scholarly journals Pushover Analysis of Partially Strengthened Column Structures on an Existing Multi-story Building

2019 ◽  
Vol 280 ◽  
pp. 01003
Author(s):  
Mochamad Teguh ◽  
Novia Mahlisani ◽  
Fadillawaty Saleh
Keyword(s):  
Plastic Hinge ◽  
Pushover Analysis ◽  
Building Collapse ◽  
Column Structure ◽  
Significant Damage ◽  
Immediate Occupancy ◽  
Strength And Stiffness ◽  
Building Condition ◽  
Story Building

A pushover analysis was conducted to evaluate structuralperformance of an extended building structure subjected to simulatedseismic loads. The Inna Garuda Hotel was selected as a building object ofthis research focusing on the extension building only. This 7-storyreinforced concrete building has been functioned as a hotel building in theYogyakarta City of Indonesia for over 30 years. Preliminary results of thisanalysis indicated that the performance level of this building wascategorized as an immediate occupancy (IO), however, the plastic hingeson the slim column structure components occurred. Given this condition, the structure of the building does not fulfill the concept of a strong columnweakbeam (SCWB). The research objective is to follow up on thepotential of building collapse due to the column structure weakness byconducting a research on the strengthening of slim column elements. Apushover analysis was carried out using ETABS software. A strengtheningtechnique was adopted by enlarging the dimensions of the slim columngradually. In this study, the slim column was enlarged up to 300/650 mm(KJ-P5 model). The pushover analysis results of the KJ-P5 model haveshown the drift ratio is less than 1.0% for the four directions of thepushover with the level of immediate occupancy performance (IO). Referring to the recent building condition, the strengthened slim columnsdo not seem significant damage to the structural components of thebuilding resulting in a fulfilling of SCWB concept, where a similarcondition on their strength and stiffness as before the earthquake occurs. The results of the plastic hinge locations, as well as the performance levelsof the indicated slim columns in resisting overall structures, are extensivelydiscussed in this paper.

Procedural Assumption Comparison for Old Buildings via Pushover Analysis Including the ASCE 41 Update

2010 ◽  
Vol 26 (1) ◽  
pp. 187-208 ◽  
Author(s):  
Georgios Siahos ◽  
Stephanos Dritsos
Keyword(s):  
Plastic Hinge ◽  
Pushover Analysis ◽  
Performance Level ◽  
Safety Performance ◽  
Rc Buildings ◽  
Dynamic Analyses ◽  
Fema 356 ◽  
Nonlinear Dynamic Analyses ◽  
Seismic Tests ◽  
Story Building

The two different procedures of ASCE/SEI 41 Supplement 1 and the EC 8 based Greek Retrofitting Code (GRECO) are compared via pushover analyses for the seismic assessment of RC buildings designed to old codes. In addition, the FEMA 356 procedure is considered in order to evaluate the new provisions of ASCE/SEI 41. Results from two moderate level seismic tests performed on a four-story building are used for comparison. For the first test, all procedures overestimated the experimentally observed limited damage but GRECO was more satisfactory. For the second higher excitation test, all procedures predicted the building's high vulnerability but failed to predict the experimentally observed imminent collapse of a stiff column. In all cases, GRECO gave higher displacements. ASCE/SEI 41 and FEMA 356 predicted better the building's stiffness and gave much higher available plastic hinge rotations for beams when compared to GRECO. Concerning the columns, available plastic hinge rotations at the Life Safety performance level from the ASCE procedure were higher than GRECO, while ASCE values at the collapse prevention performance level were slightly lower than GRECO. Finally, a comparison of the above procedures with nonlinear dynamic analyses of a past earthquake is performed to identify potential pushover analysis concerns.

