STRUCTURAL PERFORMANCE OF DAMAGED OPEN-WEB TYPE SRC BEAM-COLUMNS WITH BOLT-CONNECTED BATTEN STEEL PLATES AFTER RETROFITTING

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Takahiro Kume ◽  
Takashi Fujinaga ◽  
Yuping Sun
Keyword(s):  
Axial Load ◽  
Steel Plates ◽  
Analytical Models ◽  
Structural Performance ◽  
Test Results ◽  
Beam Columns ◽  
Cyclic Lateral Load ◽  
Load Carrying ◽  
Lower Load ◽  
Constant Axial Load

In this paper, structural performance of damaged SRC beam-columns with open-web type of batten steel plate after retrofitting was investigated. Three open-web type SRC beam-columns with bolt-connected batten steel plates were fabricated and tested under combined constant axial load and cyclic lateral load. At first, each beam-column was　cyclically loaded to the targeted displacement. After the first loading, the test columns were retrofitted and reloaded till large deformation or failure. The damaged portion of each column was retrofitted with the polymer cement mortar and epoxy resin was injected into the cracks. The measured stiffness of retrofitted columns varied between 71.4% and 85.5% of the initial one. And, test results also indicated that the column which experienced the larger displacement and higher axial load showed lower load carrying capacity, but the others showed approximately the same capacities as the initial columns. Numerical analysis was also conducted to explain the retrofitted columns. Analytical results predicted the experimental behavior fairly well, which verifies the validity of the analytical models in low axial load.

Innovative Use of Profiled Steel Plates for Seismic Structural Performance

2005 ◽  
Vol 8 (3) ◽  
pp. 247-257 ◽  
Author(s):  
Y. Fukumoto ◽  
T. Takaku ◽  
T. Aoki ◽  
K. A. S. Susantha
Keyword(s):  
Numerical Analysis ◽  
Seismic Performance ◽  
Structural Design ◽  
Design Method ◽  
Steel Plates ◽  
Structural Performance ◽  
Cyclic Testing ◽  
Beam Columns ◽  
Bridge Bents ◽  
Hot Rolled

This paper presents the innovative use of hot-rolled thickness-tapered mill products, longitudinally profiled (LP) plates, for the seismic performance of bridge bents of single and portal framed piers. The study involves the inelastic cyclic testing and numerical analysis of tested beam-columns and portal frames in order to evaluate the effects of tapering ratios of LP plates, penetration of yielding, and number of locally buckled panels on their structural ductility. A structural design method is proposed for the portal frames having LP panels under cyclic loadings.

Experimental Study on CFRP-Bonded Steel Plates with Thickness Reduction Using Underwater Epoxy

2011 ◽  
Vol 117-119 ◽  
pp. 373-379
Author(s):  
Xiao Chen ◽  
Yasuo Kitane ◽  
Yoshito Itoh
Keyword(s):  
Epoxy Adhesive ◽  
Steel Plates ◽  
Fiber Reinforced Polymer ◽  
Structural Performance ◽  
Carbon Fiber Reinforced Polymer ◽  
Curing Process ◽  
Test Results ◽  
Initial Stiffness ◽  
Reinforced Polymer ◽  
Loading Tests

This paper presents a series of uniaxial loading tests on the thickness-reduced steel plates bonded with carbon fiber reinforced polymer (CFRP) strand sheets using underwater epoxy as adhesive. Four sets of material test are carried out on epoxy coupons at different curing times. Repaired performance of CFRP-bonded steel plates is investigated in terms of initial stiffness, yield strength, and failure mode of the specimens. Test results showed that the structural performance of CFRP-bonded steel plates does not reach the expected design level due to a slow curing process of epoxy adhesive in this study. The curing effects of epoxy adhesive on the repaired performance are discussed.

scholarly journals Structural Performance of a Precast Concrete Modular Beam Using Bolted Connecting Plates

