scholarly journals Evaluasi Kesehatan Struktur Bangunan berdasarkan Respon Dinamik Berbasiskan Data Akselerometer

2017 ◽  
Vol 23 (2) ◽  
pp. 142
Author(s):  
Wan Fikri Darmawan ◽  
Reni Suryanita ◽  
Zulfikar Djauhari
Keyword(s):  
Pushover Analysis ◽  
Damage Index ◽  
Time History ◽  
Frame Structure ◽  
Accelerometer Data ◽  
Building Structures ◽  
Element Analysis ◽  
Earthquake Load ◽  
Damage Condition ◽  
A Minor

The aim of the research is to analysis the health of a simple frame structure based on accelerometer data. The research is a preliminary study which used the accelerometer data in the time history analysis of the structure. The parameters has been used in the study are the Story Damage Index (SDI), the ApproximateStory Damage Index (ASDI), the Flexibility Damage Index (MFDI), and the Park Ang Damage Index. The finite element analysis is used to identify the damage of building structures through the pushover analysis. The study has conducted the minor damage index, physical appearance to check the cracked beam andconcrete column. The damage index average is in the range 0-0.08. It can be concluded the building is still able to withstand the earthquake load. However, the building is stated in a minor damage condition after the earthquake occurred.

Irregular Structure of the Metal Energy Dissipation Wrest Resistant Performance Analysis

2011 ◽  
Vol 105-107 ◽  
pp. 818-822
Author(s):  
Xiao Fei Teng ◽  
Si Yang Chen ◽  
Bin Luo
Keyword(s):  
Time History ◽  
Frame Structure ◽  
Software Modeling ◽  
Element Analysis ◽  
Irregular Structure ◽  
History Analysis ◽  
Framework Model ◽  
Before And After ◽  
Integral Structure ◽  
Dynamic Time

To make a top local adding stories of “L” flat facade irregular frame structure with good resistance to twist and integrity, can better satisfy the requirements of local seismic fortification intensity,using metal damper to this after-adding-stories framework model for processing. Using SAP2000 finite element analysis software modeling and in its install metal damper dynamic time-history analysis before and after. Results show that the structure using metal consumption technology in consume earthquake input energy at the same time can enhance structure rigid and floor wrest resistant and strengthen the lateral stiffness integral structure seismic performance.

scholarly journals Effectiveness of fluid viscous damper for steel frame building subjected to earthquake load

2021 ◽  
Vol 263 ◽  
pp. 03015
Author(s):  
Thanh Binh Pham ◽  
Ngoc Quang Vu
Keyword(s):  
Dynamic Response ◽  
Time History ◽  
Steel Frame ◽  
Frame Structure ◽  
Seismic Load ◽  
Viscous Damper ◽  
Maximum Displacement ◽  
Fluid Viscous Damper ◽  
Frame Building ◽  
Earthquake Load

Since the appearance of the first modern multistories buildings, besides the demand of ensuring the bearing capacity, one of the urgent problems facing the engineer is to do how to design structure to ensure the requirements of normal use such as displacement, motion acceleration within permissible limits. There exist many methods to reduce these response of structure under lateral load. Among these, using fluid viscous damper (FVD) is one of the most applied equipment because of its simplicity. This paper presents the examination of eight-story steel frame structure subjected to seismic load. The FVD system is defined in Etabs with link properties. In each story, four dampers are located in each direction of plan, with two on each side of the center of stiffness of the story. The time history analysis was conducted to study the structure subjected to seimic load collected from the function library of program Etabs. The effect of FVD system was determined by the dynamic response of the building and displacement indexes such as maximum displacement of roof, story drift ratio. The results show that, all the dynamic response characters of structure were decreased significantly when providing the FVD to it.

scholarly journals Development of Seismic Fragility Functions for a Moment Resisting Reinforced Concrete Framed Structure

2016 ◽  
Vol 10 (1) ◽  
pp. 42-51 ◽  
Author(s):  
D. P. McCrum ◽  
G. Amato ◽  
R. Suhail
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Model ◽  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Pushover Analysis ◽  
Frame Structure ◽  
Building Structures ◽  
Reinforced Concrete Structure ◽  
Moment Resisting ◽  
Damage States