Structural Performance Evaluation with Pushover Analysis Case Study: The Integrated Central Surgery Building, Bethesda Hospital in Yogyakarta

2016 ◽  
Vol 845 ◽  
pp. 265-273 ◽  
Author(s):  
Edy Purwanto ◽  
Agus Supriyadi ◽  
Masbudi
Keyword(s):  
Evaluation Method ◽  
Pushover Analysis ◽  
Lateral Load ◽  
Performance Level ◽  
Performance Based Design ◽  
Performance Point ◽  
Drift Ratio ◽  
Significant Damage ◽  
Immediate Occupancy

The Earthquake causes damage to buildings and casualties. Design of buildings against earthquake loads is very important so during an earthquake the building does not collapse and no casualties. Especially for important buildings like the Ingrated Central Surgery Building or Gedung Bedah Sentral Terpadu (GBST) Bethesda Hospital Yogyakarta is expected to keep functioning and have not experienced significant damage after the earthquake. In performance based design, level of performance for hospital buildings is lmmediate Occupancy (IO). The purpose of this research is to know actually performance level of the structure GBST Bethesda Hospital in Yogyakarta. Evaluation method use is non-linear static analysis (Pushover). The lateral load determining by static equivalent analisys, the lateral load given monotonic in one direction step by step. Performance level determine in Capacity Spectrume Method according Applied Technologi Council (ATC 40,1996) the result is performance point and displacement targets method according Federal Emergency Management Agency (FEMA 356,2000). Structure performance level specified by drift ratio required by ATC 40 (1996). The result of evaluation according ATC 40 (1996) in the X direction obtained value of displacement at 0.174m, in the direction Y at 0.185m while the according FEMA 356 (2000) the displacement in direction X at 0.137m and Y direction at 0.179m. The value of drift ratio actual is less than 1% so the performance level for earthquake return period of 2500 years is the Immediate Occupancy.

scholarly journals Kajian Perbandingan Kinerja Struktur Dinding Geser Komposit Berdasarkan Tingkatan Gedung. (Hal. 20-29)

2019 ◽  
Vol 5 (3) ◽  
pp. 20
Author(s):  
Dimas EL Islamy ◽  
Erma Desmaliana ◽  
Nessa Valiantine Diredja
Keyword(s):  
Steel Plate ◽  
Pushover Analysis ◽  
Shear Wall ◽  
Steel Plate Shear Wall ◽  
Steel Shear Wall ◽  
Wall Shear ◽  
Immediate Occupancy ◽  
Strength And Stiffness ◽  
Spectrum Response ◽  
Composite Steel

ABSTRAKSalah satu metode untuk meminimalisir simpangan horizontal yang terjadi akibat gaya gempa pada struktur adalah dengan pemasangan dinding geser. Dinding geser mampu memberikan kekuatan dan kekakuan pada struktur gedung. Pada teknologi terkini, dinding geser komposit pelat baja mampu menggabungkan kelebihan dan mengkompensasi kekurangan dinding geser beton dan pelat baja.  Tujuan penelitian ini adalah untuk mengetahui efektifitas penggunaan dinding geser komposit terhadap tingkatan struktur gedung. Penelitian ini dilakukan pada tiga pemodelan struktur gedung dengan jumlah lantai yaitu 10 lantai, 20 lantai, dan 30 lantai dengan menggunakan metode respon spektrum dan analisis beban dorong. Hasil penelitian menunjukkan bahwa simpangan atap yang terjadi pada struktur dengan dinding geser lebih kecil dibandingkan struktur tanpa dinding geser. Berdasarkan analisis beban dorong, penggunaan dinding geser komposit pelat baja dengan tebal 110 mm untuk tiga pemodelan berada pada tingkatan yang sama yaitu IO (immediate Occupancy) yangmana kekuatan dan kekakuan pada gedung hampir sama dengan kondisi sebelum terjadi gempa.Kata kunci: dinding geser komposit pelat baja, respon spektrum, analisis beban dorong, simpangan horizontal ABSTRACTOne of the method to minimize the displacement of structure affected by earthquake is by using shear wall. Shear wall can influence the ductility and stiffness to the structure. On the most recent technology, composite steel plate shear wall can combining the advantages and compensate the disadvantages  of concrete and steel shear wall. This study was conducted by using three models buildings with 10 story, 20 story, and 30 story with spectrum response methods and pushover analysis. The result of this study shows that  drift’s roof on structure using shear wall is smaller than the structure without one. Based on pushover analysis, when structure using shear wall with thickness 110 mm for three models are the same level in immediate occupancy which strength and stiffness in buildings is almost the same as the condition before earthquake.Keywords: composite steel plate shear wall, respons spectrum, pushover analysis, displacement

scholarly journals Research on 3D Elastoplastic Seismic Performance of Reinforced Concrete Special-shaped Column Frame