2021 ◽  
Vol 11 (24) ◽  
pp. 12110
Author(s):  
Kyong Min Ro ◽  
Min Sook Kim ◽  
Chang Geun Cho ◽  
Young Hak Lee
Keyword(s):  
Precast Concrete ◽  
Steel Plates ◽  
Structural Performance ◽  
Modular System ◽  
Beam Specimen ◽  
Test Results ◽  
Reinforcing Bars ◽  
Bolted Connection ◽  
Modular Units ◽  
Modular Structures

In modular structures, prefabricated modular units are joined at the construction site. Modular structures must ensure splicing performance by connecting modular units sufficiently. The bolted connection using steel plates may suffer from alignment issues and corrosion problems. In a precast concrete (PC) modular system, there is difficulty grouting the sleeves when splicing reinforcing bars. This study proposed a PC modular beam using a bolted connecting plate to deal with issues in typical steel modules and PC modules. The structural performance was evaluated by flexural and shear tests on two monolithic beams and two proposed PC specimens. The test results showed that the structural performance of the PC modular specimen was 88% of that of the monolithic reinforced concrete (RC) beam specimen and 102% of the strength calculated by ACI 318-19. Therefore, the proposed PC modular system using bolted connecting plates can solve the problems observed in typical steel and PC modules and improve the structural performance.

Flexural Performance of SCS Sandwich Beam with Foamed Concrete

2016 ◽  
Vol 857 ◽  
pp. 119-124
Author(s):  
M. Sivachidambaram ◽  
J. Revathy
Keyword(s):  
Sandwich Beam ◽  
Steel Plates ◽  
Load Carrying Capacity ◽  
Test Results ◽  
Composite Action ◽  
Flexural Performance ◽  
Load Carrying ◽  
Foamed Concrete ◽  
Predicted Values ◽  
Core Concrete

This paper presents the investigation on the flexural performance of steel concrete steel (SCS) sandwich beam comprising of fibre reinforced foamed concrete (FRFC) as a core concrete, sandwiched between the two steel plates. The steel plates were connected by a J-hook shear connector in order to develop a composite action between the plates and core concrete. The light weight foamed concrete having a density ranged from 1400 to 1450 kg/m3. The SCS sandwich beams were tested under a static gradual loading up to failure to examine its flexural behaviour. The test results revealed that the proposed SCS sandwich beam with FRFC increased the load carrying capacity and ductility performance. The finite element based modelling has also been conducted for the corroboration of test results. A reasonably close agreement has been obtained between the experimental results and predicted values.

On the Simplified Analysis of Square Plates With Holes

2011 ◽  
Author(s):  
Graham K. Schleyer ◽  
Nicholas J. Underwood ◽  
Hyung Min Do ◽  
Jeom Kee Paik ◽  
Bong Ju Kim
Keyword(s):  
Complex Problem ◽  
Steel Plates ◽  
Analytical Models ◽  
Load Carrying Capacity ◽  
Transverse Pressure ◽  
Hole Area ◽  
Load Carrying ◽  
Local Stresses ◽  
Pressure Tests ◽  
Ultimate Load Carrying Capacity

This paper reports the development of a simplified energy solution to a complex problem involving large inelastic deformation in thin clamped square ductile plates with a square hole under the action of transverse pressure loading. The work is part of a project to study blast loading of steel plates with penetrations as used for deck plating or bulkheads that may be required to resist loading far in excess of their design limit due to the effects of an accidental explosion. It is important to develop criteria for the ultimate load-carrying capacity of such structures and guidance for the industry. In seeking this goal, the project will utilize experimental methods for conducting 1/8 scaled pulse pressure tests on 0.5 m square plates with a central aperture. The data will be used to help develop both finite element numerical simulations and simplified analytical models. Initial studies show, based on comparisons with previous test data, that acceptable engineering solutions can be achieved with simplified methods provided the user is aware of the limitations of the method. Furthermore, preliminary results suggest no significant reduction in resistance due to the central hole, the load being reduced in proportion to the hole area. Detailed analysis of the local stresses and strains around the hole will be carried out in the next stage of the project.

