Ultraleichte, dünnwandige stabförmige Betonhohlbauteile unter Querkraft- und Torsionsbeanspruchung

承受剪切和扭转应力的超轻、薄壁、杆状空心混凝土构件

基本信息

  • 批准号:
    198434790
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    德国
  • 项目类别:
    Priority Programmes
  • 财政年份:
    2011
  • 资助国家:
    德国
  • 起止时间:
    2010-12-31 至 2019-12-31
  • 项目状态:
    已结题

项目摘要

Truss members can fulfill the idea "Form Follows Force in an excellent way. because they can be adjusted to the distribution of stresses in a concentrated and optimized way. Examples from building practice are two-dimensional and spatial truss models, girders, columns, and mast constructions. Currently. these are erected in steel at most. Developments like high-performance concretes and innovative reinforcement concepts open the way to an increasing use of reinforced concrete for light truss structures.The design of force-flow-optimized structural members can be advanced by taking into account bionic analogies and abstractions of natural structures. because they inherit an evolutionary optimization.Following the principle ''Light Constructions with Concrete", bamboo is a brilliant and inspiring example for ultra-light. thin-walled hollow concrete members.Research to the bearing capacity and deformation behavior of thin-walled hollow reinforced concrete members under general loads (axial force. flexure, shear and torsion) is rare and only some test evidence exists. ln the 1st period of the SPP 1542, the structural behavior of thin-walled hollow reinforced concrete members was investigated under predominant axial force or bending moment. The results show that. one can achieve a high bearing capacity despite a low use of material and high demands on resource-efficiency.Yet, the structural behavior under shear and torsion remains still unclear. Indeed. first comparative tests on bamboo sections encourage hopes that for those load cases. a bionically motivated optimization could lead towards good results.Currently, experimental basics are missing to verify the behavior under shear and torsion for wall thicknesses that just match the size of the concrete cover in non-hollow concrete cross sections. Similarly, failure mechanisms and robustness of thin-walled concrete members are inadequately researched.Under theses aspects, stabilizing measures utilizing the bionic example of bamboo can be anticipated at the system level like molded stiffeners or bulkheads. which are typical for steel construction but not yet common for reinforced concrete. Existing design models for other groups of structural members should be verified and adjusted for the comprehensive data out of the new tests.In the current, missing knowledge stands against the use of ultra-light hollow concrete members in building practice. For general use of such hollow concrete members and constitutive to the works during the 1st period of SPP 1542 further leading theoretical and experimental research on the load conditions shear and torsion becomes necessary. This should be conducted within the frame of the suggested project.As the expected result, then theoretical and detailing foundations will be laid for design, calculation and construction of thin-walled hollow concrete truss members under general loading conditions.
桁架构件可以很好地实现“形随力”的理念。因为它们可以以集中和优化的方式调整到应力分布。建筑实践中的例子有二维和空间桁架模型、梁、柱和桅杆结构。目前。它们最多是用钢建造的。高性能混凝土和创新的钢筋概念等发展为钢筋混凝土在轻型桁架结构中的应用开辟了道路。通过考虑仿生类比和自然结构的抽象,可以推进力流优化结构构件的设计。因为它们继承了一种进化的优化。遵循“混凝土轻结构”的原则,竹子是超轻建筑的一个辉煌和鼓舞人心的例子。薄壁空心钢筋混凝土构件,研究薄壁空心钢筋混凝土构件在一般荷载(轴力)作用下的承载力和变形性能。弯曲、剪切和扭转)是罕见的,只有一些试验证据存在。在SPP 1542的第一阶段,研究了薄壁空心钢筋混凝土构件在主要轴力或弯矩作用下的结构性能。结果表明,。尽管材料使用量少,对资源效率的要求高,但结构的承载力却很高。2然而,结构在剪切和扭转作用下的性能仍然不清楚。的确.第一次比较试验的竹部分鼓励希望,为这些负荷情况。目前,缺乏实验基础来验证壁厚与非空心混凝土横截面中混凝土保护层尺寸相匹配的剪切和扭转下的行为。同样,薄壁混凝土构件的破坏机理和鲁棒性研究不足,在这些方面,利用竹子的仿生例子,稳定措施可以预期在系统水平上,如成型加劲肋或舱壁。这对于钢结构是典型的,但对于钢筋混凝土还不常见。现有的其他结构构件设计模型应根据新试验的综合数据进行验证和调整,目前,知识的缺失不利于超轻空心混凝土构件在建筑实践中的应用。为了普遍使用这种空心混凝土构件,并在SPP 1542的第一阶段的工程构成进一步领先的理论和实验研究的负载条件剪切和扭转变得必要。本文的研究工作应在本工程的框架内进行,为一般荷载条件下混凝土薄壁空心桁架构件的设计、计算和施工提供理论和构造依据。

项目成果

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Professor Dr.-Ing. Martin Empelmann其他文献

Professor Dr.-Ing. Martin Empelmann的其他文献

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{{ truncateString('Professor Dr.-Ing. Martin Empelmann', 18)}}的其他基金

Fatigue of prestressed tendons
预应力筋的疲劳
  • 批准号:
    351987113
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Rissverhalten schiefwinklig bewehrter Stahlbetonbauteile
斜角加固钢筋混凝土构件的裂缝行为
  • 批准号:
    193075577
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Monolithische Balken und vorgespannte Segmentbauteile aus UHPC unter Torsions- und kombinierter Biege- , Querkraft- und Torsionsbeanspruchung.
由 UHPC 制成的整体梁和预应力节段组件,承受扭转以及弯曲、剪切和扭转组合载荷。
  • 批准号:
    157210662
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

相似海外基金

Dünnwandige Rohrprofile aus UHPC
UHPC 制成的薄壁管型材
  • 批准号:
    157354631
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
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