Results 21 to 30 of about 764 (184)

Analytical Study about the Behavior of Prestressed Composite Steel Beams [PDF]

Kirkuk Journal of Science, 2010
prestressing is the deliberate creation of permanent internal stresses in a structure or a system in order to improve it’s performance under service loads. Such stresses are designed to counter act those induced by external loading.
Saad F. Salih Miged
doaj   +1 more source

ULTIMATE FLEXURAL BEHAVIOUR OF EXTERNALLY PRESTRESSED NEW BEAMS AND DISTRESSED BEAMS [PDF]

Journal of Engineering Science and Technology, 2015
External prestressing has become a popular technique in retrofitting of distressed concrete structures, mainly bridges. It is being successfully used in segmental construction of new bridges, which is evident in metro constructions and other types of ...
R. SENTHIL, R. MANISEKAR
doaj  

Pull-out test of carbon-fiber composite cable (CFCC) tendon for an internal anchorage

Case Studies in Construction Materials, 2023
An internal strengthening system involving the embedding of a post-tensioned prestressing tendon in a wedge-shaped anchorage of an existing concrete member was developed previously.
Takafumi Mihara, Isamu Yoshitake, Tatsuya Kitada, Masaki Ono   +3 more
doaj   +1 more source

FIELD LOADING-TEST BASED SHM SYSTEM SAFETY STANDARD DETERMINATION [PDF]

Civil Engineering Journal, 2020
Structural health monitoring (SHM) allows for real-time structural response monitoring and online data acquisition of bridge structures. Thisdata reflectsthe operational and environmental conditions of the bridge, which is important in ...
Jiaping Yu, Chunwei Li, Quansheng Sun
doaj   +1 more source

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

Advanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia, Rogelio Ortigosa, Jesús Martínez‐Frutos, Daniel Garcia‐Gonzalez   +3 more
wiley   +1 more source

Prestressing for Reduction of Local Vibrations in a Rotorcraft

Engineering Transactions, 2016
The main objective of this paper is to investigate the possibility of local structural vibration suppression via introducing initial prestressing. In order to evaluate the effectiveness of the proposed method, a two-step approach has been used.
Grzegorz SUWAŁA, Lech KNAP, Jan HOLNICKI-SZULC   +2 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Research Status of Structural Optimization Design, Materials, and Prestressing Techniques for PC Small Box Beams: A Review of Research Progress [PDF]

预应力技术
Based on recent research findings and an analysis of the literature on Precast concrete (PC) small box girders, this paper presents a systematic discussion of the optimization design, materials, and prestressing techniques for PC small box girder ...
Fangyuan Li, Luda Li
doaj   +1 more source

Behavior of composite beams with external prestressing in sagging moment regions

Revista IBRACON de Estruturas e Materiais, 2021
Prestressed composite steel-concrete structures are scarcely used due to a lack of clear standardized design guidelines and formulations on the subject.
Karla Demoner Ribeiro, Thiago Tononi Turini, Lorenzo Augusto Ruschi e Luchi, Adenilcia Fernanda Groberio Calenzani   +3 more
doaj   +1 more source

Autonomous Locomotion of Tensegrity Structure on Low‐Temperature Surfaces

Advanced Robotics Research, EarlyView.
A low‐temperature responsive tensegrity structure (LRTS) is constructed by integrating low‐responsive temperature liquid crystal elastomer (LCE) cables, nonresponsive cables, and stiff rods. The low phase transition temperature of LCE is achieved by introducing a new liquid crystal mesogen.
Changyue Liu, Kai Li, Tianyu Li, Zixuan Wang, Jiping Yang, Zhijian Wang   +5 more
wiley   +1 more source