scorpion yielding connector

Video from دِ سليمان اسماعيل الصافي

قد لا اوافق على الخلط ونسبة ونظافة المكونات لكني مندهش من اسلوب وطريقة مناولة الخرسانة المخلوطة وطريقة رفعها مع عامل العربة من الارض الى موقع الصب

قضبان_التسليح_الغير_معدنية
Non-Metallic Composite Reinforcing Elements
وهي عبارة عن قضبان غير معدنية مصنوعة من مواد مركبة من مواد زجاجية والبازيلتية وبوليميرية ومتواجدة بنفس اقطار حديد التسليح الاعتيادي.

وتمتاز بما يلي:
1- مقاومة الشد لها اعلى بثلاث مرات من مقاومة الشد لحديد التسليح صنف A-III.
2- المقاومة العالية للصدأ.
3- معامل التمدد الحراري لها مقارب لمعامل تمدد الخرسانه وبالتالي سوف تقلل بشكل كبير من حدوث التشققات بالخرسانه بسبب التمدد او التقلص.
4- آمن حيث انه لا يَبْعثُ اي موادَ سامّةَ اوضارّةَ، وغير قابلة للإشتعال، وغير موصل للتيار الكهربائي وموصل إلى موجات الراديوية.
5- اقل تكلفة من حديد التسليح الاعتيادي بنسبة (25-30)%
6- يمتاز بديموميته العالية حيث (وبحسب الشركة المنتجة له) ان الابنية المستخدمه في انشاءها هذه القضبان يمكن ان يصل عمرها الى 100 سنة .
7- اخف وزنا من الحديد الاعتيادي ب9 مرات وبالتالي سوف يسهل من حمله ونقله وتخفيف الاحمال على المنشآت.
8- يمكن استخدامه في معظم الاعمال الانشائية كالابنية ومدارج المطارات والجدران الساندة والاحواض المائية وغيرها.

Video from دِ سليمان اسماعيل الصافي

CAST CONNEX® Scorpion™ Yielding Connectors are modular, replaceable, standardized hysteretic fuses that provide enhanced ductility and improved performance in the retrofit of seismically deficient structures or for use in the Seismic Force Resisting System of new structures.

Modular High-Performance.

CAST CONNEX® Scorpion™ Yielding Connectors are modular, replaceable, standardized hysteretic fuses that provide enhanced ductility and improved performance in the retrofit of seismically deficient structures or for use in the Seismic Force Resisting System of new structures.

Each Scorpion Yielding Connector (SYC) consists of specially designed cast steel and fabricated elements which connect to and transmit forces between connected elements. The SYC is intended to remain elastic during ordinary building service loading and provides energy dissipation during a sizable earthquake through the cyclic inelastic flexural deformation of the SYC’s cast steel yielding fingers. The system exhibits a full, symmetric hysteresis characterized by an increase in stiffness at brace elongations greater than the design level. This increase in stiffness is a result of the second-order change in geometry of the yielding fingers, each of which is shaped to promote the spread of plasticity along its entire length.

As SYC devices are standardized, the cost and delay associated with additional project-specific testing is typically eliminated.
SYCs exhibit a stable and reliable post-yield stiffness which increases at large deformations. This behavior results in a better distribution of yielding over a building’s height and decreases the likelihood of the formation of a “soft story,” which is a significant concern with bracing elements that provide little or no post-yield stiffness like traditional Buckling Restrained Braces and friction damping systems.
Due to the high elastic stiffness of the SYC devices, the brace member selected by the engineer of record has a significant contribution to the elastic stiffness of the assembly. This uncouples the elastic stiffness from the yield load of the brace. With SYCs, engineers can design the system to have a low yield force and a high elastic stiffness, thereby minimizing expected story drifts while simultaneously reducing the seismic forces that develop in the lateral force resisting system during a design-level earthquake.
Unlike traditional Buckling Restrained Braces where the core of the brace is not accessible, the yielding fingers of the SYC device can be inspected for signs of significant damage after an earthquake event, offering building owners a way to gauge whether replacement of the brace is necessary. SYC devices can also be more readily replaced following a sizable earthquake.
Because all inelastic behavior is confined within the SYCs, engineers are provided with the flexibility to use the devices in several structural configurations, including a single bay, single storey X configuration – a configuration that reduces the number of frames which are obstructed by the lateral force resisting system and, in the case of retrofit, can reduce the costs of replacing building envelope and finishes after installation.
SYCs dissipate seismic energy through yielding of specially designed, triangular shaped steel yielding fingers. Unlike friction damping systems, the long-term behaviour of a hysteretic yielding system is well understood and the seismic properties of the device are not dependant on the long-term characteristics of normal force generating elements or frictional surfaces.
https://www.castconnex.com/products/scorpion-yielding-connectors

Audain Art Museum

Scorpion Yielding Connectors provide high ductility in building's BRBF bays

The Audain Art Museum will house a unique collection of British Columbia art in the heart of Whistler Village, and will be a pillar of the cultural tourism experience in Whistler. The building’s unique, raised design called for an enhanced seismic performance. Equilibrium leveraged the performance and modular versatility CAST CONNEX® Scorpion™ Yielding Connectors to provide high ductility in the building’s short buckling restrained braced frame (BRBF) bays.

Owner: Audain Art Museum Foundation
Architects: Patkau Architects
Structural Engineers: Equilibrium Consulting Inc.
General Contractor: Axiom Builders
Steel Fabricator: George Third & Son, Ltd.
Connection design and detailing: Somerset Engineering Group
Steel Erector: KWH Constructors

CAST CONNEX Scorpion Yielding Connectors on Discovery Channel's Daily Planet (hysteretic damper)

How it works- Isolation of Inelasticity in CAST CONNEX® Scorpion™ Yielding Connectors

Testing of a Full-Scale Steel Braced Frame Equipped with CAST CONNEX® High Strength Connectors

CAST CONNEX® Scorpion™ Yielding Connectors Full Scale Dynamic Test

scorpion yielding connector

سؤال من احدى مجموعات الواتس

السلام عليكم و رحمة الله وبركاته
دكاترتنا الافاضل الزملاء الاعزاء
عندي مشكله لنقاش اذا تكرمتو
حول

تحرير الجسور الغير مستمره وأثرها على العزم الناتج في الاعمده .

من خلال نتائج التحليل التى احصل عليها عند تصميمي لمشروع ما فان نتائج العزوم على الاعمدة صغير وغير مقنع ويعود السبب الى تحرير الجسور الغير مستمره .

ولان اتصال خرسانه العمود مع خرسانة جسور السطح يمثل نقطة جاسئة الى حدا ما بغض النظر عن كيفية اشتراك حديد الجسور مع حديد الاعمدة
وبتالي سينتج هناك عزم على العمود لم ياخذ بالحسبان اثناء التصميم .

هذه المشكلة جعلتني افكر في عمل تحرير للجسور الغير مستمره حتى انتهي من تصميم الجسور وعند وصولي الى تصميم الاعمدة وكذلك القواعد اقوم بالغا التحرير