Understanding the seismic vulnerability of building structures is important for seismic engineers, building owners, risk insurers and governments. Seismic vulnerability defines a buildings predisposition to be damaged as a result of an earthquake of a given severity. There are two components to seismic risk; the seismic hazard and the exposure of the structural inventory to any given earthquake event. This paper demonstrates the development of fragility curves at different damage states using a detailed mechanical model of a moment resisting reinforced concrete structure typical of Southern Europe. The mechanical model consists of a complex three-dimensional finite element model of the reinforced concrete moment resisting frame structure and is used to define the damage states through pushover analysis. Fragility curves are also defined using the HAZUS macro-seismic methodology and the Risk-UE macro-seismic methodology. Comparison of the mechanically modelled and HAZUS fragility curve shows good agreement while the Risk-UE methodology shows reasonably poor agreement.

scholarly journals Dynamic Performance Analysis of Steel Frame Structure under Seismic Action

2019 ◽  
Vol 2 (2) ◽  
pp. 1
Author(s):  
Xiaojun Yuan ◽  
Yanmu Qu ◽  
Jinlong Liu ◽  
Kailin Wei ◽  
Haifeng Zong
Keyword(s):  
Dynamic Performance ◽  
Time History ◽  
Steel Frame ◽  
Frame Structure ◽  
Seismic Action ◽  
Element Analysis ◽  
History Analysis ◽  
Dynamic Time ◽  
Steel Frame Structure ◽  
Dynamic Performance Analysis

In order to find out the dynamic characteristics of a steel frame structure project in the 8 degree (0.3g) area, the artificial wave, Taft wave and El Centro wave were input by using the finite element analysis software ANSYS. The dynamic time-history analysis of the structure shows the dynamic performance of the structure under the frequent earthquakes and rare earthquakes.

Comparison of Stiffness Degradation of Special-Shaped Column and Rectangular Column Structure in Earthquake

2013 ◽  
Vol 838-841 ◽  
pp. 1492-1496
Author(s):  
Yi Ying Li ◽  
Wen Pan ◽  
Xiao Feng Zou
Keyword(s):  
Finite Element ◽  
Energy Dissipation ◽  
Base Isolation ◽  
Time History ◽  
Frame Structure ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Software ◽  
Column Structure ◽  
Rare Earthquake

In this paper, using the finite element software PERFORM3D to establish the finite element analysis model for isolation and seismic frame structure with special-shaped column and rectangular column frame structure, and the overall structure of the moderate and strong elastic and nonlinear earthquake time-history analysis to get the dynamic characteristics, from two aspects of the damping coefficient in horizontal direction and the energy dissipation, investigation structure in earthquake and rare earthquake of superstructure stiffness attenuation. It can be drawn only seismic resistance measures are taken, the special-shaped column structure under rare earthquake stiffness attenuation speed is greater than the rectangular column, if after using base isolation technology, although the special-shaped column stiffness attenuation rate is still greater than the rectangular column, but the two energy dissipation ability.

scholarly journals PENGARUH PASANGAN DINDING BATA PADA RESPON DINAMIK STRUKTUR GEDUNG AKIBAT BEBAN GEMPA

2016 ◽  
Vol 18 (1) ◽  
pp. 9-14
Author(s):  
Himawan Indarto ◽  
Bambang Pardoyo ◽  
Nur Fahria R ◽  
Ita Puji L
Keyword(s):  
Structural Analysis ◽  
Structural Model ◽  
Time History ◽  
Frame Structure ◽  
Wall Structure ◽  
Brick Wall ◽  
Base Shear ◽  
Significant Difference ◽  
Earthquake Load ◽  
Equivalent Method

For analysis purpose, the model system of structure is created as open frame structure rather than massive structure. However, the brick wall will affect to the behavior of the dynamic response when the earthquake induces the structure. The results of structural analysis by time history method using El-Centro earthquake, it reveales a significant difference of base shear between two types of structural model: (i) brick wall structure and (ii) non-brick wall structure. The base shear exists on the brick wall structure 20 percent greater than non-brick wall structure. Therefore, a structure without brick wall will be more irressistant due to the earthquake. The structural analysis using static equivalent method as point out in Standard of Earthquake Resistant for Building and Non Building (SNI 03-1726-2012) revealed that earthquake distribution loads relatively equal for brick wall structure and non-brick wall structure. The difference of earthquake load approximately 10 percent among two type of structure. Thus, it could be concluded that static equivalent method is more reliable to estimate the earthquake load of the structure rather than other method. This research suggests that in the structural design practicality, the effect of brick wall should be considered as a part of the structural analysis model.Untuk keperluan analisis, sistem struktur biasanya dimodelkan sebagai struktur rangka terbuka, dimana hanya elemen-elemen struktur yang terbuat dari material beton saja yang disusun didalam pemodelan struktur. Adanya pasangan dinding bata pada sistem struktur akan mempengaruhi perilaku dari respon dinamik struktur pada saat terjadi gempa. Dari hasil analisis struktur dengan Metode Riwayat Waktu (Time History Analysis) menggunakan gempa El-Centro, didapatkan perbedaan nilai base shear yang cukup signifikan antara struktur dengan dinding bata yang dipasang monolit dengan struktur tanpa dinding bata. Base shear yang terjadi pada struktur dengan dinding bata lebih besar 20% dibandingkan dengan beban base shear yang terjadi pada struktur tanpa dinding bata. Jika hal ini tidak diperhatikan pada saat perencanaan struktur, maka struktur akan lebih mudah rusak jika terjadi gempa. Dari hasil analisis struktur dengan Metode Statik Ekivalen sesuai yang tercantum di dalam Tata Cara Perencanaan Ketahanan Gempa Untuk Struktur Gedung dan Non Gedung (SNI 03-1726-2012), didapatkan nilai distribusi beban gempa pada struktur gedung yang relative sama besar untuk bangunan dengan dinding bata dan tanpa dinding bata. Perbedaan besarnya distribusi gaya gempa untuk bangunan dengan dan tanpa dinding bata, kurang dari 10%. Dengan demikian dapat disimpulkan bahwa Metode Statik Ekivalen ini cukup aman digunakan untuk memperkirakan beban gempa yang bekerja pada struktur.

