REUSE SYSTEM OF BUILDING STEEL STRUCTURES : Structural performance of reusable members

Longevity, reuse and recycle can be effective in reducing environmental burden in the life cycle of building steel structures. Longevity is the most crucial element in reducing the environmental burden of building steel structures. Nevertheless, there are always a number of buildings that need to be demolished for physical, architectural, economic, and social reasons. When such building steel structures have been demolished in the past, their structural members have been scrapped for recycling. Steel, by nature, is the only type of structural member that can be fabricated. Even without special joints that facilitate demolition work, steel members can be reused after minor fabrication procedures such as cutting, drilling, and welding. In this paper we discuss structural performance of reusable members and practical examples using reusable members.

Download Full-text

Structural Performance of Automated Multi-Depth Shuttle Warehouses (Amsws) Under Low-to-Moderate Seismic Actions

10.21203/rs.3.rs-351252/v1 ◽

2021 ◽

Author(s):

Aleksei Kondratenko ◽

Alper Kanyilmaz ◽

Carlo Andrea Castiglioni ◽

Francesco Morelli ◽

Mohsen Kohrangi

Keyword(s):

Seismic Design ◽

Brittle Failure ◽

Structural Characteristics ◽

Time History ◽

Steel Structures ◽

Current Approach ◽

Structural Performance ◽

Future Design ◽

The Future ◽

Base Connections

Abstract Automated Multi-Depth Shuttle Warehouses (AMSWs) are compact storage systems that provide a large surface occupation and therefore maximum storage density. AMSWs represent the future of storage technology, providing substantial savings in terms of cost, space, and energy with respect to traditional warehouses. Currently, designers refer to the standard building codes for the seismic design of AMSWs. Since structural characteristics of AMSWs are considerably different from the steel structures of typical buildings, this current approach used by designers is questionable in terms of safety and efficiency. In this article, the behavior of 5 AMSW structures has been studied performing 150 time-history analyses by direct integration including P-Delta effects. Demand/capacity ratios calculated for each element showed the dominance of the brittle failure mechanism in AMSWs subjected to low-to-moderate seismic actions. These mechanisms mainly took place in upright columns and their base connections prior to the activation of ductile energy dissipation mechanisms of the structure. Based on the results, further improvements have been recommended for the future design provisions, which may lead to a safer seismic design of AMSWs.

Download Full-text

DISCUSSION ON "SIMPLE COLUMN BASE SYSTEM OF STEEL STRUCTURES EMPLOYING STEEL FIBER REINFORCED CEMENTITIOUS COMPOSITE -Experiment on structural performance of basic model and applied model-" (Yoshio KANEKO, Hirozo MIHASHI, Kazuki KIRIKOSHI and Yuki SUWANAI, J. Struct. Constr, Eng., AIJ, No.600, 179-186, Feb., 2006)

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.72.171_2 ◽

2007 ◽

Vol 72 (614) ◽

pp. 171-172

Author(s):

Katsuki TAKIGUCHI

Keyword(s):

Steel Fiber ◽

Steel Structures ◽

Structural Performance ◽

Base System ◽

Cementitious Composite ◽

Fiber Reinforced ◽

Applied Model ◽

Basic Model ◽

Simple Column ◽

Column Base

Download Full-text

Calibrating Partial Factors – Methodology, Input Data and Case Study of Steel Structures

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.12822 ◽

2019 ◽

Cited By ~ 1

Author(s):

Vitali Nadolski ◽

Árpád Rózsás ◽

Miroslav Sýkora

Keyword(s):

Input Data ◽

Structural Reliability ◽

Construction Materials ◽

Steel Structures ◽

Structural Performance ◽

Limit States ◽

Different Types ◽

Load Effects ◽

Previous Design

Partial factors are commonly based on expert judgements and on calibration to previous design formats. This inevitably results in unbalanced structural reliability for different types of construction materials, loads and limit states. Probabilistic calibration makes it possible to account for plentiful requirements on structural performance, environmental conditions, production and execution quality etc. In the light of ongoing revisions of Eurocodes and the development of National Annexes, the study overviews the methodology of probabilistic calibration, provides input data for models of basic variables and illustrates the application by a case study. It appears that the partial factors recommended in the current standards provide for a lower reliability level than that indicated in EN 1990. Different values should be considered for the partial factors for imposed, wind and snow loads, appreciating the distinct nature of uncertainties in their load effects.

