相关实验视频

Updated: Jan 13, 2026

Installation Method to Enhance Quality Control for Fiber Reinforced Polymer Spike Anchors

Installation Method to Enhance Quality Control for Fiber Reinforced Polymer Spike Anchors

Published on: April 10, 2018

嵌入在高强度地砂中的SBPDN条的定和结合强度

Takaaki Itoh¹, Ryoya Ueda², Bunka Son³

¹Toyota T&S Construction Co., Ltd., 65 Kamimukaida, Kamekubi-cho, Toyota 470-0375, Japan.

Materials (Basel, Switzerland)

|January 10, 2026

概括

钢条预应力变形正常放松 (SBPDN) 条为抗地震混凝土提供高强度. 确定了有效的定方法,确保了充分的收益率强度发展与适当的嵌入,虽然债券强度低于传统条.

科学领域:

土木工程土木工程是指土木工程.
材料科学材料科学材料科学
结构工程结构工程

背景情况:

对于耐地震混凝土组件来说,SBPDN条提供了超高的强度.
与传统的变形条相比,SBPDN条的较低的结合阻力需要有效的定解决方案.
在易发生地震的地区应用需要可靠的定和明确的结合强度.

研究的目的:

为了研究SBPDN条在砂中的有效 anchoring手段.
为了确定嵌入高强度接砂中的SBPDN条的结合强度.
为了促进SBPDN条在抗地震结构中的应用.

主要方法:

在 15 个 SBPDN 条 (直径 22.2 毫米) 进行了拉出测试,这些条被嵌入 60 MPa 粘合砂中.
多种不同的实验参数:端 anchorage 细节,外套管道直径和嵌入长度.
在不同的条件下评估固的有效性和结合强度.

主要成果:

螺母螺母和洗衣机或滚动螺纹的末端区域有效地防止过早滑动.
条径20倍或更长的嵌入长度允许SBPDN条的1275 MPa屈服强度的充分发展.
在砂 (2.843.98 MPa) 中的SBPDN条的结合强度明显低于常规变形条.

结论:

在耐地震组件中,SBPDN条可以通过适当的端和足够的嵌入长度来实现它们的高强度.
较低的结合强度需要对SBPDN条应用进行仔细的设计考虑.
开发的 anchoring方法和键强度数据支持在地震结构中使用SBPDN条.

关键词:

停泊位置停泊位置停泊位置债券的强度债券的强度债券的强度泥砂泥砂泥砂泥砂拉出阻力拉出阻力拉出阻力护套管道护套管道护套管道

更多相关视频

Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices

Solvent Bonding for Fabrication of PMMA and COP Microfluidic Devices

Published on: January 17, 2017

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives

Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives

Published on: May 17, 2020

相关概念视频

Bonding and Strength of Aggregate

Bonding and Strength of Aggregate

The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...

Mortar Properties

Mortar Properties

Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...

Reinforced Brick Masonry

Reinforced Brick Masonry

Reinforced brick masonry is an advanced construction technique that enhances the structural integrity of brick walls by incorporating steel reinforcements. These reinforcements are either placed within the hollow cores of bricks or sandwiched between two layers of masonry, known as wythes, and are then secured in place with grout. Grout is a fluid mixture composed of Portland cement, aggregate, and water, providing the necessary bonding agent for the steel and brick.
To fortify brick walls...

Accelerators

Accelerators

Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...

Preplaced Aggregate Concrete

Preplaced Aggregate Concrete

Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...