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Y. Liu ◽  
L. Ye ◽  
Y. Teng
Keyword(s):  
Seismic Performance ◽  
Architectural Design ◽  
Plastic Hinge ◽  
Pushover Analysis ◽  
Engineering Application ◽  
Practical Experience ◽  
Frame Structure ◽  
Moment Curve ◽  
Frame Element ◽  
Column Structure

The special-shaped column structure system has more advantages than the rectangular column system in terms of architectural design and actual use. As a relatively new structural form, the concrete special-shaped column structure has not accumulated enough engineering practical experience. In this study, the rotation-moment curve of the plastic hinge of special-shaped column frame element was defined, the coupled PMM hinge applied to the frame element was studied, and the yield surface of the hinge was drawn. On this basis, an elastoplastic pushover analysis was conducted on a 12-storey special-shaped column frame model, its failure under different earthquakes was simulated, and its seismic performance was studied. The work of this article can provide reference for the engineering application of special-shaped column frame structure.

scholarly journals EVALUASI STRUKTUR GEDUNG DUAL SYSTEM DENGAN DINDING GESER BERSAYAP C MENGGUNAKAN PUSHOVER ANALYSIS

2020 ◽  
Vol 3 (4) ◽  
pp. 1233
Author(s):  
Albert Albert ◽  
Daniel Christianto ◽  
Hadi Pranata
Keyword(s):  
Line Element ◽  
Pushover Analysis ◽  
Safety Performance ◽  
Life Safety ◽  
Target Displacement ◽  
Uniform Load ◽  
Load Pattern ◽  
Fema 356 ◽  
Strength And Stiffness ◽  
Equivalent Strength

ABSTRACTAlthough elastic analysis gives a good indication of the elastic capacity and behavior of a building, but the elastic method can’t predict when the first yield will occur, and the failure mechanism and account for redistribution of member forces when the plastic hinges progressively formed. The use of inelastic procedure for evaluation is an attempt made by engineer in the past days to better understand how the structure will behave when subjected to strong earthquake, assuming the elastic capacity of the structure will be exceeded. In this research the pushover analysis was done using the modelling criteria of FEMA 356. The modeling of C-flanged shear was done using line element with the equivalent strength and stiffness properties. Target displacement was calculated using the displacement coefficient method of FEMA 356. Based on the analysis the triangular load pattern resulted in larger target displacement than the uniform load. But the uniform load pattern gives larger seismic response than the triangular load pattern. The uniform load pattern resulted in Life Safety performance level, while the triangular load pattern resulted in Immediate Occupancy, based on the two load patterns used the structure resulted in Life Safety performance level.ABSTRAKWalaupun analisis elastik memberikan indikasi yang baik mengenai kapasitas dan perilaku elastik dari suatu gedung, tetapi metode elastik tidak dapat memperkirakan kapan pelelehan pertama terjadi, serta mekanisme kegagalan apa yang mungkin terjadi pada bangunan tersebut, dan memperkirakan redistribusi dari gaya- gaya dalam ketika pembentukan sendi plastis secara progresif terjadi. Fungsi dari analisis inelastik, sebagai prosedur untuk mengevaluasi bangunan, yang merupakan usaha dari insinyur-insinyur terdahulu memahami bagaimana struktur akan berperilaku apabila dikenai gempa kuat, dimana diasumsikan bahwa kapasitas elastik gedung telah terlampaui. Dalam penelitian ini dilakukan pushover analysis menggunakan kriteria pemodelan berdasarkan FEMA 356. Pemodelan dari dinding geser bersayap C dilakukan menggunakan line element dengan kekuatan dan kekakuan yang ekivalen. Target perpindahan dianalisis menggunakan metode coefficient of displacement dari FEMA 356. Berdasarkan analisis yang dilakukan didapat bahwa pembebanan segitiga lebih besar dibandingkan pembebanan merata. Namun, respons seismik yang didapat akibat beban merata, lebih besar dibandingkan beban segitiga. Pembebanan merata menghasilkan tingkatan kinerja Life Safety, sedangkan pembebanan segitiga menghasilkan tingkatan kinerja Immadiate Occupancy, berdasarkan kedua pembebanan tersebut didapat kinerja dari struktur tersebut adalah Life Safety.