Round Timber Joints under Tensile Loading Perpendicular to the Grain

2014 ◽  
Vol 1065-1069 ◽  
pp. 1327-1330
Author(s):  
Kristýna Klajmonová ◽  
Antonín Lokaj
Keyword(s):  
Bolted Joints ◽  
Steel Plates ◽  
Truss Structures ◽  
Load Carrying Capacity ◽  
Test Results ◽  
Static Tests ◽  
Load Carrying ◽  
Calculated Load ◽  
Timber Joints ◽  
Round Timber

This paper presents the results of static tests of non-reinforced round timber bolted joints with slotted-in steel plates loaded perpendicular to the grain. This type of joints loading is particularly widespread in truss structures. Round timber test samples series were prepared to validate the behavior of a joint loaded in tension perpendicular to the grain. The joints samples were experimentally tested in the laboratory of the Faculty of Civil Engineering VŠB TU Ostrava. The test results were compared with the calculated load-carrying capacity of joints by Johansen’s yielding theory.

FREE VIBRATION AND BUCKLING OF CANTILEVER BEAMS UNDER LINEARLY VARYING AXIAL LOAD CARRYING AN ECCENTRIC END RIGID BODY

2013 ◽  
Vol 37 (1) ◽  
pp. 89-110 ◽  
Author(s):  
Seyed Amir Mousavi Lajimi ◽  
Glenn R. Heppler
Keyword(s):  
Rigid Body ◽  
Axial Load ◽  
Natural Frequencies ◽  
Analytical Form ◽  
Frequency Equation ◽  
Cantilever Beams ◽  
Distributed Load ◽  
Orthogonality Conditions ◽  
Load Carrying ◽  
Constant Axial Load

Natural frequencies of a clamped axially loaded beam carrying an eccentric end rigid body are computed. A linearly varying non-follower axial force representing the beam’s own weight is taken into consideration. An analytical form of the frequency equation of the structure is obtained and solved numerically. The parameters associated with the end rigid body, the mass, the rotary inertia and the eccentricity, are shown to considerably affect the natural frequencies of the structure. The modified orthogonality conditions of the system are presented. A closed-form of the frequency equation for a beam under constant axial load carrying an eccentric end rigid body is obtained and results are compared with the distributed load case. Based on the exact and approximate computations of the critical buckling load a recommendation is made on the method of including the effect of distributed load for practical purposes.

scholarly journals An experimental study on the structural performance of reinforced concrete low-rise building columns subjected to axial loading

2020 ◽  
Vol 14 (1) ◽  
pp. 103-111
Author(s):  
Pham Xuan Dat ◽  
Nguyen Anh Vu
Keyword(s):  
Reinforced Concrete ◽  
Axial Load ◽  
Load Capacity ◽  
Axial Loading ◽  
Structural Performance ◽  
Building Structures ◽  
Test Results ◽  
Structural Elements ◽  
Axial Load Capacity ◽  
Geometrical Dimensions

It has been commonly recognized by the international research and practice community that the presence of both outer and inner stirrups may significantly enhance the axial load capacity of reinforced concrete (RC) columns. However, there is limited testing evidence to support this conclusion that has been published nationally. This paper reports an experimental programme to study the effectiveness of stirrup detailing on the structural performance of columns having small sectional dimensions that are common in low-rise building structures. Nine column specimens with the same geometrical dimensions of 220 mm x 220 mm x 880 mm in three batches were detailed with different stirrup categories, have been gradually axially loaded to failure. The test data have revealed that although the presence of stirrups can generally enhance the axial load capacity of the column specimens, the enhancing levels are much dependent to the shapes of the stirrups. Selected interesting aspects of the test results have also been discussed, which set a concrete base for recommendations for design and detailing of such vertical structural elements. Keywords: experimental investigation; low-rise building columns; axial load capacity; stirrups.

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