Numerical study on modular slab–column steel structure based on simplified integrated floor

In spite of the high clear height and the convenient pipeline arrangement, the application of slab–column structures is still limited especially given the development trend of prefabricated steel structures. Therefore, an innovative modular slab–column steel structure is introduced to achieve advantages in architecture, structural performance, as well as prefabrication. First, the deformation mode and working mechanism of the integrated floor module are investigated based on cooperative deformation principle through theory and finite element analyses. Then, the principle is adopted again to obtain a simplified floor model. On the basis of the simplified floor, a series of building models are established and parametric analyses are conducted. The results indicate that the slab thickness and the size of columns may play different roles for the structures under gravity loads or lateral loads. Finally, the potential application scope of MSCSS is further discussed and some design recommendations are also proposed.

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PERBANDINGAN SIMPANGAN GEDUNG LANTAI RENDAH DENGAN MENGGUNAKAN 2 TIPE BRESING

EXTRAPOLASI ◽

10.30996/exp.v17i2.4431 ◽

2020 ◽

Vol 17 (2) ◽

pp. 35-44

Author(s):

Nurul Rochmah

Keyword(s):

Pacific Ocean ◽

Steel Structure ◽

Steel Structures ◽

Oceanic Plate ◽

Lateral Loads ◽

Continental Plate ◽

Eurasian Continent ◽

The Pacific ◽

The Pacific Ocean ◽

Eccentric Bracing

AbstractIndonesia is one of the areas where earthquakes often occur, one reason is that Indonesia is located on the border of the oceanic plate, namely the pacific ocean and the continental plate, namely the Eurasian continent. Where in these areas plate shifts often occur which cause frequent earthquakes.In minimizing casualties due to building failure due to earthquakes, one of them is necessary to make a building that has sufficient ductility so that in this study using a steel structure building.In steel structures, to make the structure more resistant to lateral loads, it is necessary to apply bracing. In this study, we try to compare the eccentric and concentric bracing displacement in steel structure buildings.Based on the results obtained from the comparison of these displacements, it is found those displacements due to eccentric bracing is smaller than the concentric bracing AbstrakIndonesia termasuk daerah yang sering terjadi gempa, salah sebabnya karena wilayah Indonesia terletak di daerah perbatasan lempeng samudera yaitu samudera pasisfik dan lempeng benua yaitu benua Eurasia. Dimana di daerah tersebut sering terjadi pergeseran lempeng yang menyebabkan sering terjadi gempa.Dalam meminimalisir korban akibat kegagalan bangunan akibat gempa salah satunya perlu membuat suatu bangunan yang mempunyai daktilitas yang cukup sehingga dalam penelitian ini memakai gedung struktur baja.Pada Struktur baja untuk lebih membuat struktur bisa tahan terhadap beban lateral maka perlu diberi bresing. Dalam penelitian ini mencoba untuk membandingkan simpangan bresing eksentrik dan konsentrik pada gedung struktur baja.Berdasarkan hasil yang diperoleh dari perbandingan simpangan tersebut, maka diperoleh simpangan akibat bresing eksentrik lebih kecil di banding bresing konsentrik.

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Design and numerical assessment of a rapid-construction corrugated steel-concrete-steel protective structure

International Journal of Protective Structures ◽

10.1177/2041419619830703 ◽

2019 ◽

Vol 10 (4) ◽

pp. 470-485 ◽

Cited By ~ 2

Author(s):

Sangwoo Jeon ◽

Samuel Edward Rigby

Keyword(s):

Numerical Study ◽

Near Field ◽

Steel Structure ◽

Steel Structures ◽

Cost Effective ◽

Protective Structure ◽

Rapid Construction ◽

Numerical Assessment ◽

Protective Structures ◽

Harmful Effects

A protective structure should be sufficiently resilient to protect its occupants from the harmful effects of an impact or explosion. In many instances, protective structures are also required to be assembled quickly, and be cost-effective. Steel-concrete-steel (SCS) sandwich structures combine the benefits of steel; ductility and anti-scabbing, and concrete; energy absorption and rigidity. Despite these favourable characteristics, the performance of profiled-plate steel-concrete-steel structures under blast and impact loads has yet to be studied in detail. This article presents the results from a numerical study investigating the efficacy of a newly proposed profiled-plate arched steel-concrete-steel structure under the loading from an extremely near-field high explosive detonation. It is observed that as arch thickness (concrete infill depth) increases, a greater proportion of energy is absorbed through concrete crushing and a larger concrete mass is mobilised. It is shown that a 240 mm arch thickness is adequate to resist the blast load from a 5.76 kg TNT charge, therefore proving the suitability of the proposed protective structure.

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Study of the elastic stiffness factor of steel structures with different lateral load resisting systems

International Journal of Advanced Engineering, Sciences and Applications ◽

10.47346/ijaesa.v1i2.26 ◽

2020 ◽

Vol 1 (2) ◽

pp. 6-11

Author(s):

Osamah Sarhan ◽

Mahdy Raslan

Keyword(s):

Pushover Analysis ◽

Steel Structure ◽

Steel Structures ◽

Elastic Stiffness ◽

Lateral Stiffness ◽

Span Length ◽

Lateral Loads ◽

K Value ◽

Different Types ◽

Bracing System

Steel structures, like other types of structures, are exposed to different types of loads, including lateral loads such as earthquake and wind. To resist such loading, lateral stiffness has a significant role. In this paper, the elastic stiffness factor (K) for different models of steel structure with various bracing systems and different parameters are compared. The comparison has been performed by analysing and studying the formation of plastic hinges applying the pushover analysis. The results illustrate that the increase in the number of stories reduces the K value, while the increase of span length increases it. Besides, the usage of the bracing system significantly increases the K value.