scholarly journals Studi Perbandingan Analisis Struktur Rumah 2 Lantai Menggunakan Kayu Glulam dan Kayu Solid Terhadap Beban Gempa. (Hal. 85-94)

2019 ◽  
Vol 5 (1) ◽  
pp. 85
Author(s):  
Ramdhan Taufik ◽  
Erma Desmaliana ◽  
Amatulhay Pribadi
Keyword(s):  
Construction Material ◽  
Pushover Analysis ◽  
Solid Wood ◽  
Wood Products ◽  
Basic Material ◽  
Class Iii ◽  
Base Shear ◽  
Non Linear ◽  
The Difference ◽  
Immediate Occupancy

ABSTRAKKondisi geografis Indonesia memiliki struktur tektonik kompleks. Kondisi ini membuat perencanaan rumah tinggal 2 (dua) lantai membutuhkan pertimbangan khusus dari segi kekuatan dan kekakuan. Penggunaan material kayu sebagai bahan konstruksi di Indonesia masih jarang digunakan. Kayu glulam adalah suatu produk kayu rekayasa yang dibuat dari beberapa bilah kayu yang direkatkan dengan arah sejajar serat menggunakan perekat berupa lem. Penelitian ini bertujuan untuk mengidentifikasi respon struktur pada rumah tinggal menggunakan material kayu glulam dan solid dengan bantuan program ETABS 2016. Berdasarkan analisis yang telah dilakukan, diperoleh nilai periode struktur, gaya geser dasar, dan simpangan antar lantai antara seluruh model menunjukan hasil yang berbeda, perbedaan diakibatkan dari hasil konversi berat jenis dan modulus of elastisity berdasarkan BS EN 1194:1999. Berdasarkan analisis non-linier pushover didapatkan bahwa kayu glulam Nyatoh (kayu kelas III) berada pada level pada kinerja B to IO (Immediate Occupancy), dimana hasil tersebut tidak berbeda jauh dengan kayu solid Bangkirai (kayu kelas I).Kata Kunci: rumah tinggal, kayu glulam, non-linier pushover ABSTRACTGeographical condition of Indonesia has a complex tectonic structure. These conditions create  2-storyhome-planning that require special consideration in terms of strength and rigidity. The use of wood as a construction material in Indonesia is still rarely used. Glulam wood is a wood products engineering made from wooden slats several glued with the direction of the parallel fibers using adhesives. This research aims to identify the structure of the response at home using basic material glulam and solid wood with the help of ETABS 2016 programs. Based on the analysis that has been done, obtained the value of the structure periode, base shear force, and interstory drift between all models show different results, the difference is due to the results of specific gravity conversion and modulus of elasticity base on BS EN 1194:1999. Based on non-linear pushover analysis, it shows that Nyatoh glulam wood (class III wood) was at the level of the B to IO (Immediate Occupancy) performance, where the results were not much different from Bangkirai solid wood (class I wood).Keywords: home livingstructure, glulam wood, non-linear pushover

scholarly journals Evaluasi Struktur Bangunan Pasar Inpress Blok IV Gedung B dengan Metode Pushover

CIVED ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 117
Author(s):  
Lisyana Junelin Restu ◽  
Eka Juliafad ◽  
Fajri Yusmar
Keyword(s):  
Pushover Analysis ◽  
Performance Level ◽  
Structural Performance ◽  
Risk Category ◽  
Structural Elements ◽  
Analysis Method ◽  
Earthquake Loads ◽  
Tsunami Risk ◽  
Vertical Evacuation ◽  
Immediate Occupancy

