新型大跨度拉索支撑钢-混凝土复合楼板系统的优化设计

IF 3.1 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Meiwen Tan, Yifan Wu, Wenhao Pan, Guoming Liu, Wei Chen
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引用次数: 0

摘要

本文优化设计了一种新型大跨度缆索支撑钢-混凝土复合楼板系统,该系统采用简支撑单跨单支撑结构,旨在实现经济高效的解决方案和最小的钢材消耗。优化考虑了各种截面尺寸,遵循建筑标准和工程实践,并基于非线性编程(NLP)算法。考虑的活载荷参数范围为 2 至 10 kN/m2,跨度范围为 20 至 100 米。优化结果表明,在跨度小于 80 米、活载低于 8 kN/m2 的情况下,单支撑索支撑复合楼板具有很强的经济可行性。与传统的焊接工字钢复合楼板相比,缆索支撑系统可提供更具成本效益的横截面并减少钢材消耗。经济当量钢材消耗量可节省 20% 至 60%。关于最佳截面中钢索与钢梁面积比的讨论表明,在超大跨度情况下,辅助承重系统(即有效跨度为 L/2 的主梁弯曲)可能需要更多钢材。因此,在今后的研究中,应进一步探讨具有多个支柱和较小有效跨度的拉索支撑复合梁的经济效益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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, 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.
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来源期刊
Buildings
Buildings Multiple-
CiteScore
3.40
自引率
26.30%
发文量
1883
审稿时长
11 weeks
期刊介绍: BUILDINGS content is primarily staff-written and submitted information is evaluated by the editors for its value to the audience. Such information may be used in articles with appropriate attribution to the source. The editorial staff considers information on the following topics: -Issues directed at building owners and facility managers in North America -Issues relevant to existing buildings, including retrofits, maintenance and modernization -Solution-based content, such as tips and tricks -New construction but only with an eye to issues involving maintenance and operation We generally do not review the following topics because these are not relevant to our readers: -Information on the residential market with the exception of multifamily buildings -International news unrelated to the North American market -Real estate market updates or construction updates
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