scholarly journals Special Moment Resistant Steel Buildings

2021 ◽  
pp. 444-448
Author(s):  
Deepan Dev B ◽  
Dr V Selvan
Keyword(s):  
Pushover Analysis ◽  
Time History ◽  
Nonlinear Time History Analysis ◽  
Building Structures ◽  
Braced Frames ◽  
Steel Buildings ◽  
Braced Frame ◽  
Moment Resisting ◽  
Frame Systems ◽  
Nonlinear Time History

The seismic response of special moment-resisting frames (SMRF), buckling restrained braced (BRB) frames and self-centering energy dissipating (SCED) braced frames is compared when used in building structures many stories in height. The study involves pushover analysis as well as 2D and 3D nonlinear time history analysis for two ground motion hazard levels. The SCED and BRB braced frames generally experienced similar peak interstory drifts. The SMRF system had larger interstory drifts than both braced frames, especially for the shortest structures. The SCED system exhibited a more uniform distribution of the drift demand along the building height and was less prone to the biasing of the response in one direction due to P-Delta effects. The SCED frames also had significantly smaller residual lateral deformations. The two braced frame systems experienced similar interstory drift demand when used in torsional irregular structures.

Shaking Table Model Test of Steel Frame Structure

2012 ◽  
Vol 166-169 ◽  
pp. 343-348
Author(s):  
Yu Sheng Cao ◽  
Ya Ling Zhao ◽  
Jie Li
Keyword(s):  
Time History ◽  
Shaking Table ◽  
Frame Structure ◽  
Acceleration Response ◽  
Scaled Model ◽  
Element Analysis ◽  
Table Model ◽  
History Of ◽  
Steel Frame Structure ◽  
Shaking Table Model Test

A1:4 scaled model made of steel is tested on the shaking table. The SAP2000 finite element analysis software is used to analyze the elastoplastic time-history of the model and to compare the results with the experimental data. The purpose of the test is to study the dynamic characteristics of the model’s structure as well as the model’s acceleration response and displacement response in different earthquakes. The experimental and the theoretical analysis basically obtained consistent results tested against each other.

scholarly journals Detection of Fracture in Steel Members of Building Structures by Microstrain Measurement

2020 ◽  
Vol 20 (5) ◽  
pp. 1720-1729
Author(s):  
Jun Iyama
Keyword(s):  
Structural Damage ◽  
Large Scale ◽  
Shaking Table Test ◽  
Pushover Analysis ◽  
Time History ◽  
Shaking Table ◽  
Building Structures ◽  
Test Beam ◽  
Force Amplitude ◽  
Local Stiffness

Abstract This paper discusses a possibility of detecting structural damage caused by an earthquake, by measuring the time history of the strain of beams and columns before and/or after the earthquake. An index called “local stiffness” is defined as the ratio of section force amplitude to representative displacement amplitude, and this ratio can be physically interpreted as stiffness. By calculating section force amplitude at a section or node from the measured strain amplitude under a microtremor or small aftershocks and comparing it with the results of a static pushover analysis, it becomes possible to detect any structural damage, such as fractures. This methodology was applied and the microstrain data of a steel moment frame were measured in a large-scale shaking table test; beam-end fractures were observed after some excitation tests. After the beam-end fracture formed, the measured local stiffness dropped significantly below the analysis value, indicating the possibility of employing this value to detect fractures using the analysis value as a threshold value.

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