AbstractInpres market block IV Pasar Raya Padang is not designed as a shelter building, but is designated as a vertical evacuation site when a tsunami occurs. This study aims to evaluate the structural performance of Inpress market block IV zone B. The method used for this research is the pushover analysis method. According to FEMA P-646/2019, vertical evacuation refuge structures are included in tsunami risk category IV, based on the risk category the maximum performance level is at the Immediate Occupancy (IO). For loads on buildings, refer to SNI 1727:2020 and SNI 1726:2019 for earthquake loads. For the calculation of the capacity of concrete structural elements, refer to SNI 2847:2019. Structural analysis was carried out using the SAP2000 version 16. After analysis, based on performance points, drift ratio that occur due to earthquake loading in X-direction and Y-direction are 0,05875% and 0,0067%. The maximum total drift that occurs is smaller than that required by ATC-40 for the Immediate Occupancy performance level, which is 1%. Thus, the structure performance level is Immediate Occupancy. This means that the Inpress market block IV building is still strong enough against earthquake loads.

scholarly journals EVALUASI KINERJA STRUKTUR GEDUNG BETON BERTULANG METODE PUSHOVER ANALYSIS

2020 ◽  
Vol 12 (2) ◽  
pp. 104-109
Author(s):  
Junaidin Aswar
Keyword(s):  
Pushover Analysis ◽  
Fema 356 ◽  
Immediate Occupancy

      Quest Hotel yang terletak di Yogyakarta merupakan bangunan tempat tinggal yang di peruntukan untuk para pengunjung wisata maupun orang-orang yang punya kepentingan lain yang datang di Yogyakarta, bangunan ini merupakan bangunan bertingkat 10 lantai serta memiliki ketinggian 33,45 m. Sebuah struktur bangunan harus direncanakan sesuai dengan kaidah-kaidah perencanaan yang berlaku, sehingga dampak yang disebabkan oleh gempa dapat menahan guncangan yang telah direncanakan. Penelitian ini dilakukan dengan tujuan untuk mengetahui nilai gaya lateral maksimal serta displacement yang terjadi pada gedung dan bagaimana level kinerja berdasarkan metode FEMA 356. Besarnya  gaya lateral maksimum pada arah x = 8034,753 kN pada step 9 dengan displacement sebesar -0,042530 m dan pada arah y gaya lateral maksimum = 7055,847 kN pada step 7 dengan displacement sebesar -0,066046 m. Hal ini menunjukan bahwa struktur gedung lebih kuat menahan gaya lateral dari arah-x dibandingkan dari arah-y. Berdasarkan hasil perhitungan analisis static non-linier, dari nilai target perpindahan maka diperoleh nilai drift aktual arah-x = 0,00484 (0,484%) dan nilai drift actual arah-y = 0,00773 (0,73%). Hal ini menunjukkan bahwa bangunan tidak mengalami kerusakan komponen struktur. Kekuatan dan kekakuan gedung masih hampir sama dengan kondisi sebelum struktur dilanda gempa,  pada keadaan ini gedung yang ditinjau adalah termasuk  pada level kinerja Immediate Occupancy (IO). Kata Kunci: Displacement, FEMA 356, Pushover, Quest Hotel.

scholarly journals PENGARUH SETBACK PADA BANGUNAN DENGAN SOFT STORY TERHADAP KINERJA STRUKTUR AKIBAT BEBAN GEMPA

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Rizki Efrida
Keyword(s):  
Pushover Analysis ◽  
Skeletal Structure ◽  
Engineering Construction ◽  
Ground Floor ◽  
Soft Story ◽  
Pushover Curve ◽  
Earthquake Load ◽  
Collapse Behavior ◽  
Story Building ◽  
Storey Building

