SEismic performance of steel-concrete composite MOment REsisting frames – Effect of system reduction in testing and modelling (SEeMOREEffect)

钢-混凝土复合材料 MOment REsisting 框架的抗震性能 â 测试和建模中系统减少的效果 (SEeMOREffect)

• 批准号: 519098099
• 负责人: Dr.-Ing. Rebekka Winkler
• 金额: --
• 依托单位: Lehrstuhl für Stahl- , Leicht- und Verbundbau
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/519098099?language=en
• 关键词: SEismic; performance; steel; concrete; composite

This research plan outlines the intended investigations to be performed by the Chair of Steel, Lightweight and Composite Structures of the Ruhr-Universität Bochum on the influence of system reduction on the seismic performance of steel-concrete composite frames. The plan presents the background of moment resistant composite frame structures and on concrete-filled double steel tube columns, the effects of system reduction – conducted for reinforced concrete frames and pure numerical investigations so far – as well as a comprehensive work package plan. Steel-concrete composite moment-resisting frames (MRFs) with concrete-filled steel tubes (CFSTs) are modern structures that offer significant advantages as main load-bearing systems in building structures, especially under seismic loads. Concrete-filled double steel tubes (CFDST) are a meaningful and effective advancement of CFSTs. CFDST facilitate slender architectural solutions for high load-levels and speedy construction processes. The assessment of the overall performance and seismic behavior of such global structures is primarily based on experiments, which are mainly carried out on small units and reduced systems respectively. The reduction of such a global system into small units for experimental testing automatically leads to individual effects not being considered in the evaluation of the overall performance. Systematic studies on the influence of the system reduction in an experimental study on the seismic behavior of global frame structures are missing so far. Therefore, the principal research issues of the SEeMOREEffect-project are as follows: (i) What effect has the system reduction of a complex frame structure in a test set-up and experimental procedure on the fundamental behavior of modern composite MRF-structures under seismic loads? (ii) Could these effects in the same extent be captured in a reliable model, to predict the seismic behavior of frame substructures? (iii) And is it possible to capture these effects via analytical approaches to include them in a surrogate model in order to analyze the seismic behavior of global frame structures? The SEeMOREEffect-project aims at answering the questions by a comprehensive work program with numerical and analytical-based packages and the focus on a targeted and rigorous test program on large-scale test specimens. With this, the SEeMOREEffect-project is the first systematic study utilizing the direct comparison of experimental results on composite substructure and subassemblies to analyze the effect of the degree of system reduction and thus the influence of the experimental technique on the assessment of the global seismic behavior.

本研究计划概述了鲁尔大学波鸿钢结构、轻型结构和组合结构系主任对系统简化对钢-混凝土组合框架抗震性能影响的预期研究。该计划介绍了抗弯组合框架结构和双钢管混凝土柱的背景，系统缩减的影响-迄今为止对钢筋混凝土框架进行了纯数值研究-以及全面的工作包计划。钢管混凝土组合框架结构是一种新型的结构体系，作为建筑结构的主要承重体系，在地震荷载作用下具有显著的优越性。双层钢管混凝土是钢管混凝土结构的一个有意义的、有效的发展。CFDST为高负荷水平和快速施工过程提供了细长的建筑解决方案。这种整体结构的整体性能和抗震性能的评估主要是基于试验，主要是分别在小单元和简化系统上进行的。将这样一个全局系统简化为小单元进行实验测试，会自动导致在评估整体性能时不考虑个体效应。在试验研究中，系统地研究了体系折减对整体框架结构抗震性能的影响，目前尚属空白。因此，SEeMORENT项目的主要研究问题如下：（i）在地震荷载下，在现代复合材料MRF结构的基本行为的测试装置和实验过程中，复杂框架结构的系统简化有什么影响？(ii)这些影响是否可以在同一程度上被捕获在一个可靠的模型中，以预测框架子结构的抗震性能？(iii)是否有可能通过分析方法来捕捉这些影响，将它们包括在代理模型中，以分析全球框架结构的抗震性能？SEeMORETEST项目旨在通过一个全面的工作计划来回答这些问题，该工作计划包括基于数值和分析的软件包，并专注于针对大型试样的有针对性的严格测试计划。因此，SEeMORENT项目是第一个系统的研究，利用直接比较的实验结果的组合子结构和减震器，以分析系统的减少程度的影响，从而影响的实验技术对评估的全球地震行为。