Optimal Design of a Novel Large-Span Cable-Supported Steel–Concrete Composite Floor System

Optimal Design of a Novel Large-Span Cable-Supported Steel–Concrete Composite Floor System

This paper optimizes the design of a novel large-span cable-supported steel–concrete composite floor system in a simply supported single-span, single-strut configuration, aiming for cost-effective solutions and minimal steel consumption. The optimization considers various cross-sectional dimensions,...

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Bibliographic Details
Published in:Buildings (Basel) Vol. 14; no. 1; p. 113
Main Authors: Tan, Meiwen, Wu, Yifan, Pan, Wenhao, Liu, Guoming, Chen, Wei
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-01-2024
Subjects:
Algorithms
Architectural design
Architecture
beam string structure
Bridges
cable-supported steel–concrete composite floor system
Cables
Civil engineering
Composite beams
Composite materials
Concrete
Concrete floors
Construction standards
Consumption
Cost analysis
Cost control
Cross-sections
Design optimization
Design techniques
economically equivalent steel consumption
Floor coverings industry
Flooring
Green buildings
I beams
Linear programming
Live loads
Load
Load bearing elements
long-span structures
non-linear programming (NLP)
Nonlinear programming
optimal design
Optimization algorithms
Seismic engineering
Steel
Steel beams
Struts
China
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Summary:This paper optimizes the design of a novel large-span cable-supported steel–concrete composite floor system in a simply supported single-span, single-strut configuration, aiming for cost-effective solutions and minimal steel consumption. The optimization considers various cross-sectional dimensions, adhering to building standards and engineering practices, and is based on a non-linear programming (NLP) algorithm. Parameters of live loads ranging from 2 to 10 kN/m2 and spans from 20 to 100 m are considered. The optimization results show that cable-supported composite floors with a single strut exhibit robust economic feasibility for spans of less than 80 m and live loads under 8 kN/m2. Compared to conventional composite floors with welded I-beams, the cable-supported system offers more cost-effective cross-sections and reduces steel consumption. The savings in economically equivalent steel consumption range from 20% to 60%. Discussion on the area ratio of cables to steel beam in the optimal cross-section reveals that the secondary load-bearing system (i.e., bending of the main beam with an effective span length of L/2) may require more steel in cases of ultra-large spans. Therefore, the economical efficiency of cable-supported composite beams with multiple struts and smaller effective span lengths warrants further exploration in future studies.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14010113