Experimental Study on a Web Shear Design Equation for Composite Precast Concrete Hollow Core Slabs

Due to the large increase in the use of precast concrete structures in multistory buildings, this work covers a study on the behavior of beam-column connection with emphasis on the continuity provided by the slab reinforcement. Two prototypes were tested, each one with a different detail of the continuity reinforcement distribution. In both connections, the steel area used on the concrete cover of the hollow core slab was the same, varying the amount of bars that passed through the column and the ones that were placed adjacent to the column. The experimental results showed that the connection with bars adjacent to the column presented stiffness increase and a better cracking control. According to the classification the two tested connections can be considered semi-rigid.

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Experimental Study on the Concept of Hollow-Core Photonic Bandgap Fiber Stethoscope

International Journal of Optics ◽

10.1155/2018/6576397 ◽

2018 ◽

Vol 2018 ◽

pp. 1-4

Author(s):

Adel Abdallah

Keyword(s):

Experimental Study ◽

Relative Phase ◽

Fiber Optic ◽

Photonic Bandgap ◽

Single Mode ◽

Hollow Core ◽

Photonic Bandgap Fiber ◽

Photonic Bandgap Fibers ◽

Relative Phase Shift ◽

Phase Generated Carrier

An experiment is proposed to show the feasibility of using hollow-core photonic bandgap fibers (HC-PBF) in the fiber-optic interferometric stethoscopes to generally improve the sensitivity and overcome the problems associated with the electronic stethoscopes. In the experiment, the HC-1550 is used as a measuring arm of an unbalanced Mach-Zehnder interferometer (MZI) and the conventional single-mode optical fiber (SMF) is used as an isolated reference arm. Detection and demodulation of the relative phase shift is performed passively using phase-generated carrier homodyne technique (PGC). The proposed results indicate the significance of using HC-PBFs in the future stethoscopes.

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Experimental study of reinforced concrete pile caps with external, embedded and partially embedded socket with smooth interface

Revista IBRACON de Estruturas e Materiais ◽

10.1590/s1983-41952013000500004 ◽

2013 ◽

Vol 6 (5) ◽

pp. 737-750

Author(s):

R. Barros ◽

J.S. Giongo

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Ultimate Load ◽

Reference Model ◽

Precast Concrete ◽

Smooth Interface ◽

Pile Cap ◽

Pile Caps ◽

Monolithic Connections ◽

Scaled Models

On Precast concrete structures the column foundation connections can occur through the socket foundation, which can be embedded, partially embedded or external, with socket walls over the pile caps. This paper presents an experimental study about two pile caps reinforced concrete with external, partially embedded and embedded socket submitted to central load, using 1:2 scaled models. In the analyzed models, the smooth interface between the socket walls and column was considered. The results are compared to a reference model that presents monolithic connections between the column and pile cap. It is observed that the ultimate load of pile cap with external sockets has the same magnitude as the reference pile cap, but the ultimate load of models with partially embedded and embedded socket present less magnitude than the reference model.

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Experimental Study on Existing Reinforced Concrete Frames Strengthened by L-type Precast Concrete Wall Panels to Earthquake-Proof Buildings

KSCE Journal of Civil Engineering ◽

10.1007/s12205-018-1197-x ◽

2018 ◽

Vol 22 (9) ◽

pp. 3579-3591 ◽

Cited By ~ 4

Author(s):

Soo Kyoung Ha ◽

Sung Yong Yu ◽

Jae Suk Kim

Keyword(s):

Experimental Study ◽

Reinforced Concrete ◽

Precast Concrete ◽

Concrete Frames ◽

Concrete Wall ◽

Reinforced Concrete Frames ◽

Wall Panels

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COMPARATIVE ANALYSIS OF PRECAST CONCRETE FLOOR SLAB WITH CAST IN SITU AND STRUCTURE STABILITY OF GKB UPN "VETERAN" EAST JAVA

CI-TECH ◽

10.33005/ci-tech.v1i01.11 ◽

2020 ◽

Vol 1 (01) ◽

pp. 7-15

Author(s):

CI-TECH UPNJATIM ◽

Alma Christine Puspasari Rumaseb ◽

Made Dharma Astawa ◽

Sumaidi

Keyword(s):

Bending Strength ◽

Damage Control ◽

Precast Concrete ◽

Pushover Analysis ◽

Construction Materials ◽

Tectonic Activity ◽

Structure Stability ◽

Hollow Core ◽

Steel Deck

Gedung Kuliah Bersama was modified into ten floors, constructed using precast pretension slabs, namely hollow core slabs on the second to five floors and cast in situ slabs, namely steel deck on floors six to ten. Gedung Kuliah Bersama is located at the UPN “Veteran” East Java in the city of Surabaya. Geologically and tectonically, Surabaya City is in an active fault zone, so that the tectonic activity that occurs can cause damage to building structures and construction materials. Pushover analysis is an analysis that can be used to determine the pattern of structural collapse when an earthquake occurs. Based on the results of the analysis, precast pretension slabs (hollow core slabs) with segments of 1500 mm × 7000 mm × 150 mm with PC Wire reinforcement ϕ7-121 mm and cast in situ (steel deck) slabs with a thickness of 120 mm with wiremesh reinforcement M8-150 mm. The difference in the bending strength of the two types of slabs is 38.73%. The results of the pushover analysis show that the structural performance at the Damage Control (DO) level shows that the building is able to withstand the earthquake that occurs and the risk of casualties is very small.

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