Download Full-text

Structural Performance of Cold-Formed Steel Structures with Bolted Connections

Advances in Structural Engineering ◽

10.1260/1369433054349132 ◽

2005 ◽

Vol 8 (3) ◽

pp. 231-245 ◽

Cited By ~ 5

Author(s):

K. F. Chung

Keyword(s):

Steel Structures ◽

Internal Force ◽

Structural Performance ◽

Bolted Connections ◽

Structural Behaviour ◽

Moment Connections ◽

Analysis And Design ◽

Lap Shear ◽

Numerical Predictions ◽

Cold Formed Steel

This paper presents a number of experimental and theoretical investigations into the structural behaviour of cold-formed steel structures with bolted connections. Firstly, the basic deformation characteristics of bolted fastenings between cold-formed steel strips in lap shear tests is described, and advanced finite element modelling with solid elements as well as contact elements is carried out for comparison. Secondly, the structural behaviour of lapped Z sections with bolted moment connections is reported, and both analytical and numerical predictions on strength and stiffness of lapped Z sections are presented. Finally, the structural performance of double span lapped Z purlins is investigated numerically where the effects of lapped Z sections over internal supports on the internal force distributions along the purlin members are examined. The description is intended to provide both analysis and design methods as well as understandings to structural engineers, enabling them to design and build cold-formed steel structures rationally with improved structural performance.

Download Full-text

Analisis Kinerja Bangunan Rangka Baja dengan Bresing Tahan Tekuk terhadap Beban Gempa

RekaRacana: Jurnal Teknil Sipil ◽

10.26760/rekaracana.v6i2.98 ◽

2021 ◽

Vol 6 (2) ◽

pp. 98

Author(s):

Ilham Ilham

Keyword(s):

Pushover Analysis ◽

Time History ◽

Steel Structures ◽

Time History Analysis ◽

Nonlinear Time History Analysis ◽

Structural Performance ◽

History Analysis ◽

Immediate Occupancy ◽

Nonlinear Time History ◽

Modal Pushover

ABSTRAKPenggunaan bresing tahan tekuk dapat menjadi solusi atas kebutuhan struktur tahan gempa di Indonesia. Disipasi energi pada elemen bresing tahan tekuk dilakukan melalui kinerja plastifikasi bagian inti bresing akibat beban tarik dan tekan. Penelitian ini berisi kajian kinerja dari bangunan rangka baja beraturan dengan bresing tahan tekuk (BRB) dengan variasi level ketinggian lantai yaitu 3 lantai, 8 lantai dan 15 lantai. Analisis struktur 3D dilakukan dengan dua prosedur analisis yaitu modal pushover dan nonlinear time history pada program ETABS. Hasil analisis menunjukkan bahwa pemilihan elemen BRB sangat mempengaruhi kinerja struktur, yang terlihat dari pola drift yang terjadi. Untuk struktur beraturan dengan berbagai ketinggian, tingkat kinerja struktur dengan BRB cukup baik, yaitu Immediate Occupancy (IO) akibat beban gempa rencana. Plastifikasi hanya terjadi pada BRB, dan kelelehan pada balok mulai terbentuk sampai mekanisme keruntuhan terjadi. Hasil modal pushover dengan nonlinear time history pada bangunan 15 lantai yang cukup mirip menunjukkan bahwa modal pushover dapat digunakan untuk memprediksi kinerja struktur BRB yang beraturan.Kata kunci: kinerja struktur, bresing tahan tekuk, immediate occupancy, modal pushover, nonlinear time history ABSTRACTBuckling restrained braces (BRB) can be an alternative solution for earthquake resistant steel structure in Indonesia. The energy dissipation for buckling restrained elements is conducted through yielding of the core due to tension or compression forces. This study presents an evaluation of the structural performance of steel structures with BRB varying in heights, 3-story, 8-story and 15-story. The 3D structural analysis was carried out with ETABS software using 2 methods, Modal Pushover and Nonlinear Time History. The results shows that the selection of BRB elements greatly affected the structural performance, showed by the drift pattern. For regular structures with variation in heights, structures with BRB behaved satisfactory under the design load with the performance level of Immediate Occupancy (IO). Yielding was limited to BRB members, and afterwards the yielding occurred on beams until collapse. The results of modal pushover and time history analysis for 15-story structure are similar, thus modal pushover can be used to predict the performance of regular structural system with BRB.Keywords: structural performance, buckling restrained brace, immediate occupancy, modal pushover analysis, nonlinear time history analysis

Download Full-text