Pembangunan konstruksi teknik sipil mengalami perkembangan yang sangat pesat seiring dengan berkembangnya zaman sehingga menuntut kita lebih kreatif dalam perancangan struktur baik dalam bentuk bangunan beraturan maupun tidak beraturan yaitu, bangunan setback dan bangunan soft story. Di Indonesia, tantangan yang dihadapi dalam kontruksi gedung bertingkat adalah adanya resiko akibat gempa. Salah satu metode untuk menganalisis beban gempa adalah analisis pushover. Analisis pushover merupakan prosedur analisis untuk mengetahui perilaku keruntuhan suatu bangunan terhadap gempa. Penelitian dilakukan untuk mengetahui seberapa besar pengaruh setback dan soft story yaitu bangunan tanpa dinding pengisi pada lantai dasar terhadap kinerja struktur akibat beban gempa berdasarkan hasil kurva pushover. Stuktur bangunan dimodelkan sebagai portal 2 dimensi yang tanpa adanya dinding pengisi pada lantai dasar yaitu terdiri dari 4 model rangka penuh, setback1, setback2, dan setback3. Hasil analisis dalam penelitian ini menunjukkan bahwa kontribusi dinding pengisi yang terbuat dari dinding bata mempengaruhi kekakuan lateral struktur, serta dengan dikuranginya setback pada struktur bangunan mengakibatkan nilai kekakuan semakin kecil sehingga nilai daktilitas semakin besar. Pada struktur gedung rangka penuh dan setback1 lunak kondisi bangunan sudah mengalami rusak parah atau runtuh saat terjadi gempa kuatdikarenakan terbentuknya sendi plastis pada kolom lantai pertama.  Kata Kunci : Analisis Pushover, Dinding Pengisi, Setback, Soft Story  ABSTRACT The construction of civil engineering construction has developed very rapidly along with the development of the era so it demands that we are more creative in the design of structures both in the form of irregular and irregular buildings ie, setback building and soft story building. In Indonesia, the challenge faced in the construction of multi-storey building is the risk caused by the earthquake. One method to analyze earthquake loads is pushover analysis. Pushover analysis is an analytical procedure to determine the collapse behavior of a building against earthquake. The research was conducted to find out how big the effect of setback and soft story that is building without wall filler on the ground floor to the structure performance due to earthquake load based on the result of pushover curve. The structure of the building is modeled as a 2-dimensional portal without the filler wall on the ground floor consisting of 4 full frame models, setback1, setback2, and setback 3. The results of the analysis in this study indicate that the contribution of wall filler made of brick walls affect the lateral stiffness of the structure, as well as with the reduced setback on the structure of the building resulting in smaller stiffness value so that the greater the ductility value. In full skeletal structure and soft setback1 the condition of the building has been severely damaged or collapsed during a strong earthquake due to the formation of plastic joints in the first floor column. Keywords: Pushover Analysis, Setback, Soft Story, Wall Filler

Investigation of Plastic Hinge Length in Reinforced Concrete Columns on Column Behavior

2017 ◽  
Vol 21 ◽  
pp. 45-49
Author(s):  
Mehmet Kamanli ◽  
Alptug Unal
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Pushover Analysis ◽  
Concrete Columns ◽  
Analysis Program ◽  
Reinforced Concrete Buildings ◽  
Reinforced Concrete Columns ◽  
Concrete Buildings ◽  
Horizontal Stability ◽  
Plastic Hinge Length

In reinforced concrete buildings in case of a possible earthquake, the buildings slamp as they lost their horizontal stability because of hinging of column ends. The assumptions for plastic hinge lengths are present during project stage of reinforced concrete buildings. According to Turkish Earthquake Regulations, although plastic hinge length is determined to be 0.5h, it's known that plastic hinge length is determined via various formulas in some other regulations all over the world. In reinforced concrete columns, it's necessary to indicate the effect of plastic hinge length on the column behavior. For this purpose, pushover analysis of 5 column samples having different plastic hinge lengths was performed with non-linear analysis program. As a result of pushover analysis, situations of plastic hinges formed in columns and their load-displacement curves were determined. The graphs and the data were compared and the results were discussed.

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