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Dynamic Characteristics of Base-Isolated Steel Frame under Seismic Ground Motion

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.2341 ◽

2011 ◽

Vol 255-260 ◽

pp. 2341-2344

Author(s):

Mohammad Saeed Masoomi ◽

Siti Aminah Osman ◽

Ali Jahanshahi

Keyword(s):

Ground Motion ◽

Base Isolation ◽

Time History ◽

Steel Structure ◽

Steel Structures ◽

Steel Frame ◽

Nonlinear Time History Analysis ◽

Seismic Load ◽

Vector Method ◽

Seismic Ground Motion

This paper presents the performance of base-isolated steel structures under the seismic load. The main goals of this study are to evaluate the effectiveness of base isolation systems for steel structures against earthquake loads; to verify the modal analysis of steel frame compared with the hand calculation results; and development of a simulating method for base-isolated structure’s responses. Two models were considered in this study, one a steel structure with base-isolated and the other without base-isolated system. The nonlinear time-history analysis of both structures under El Centro 1940 seismic ground motion was used based on finite element method through SAP2000. The mentioned frames were analyzed by Eigenvalue method for linear analysis and Ritz-vector method for nonlinear analysis. Simulation results were presented as time-acceleration graphs for each story, period and frequency of both structures for the first three modes.

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Numerical study of stable stratification effects on the wind over simplified tall building models using large-eddy simulations

Building and Environment ◽

10.1016/j.buildenv.2021.107625 ◽

2021 ◽

Vol 193 ◽

pp. 107625

Author(s):

Zhenqing Liu ◽

Weipeng Li ◽

Lian Shen ◽

Yan Han ◽

Zhiwen Zhu ◽

...

Keyword(s):

Numerical Study ◽

Stable Stratification ◽

Tall Building ◽

Large Eddy Simulations ◽

Building Models ◽

Large Eddy

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Experimental study on fatigue performance of Q420qD high-performance steel cross joint in complex environment

Asian Journal of Civil Engineering ◽

10.1007/s42107-021-00351-6 ◽

2021 ◽

Author(s):

Haigen Cheng ◽

Cong Hu ◽

Yong Jiang

Keyword(s):

Fatigue Life ◽

High Performance ◽

Steel Structure ◽

Steel Structures ◽

Fatigue Tests ◽

Fatigue Performance ◽

Corrosive Media ◽

Joint Connection ◽

High Performance Steel ◽

The Cross

AbstractThe steel structure under the action of alternating load for a long time is prone to fatigue failure and affects the safety of the engineering structure. For steel structures in complex environments such as corrosive media and fires, the remaining fatigue life is more difficult to predict theoretically. To this end, the article carried out fatigue tests on Q420qD high-performance steel cross joints under three different working conditions, established a 95% survival rate $$S{ - }N$$ S - N curves, and analyzed the effects of corrosive media and high fire temperatures on its fatigue performance. And refer to the current specifications to evaluate its fatigue performance. The results show that the fatigue performance of the cross joint connection is reduced under the influence of corrosive medium, and the fatigue performance of the cross joint connection is improved under the high temperature of fire. When the number of cycles is more than 200,000 times, the design curves of EN code, GBJ code, and GB code can better predict the fatigue life of cross joints without treatment, only corrosion treatment, and corrosion and fire treatment, and all have sufficient safety reserve.

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A New Approach for Cylindrical Steel Structure Deformation Monitoring by Dense Point Clouds

Remote Sensing ◽

10.3390/rs13122263 ◽

2021 ◽

Vol 13 (12) ◽

pp. 2263

Author(s):

Dongfeng Jia ◽

Weiping Zhang ◽

Yuhao Wang ◽

Yanping Liu

Keyword(s):

Steel Structure ◽

Steel Structures ◽

Point Clouds ◽

Deformation Monitoring ◽

Deformation Analysis ◽

Relative Deformation ◽

Structure Deformation ◽

Single Time ◽

Cylindrical Steel ◽

Cylinder Fitting

As fundamental load-bearing parts, the cylindrical steel structures of transmission towers relate to the stability of the main structures in terms of topological relation and performance. Therefore, the periodic monitoring of a cylindrical steel structure is necessary to maintain the safety and stability of existing structures in energy transmission. Most studies on deformation analysis are still focused on the process of identifying discrepancies in the state of a structure by observing it at different times, yet relative deformation analysis based on the data acquired in single time has not been investigated effectively. In this study, the piecewise cylinder fitting method is presented to fit the point clouds collected at a single time to compute the relative inclination of a cylindrical steel structure. The standard deviation is adopted as a measure to evaluate the degree of structure deformation. Meanwhile, the inclination rate of each section is compared with the conventional method on the basis of the piecewise cylinder fitting parameters. The validity and accuracy of the algorithm are verified by real transmission tower point cloud data. Experimental results show that the piecewise cylinder fitting algorithm proposed in this research can meet the accuracy requirements of cylindrical steel structure deformation analysis and has high application value in the field of structure deformation monitoring.

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