CHARACTERISTIC OF HIGH-STRENGTH REINFORCED CONCRETE BEAMS

2018 ◽  
Vol 83 (751) ◽  
pp. 1295-1305
Author(s):  
Yusuke MAIDA ◽  
Satoshi HAMADA ◽  
Hiroyuki TAKENAKA ◽  
Qiong BAI ◽  
Nobuyuki IZUMI
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
High Strength ◽  
Reinforced Concrete Beams ◽  
Force Characteristic ◽  
Restoring Force

scholarly journals Seismic Behavior of Nonductile RC Frame Slotted with Corrugated Steel Plate Shear Walls

2021 ◽  
Vol 2021 ◽  
pp. 1-23
Author(s):  
Ningning Feng ◽  
Changsheng Wu
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Seismic Behavior ◽  
Steel Plate ◽  
Concrete Strength ◽  
Shear Walls ◽  
Slit Width ◽  
Rc Frame ◽  
Steel Plate Shear Walls ◽  
Rc Frames

Two specimens of nonductile reinforced concrete (RC) frame (ND-1) and nonductile RC frame retrofitted by corrugated steel plate shear walls slotted with columns (ND-2) are established by finite element. These specimens have same dimensions and steel skeletons. Finite element models had been verified by the existing experimental results. The hysteresis curves, skeleton curves, ductility, and stiffness curves of Specimen ND-1 and Specimen ND-2 are compared. The results show that the reinforcement effect is significant. Twenty-four models are built to study the seismic behavior on different influence parameters. The parameters are slit width, thickness of corrugated steel plate shear walls, concrete strength of nonductile RC frame, and boundary conditions of corrugated steel plate shear walls at slotted parts. The results indicate that the strength is declined with the increase of slit width. With the increase of thickness and concrete strength, the strength and stiffness are enhanced. The strength is larger with the boundary than without. Slit width and thickness have an important impact on the stiffness. Concrete strength and boundary conditions have little impact on stiffness. The strengthened nonductile RC frames have enough ductility.

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