NON-SUPPORTED CRASH BARRIERS - PROOF OF THE CONCRETE RESISTANCES ACCORDING TO THE CONCRETE-CAPACITY-METHOD

机译：无支撑的防撞墙-根据混凝土承载能力的方法证明混凝土的抗力

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Crash barriers (see fig. 1.) made of reinforced concrete shall protect the tunnel tube against exceptional effects caused by the traffic. These barriers are in generally fixed additional to the bearing precast concrete tunnel segments by bonded shear bolts. The proofs of the barrier's concrete failure mostly result from the method of Rasmussen according to "Deutscher Ausschuβ fuer Stahlbeton, Heft 346". The proofs of the concrete segment's failure results from the wellknown K - method. The Concrete-Capacity-Method provides a more economic design method and will be applied on the shear bolts of the non-supported crash barriers in the recent Elbtunnel project in Hamburg, Germany. As best possible solution a shear bolt with a diameter of 35mm and an effective anchorage depth of 220mm was designed. The bolt is bonded with hybrid resin mortar and is made of stainless steel A4-70 (316Ti). This paper will present the proofs according to the ETAG of Metal Anchors for use in concrete, Annex C considering all edge and axial influences. The edge influence results from both the external dimension and the screw joint bay's locations of the concrete lining elements. The results of pull-out tests for determining the characteristical resistance to proof the concrete pryout failure will be shown as well as the recommendations for additional reinforcement to transmit the shear force in the crash barriers. The summary compares the results of the CC-Method with those of the Method of Rasmussen and K - method respectively.

机译：由钢筋混凝土制成的防撞栏（见图1）应保护隧道管不受交通影响。这些屏障通常通过粘结的剪切螺栓固定在轴承预制混凝土隧道段之外。障碍物具体失效的证据主要是由Rasmussen根据“ DeutscherAusschuβfuer Stahlbeton，Heft 346”的方法得出的。混凝土节段破坏的证据来自众所周知的K-方法。 “混凝土承载力方法”提供了一种更经济的设计方法，并将在德国汉堡最近的Elbtunnel项目中的无支撑碰撞屏障的剪切螺栓上应用。作为最佳解决方案，设计了直径35mm，有效锚固深度220mm的剪切螺栓。该螺栓用混合树脂砂浆粘结，并由A4-70不锈钢（316Ti）制成。本文将根据用于混凝土的金属锚的ETAG提出证明，附件C考虑了所有边缘和轴向影响。边缘影响是由混凝土衬砌元件的外部尺寸和螺旋接缝位置引起的。将显示用于确定特征抗力以证明混凝土撬开破坏的拉拔测试结果，以及有关在防撞屏障中传递剪切力的附加加固的建议。摘要将CC方法的结果与Rasmussen方法和K方法的结果进行了比较。

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《Conference on Connections Between Steel and Concrete Vol.2 Sep 10-12, 2001 Stuttgart, Germany》|2001年|p.759-765|共7页
会议地点 Stuttgart(DE)
作者
Jochen Buhler;
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Fischerwerke, Germany;

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原文格式 PDF
正文语种 eng
中图分类建筑科学;
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NON-SUPPORTED CRASH BARRIERS - PROOF OF THE CONCRETE RESISTANCES ACCORDING TO THE CONCRETE-CAPACITY-METHOD

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