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首页> 外文期刊>Hydrotechnical Construction >IMPROVING THE SAFETY OF MASSIVE REINFORCED-CONCRETE STRUCTURES WITH CONTACT CONSTRUCTION JOINTS
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IMPROVING THE SAFETY OF MASSIVE REINFORCED-CONCRETE STRUCTURES WITH CONTACT CONSTRUCTION JOINTS

机译：带有接触式施工节点的大型钢筋混凝土结构的安全性

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摘要

Massive reinforced-concrete structures, which have characteristic features and which are distinguished from conventional reinforced-concrete structures, have come into widespread use in hydraulic construction. Massive reinforced-concrete structures are characterized by significant clearance dimensions (more than 1 m), a reduced reinforcement content (1% and less), comparatively low grades of concrete (V25 and lower), large effective-reinforcement diameters, etc. One of the basic features characteristic of virtually all massive structures is the existence of contact construction joints, which make themselves felt negatively on the behavior and condition of these designs, and structures on the whole. The existence of construction joints weakens the design and structures on the whole, and diminishes their strength and reliability while in service. Special measures are taken to reinforce the contact in the zone of the joints by removing the cement film, installing keyways and batters, etc. The strength of the joints is also increased with the use of reinforcing rods intersecting the contact joints. Shearing, compressive, and tensile forces, including their different combinations, may act on a contact joint, depending on the type of design, and the character of the load and its location. Provision for the required shear strength of the concrete joint is one of the most important problems.
机译：具有特征性且不同于传统的钢筋混凝土结构的大型钢筋混凝土结构已在水力建筑中得到广泛使用。大型钢筋混凝土结构的特点是：间隙尺寸较大（大于1 m），钢筋含量减少（小于等于1％），混凝土等级较低（V25及以下），有效钢筋直径较大等。几乎所有大型结构的基本特征是接触式施工缝的存在，这使他们对这些设计的行为和条件以及整个结构产生负面影响。施工缝的存在会从整体上削弱设计和结构，并降低其在使用中的强度和可靠性。通过去除水泥膜，安装键槽和面糊等，采取了特殊措施来加强接头区域中的接触。通过使用与接触接头相交的加强棒，还可提高接头的强度。剪切力，压缩力和拉力（包括它们的不同组合）可能作用在接触接头上，具体取决于设计的类型，负载的特性及其位置。提供所需的混凝土接缝抗剪强度是最重要的问题之一。

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