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1.
本文根据美声演唱的具体需要,在分析了室内混响时间测量方式的基础上,以VRAS（可变室内声学系统）为例探究了室内声学系统建设的可行性及重要意义。 相似文献
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《Beton- und Stahlbetonbau》2018,113(5):348-359
Rib shear connectors with concrete break out failure subjected to tension or compressive loads – Part 1: Finite Element Analysis The shear connectors in steel‐concrete composite structures have to provide sufficient resistance against stresses acting orthogonally to the shear connection leading either to uplift of the concrete slab or mutual penetration of the steel girder and the concrete. While the anchoring behavior of headed studs has been extensively researched in the past, investigations in the load bearing behavior of composite dowels subjected to tension and compressive loads are missing, to date. Therefore, the present paper describes finite element investigations in the load bearing behavior of composite dowels exposed to loads acting orthogonally to the shear connection. The FE‐model, validated against tests from literature, is used to investigate the transfer of stresses between steel dowel and concrete and to clarify the influence of different parameters, like the effect of transversal reinforcement in the concrete and the size effect of the anchorage depth. In the second part, the FE‐results are used to derive engineering models and design approaches for composite dowels subjected to tension or compression. 相似文献
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Matthias Braun Renata Obiala Markus Schfer Ulrike Kuhlmann Ferdinand Reif Christoph Odenbreit 《Stahlbau》2019,88(7):642-652
Load‐bearing behaviour of CoSFB‐Dowels Slim‐floor or shallow floor construction is characterized by the integration of a steel beam into a slab. The activation of a composite action between the steel section and the concrete slab leads to a significant increase of the bending capacity and the stiffness of the beam, allowing for larger beam spans. This paper presents a fundamentally new method for assessing the load‐bearing capacity of CoSFB‐Dowels, which ensures a composite action of a composite slim‐floor beam (CoSFB). Based on detailed analysis of push‐out tests, extensive numerical simulations were performed in order to identify the contribution of various parameters on the load‐bearing capacity. Finally, an analytical formulation of the load‐bearing capacity is presented, which has been derived by applying a simple second order plasticity approach. 相似文献
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Rainer Malle 《Beton- und Stahlbetonbau》2009,104(1):37-47
Behaviour of Anchors Installed Perpendicular to Each Other in Two Faces of a Concrete Element Applications where anchors are installed in two faces of a concrete element perpendicular to each other (e. g. in a corner of a building or a column) and loaded simultaneously in tension or shear are not covered by the well‐known CC‐Method (CCDMethod). In order to investigate the load bearing behaviour tests were carried out. Based on the test results a design method is proposed. 相似文献
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介绍筛网印花橡胶导带的现状及其性能和使用情况,分析印花橡胶导带的使用过程中易出现的常见问题,并提出解决方法。 相似文献
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