2 edition of Tests of reinforced concrete slabs subjected to concentrated loads found in the catalog.
Tests of reinforced concrete slabs subjected to concentrated loads
Frank E. Richart
Published
1939
by University of Illinois in Urbana
.
Written in
Edition Notes
| Statement | by Frank E. Richart and Ralph W. Kluge. |
| Series | Bulletin / University of Illinois Engineering Experiment Station -- no.314, Bulletin (University of Illinois. Engineering Experiment Station) -- no.314. |
| Contributions | Kluge, Ralph W., University of Illinois. Engineering Experiment Station., United States. Bureau of Public Roads., Illinois. Division of Highways. |
| The Physical Object | |
|---|---|
| Pagination | 78p. : |
| Number of Pages | 78 |
| ID Numbers | |
| Open Library | OL20307541M |
of the floor slab subjected to line and point loads. 2. Load distribution factors by finite element method In general, the amount of load distribution for hollow core units under concentrated load or linear line loads can be calcu-lated on the basis of assumption that joints cannot transmit bend-ing moment but can transmit shear forces. Reinforced Concrete Practice Test 1. girders, or slabs supported by columns or walls shall not be cast or erected until concrete in the vertical support members is no longer plastic. shores, and reshoring, sufficient strength shall be demonstrated by _____ _____ considering proposed loads, strength of forming and shoring system, and.
Reinforced concrete slabs without shear reinforcement under concentrated loads near linear supports are typical cases of bridge deck slabs, transfer slabs or pile caps. Such members are often designed or assessed in shear/punching shear with code provisions calibrated on the basis of tests on beams or one-way slabs loaded over the full width, as well as tests on isolated flat slab elements. a slab, supported by ground, whose main purpose is to support the applied loads by bearing on the ground. The slab may be of uniform or variable thickness, and it may include stiffening elements such as ribs or beams. The slab may be unreinforced, reinforced, or post-tensioned concrete. The reinforcement steel may be provided to limit the crack.
Shear tests of reinforced concrete slabs and slab strips under concentrated loads. Title Date. Abstract. In slabs subjected to concentrated loads, the shear strength checks are conducted for two limit states: 1) shear over an effective width, and 2) punching shear on a perimeter around the point load. In current practice, the. Eleven bamboo-reinforced concrete two-way slabs with simply supported boundaries have been subjected to concentrated central loading. Concrete strength, span/depth ratio, bamboo percentage, and the treatment given to the bamboo reinforcement, were varied. Punching failure always followed the full development of the flexural collapse mechanism, and the punching load was always greater than .
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A comprehensive database of experimental values of reinforced concrete slabs subjected to concentrated loads was established by Reißen in This database was extended by results of the slab tests from the TUHH as mentioned in Section 3 and utilized to statistically evaluate a modified design : Lukas Henze, Günter Axel Rombach, Maike Harter.
Get this from a library. Tests of reinforced concrete slabs subjected to concentrated loads; a report of an investigation. [Frank Erwin Richart; Ralph Wendel Kluge; Illinois. Division of Highways.; United States. Bureau of Public Roads.].
A test series of 14 large-scale cantilever slabs subjected to concentrated loads was conducted and analysed at the Hamburg University of Technology. Varying the distance between the concentrated load and the support in a previously unexamined wide range led to new considerations regarding the shear capacity in RC : Lukas Henze, Günter Axel Rombach, Maike Harter.
Limit Design of Slabs for Concentrated Loads. Yield Line Theory is used to derive expressions for the flexural limit loads of reinforced concrete slabs subjected to simultaneously acting concentrated and distributed loads. The concentrated loads are assumed to have a rectangular footprint of any reasonable size and aspect ratio.
The slab reinforcement can be orthotropic, different over each Cited by: 5. An experimental test program has provided the basis for the mechanical model presented here to estimate the punching resistance of axisymmetric reinforced concrete slabs subjected to concentrated loads or by: Because concrete floor slabs are rigid, concentrated loads from forklift wheels or rack posts are spread over a larger area of sub-grade which results in lower pressures than the slab surface is exposed to.
Therefore, concrete floors do not necessarily require strong support from the. The paper presents results from an extensive testing programme involving a total of 30 reinforced concrete (R/C) slabs with and without shear reinforcement, subjected to a concentrated load in the middle.
Shear reinforcement consists of either bent-up bars or closed stirrups. Reinforced slab. Concrete slab rest ing on grade cont aining steel reinforcement which consists of either a welded wire fabric or deformed reinforcing steel bars.
Basic considerations. Concrete floor slabs on grade are subjected to a varie ty of loads and loading conditions. The design procedure includes determini ng slab thickness based. practice. An example is the shear capacity of existing reinforced concrete solid slab bridges, subjected to concentrated live loads when located close to the support, resulting in large shear stresses at the support [7].
The available code provisions are not fully suitable to determine the shear capacity of slabs subjected to concentrated loads. Online Concrete Slab on Grade Analysis Calculator For Slab Subjected to Interior Concentrated Post or Wheel Loading Assuming Slab is Reinforced for Shrinkage and Temperature Only.
Calculators for structural engineers, construction professionals and steel building specifiers. The “Slab on Grade” worksheet assumes a structurally unreinforced slab, ACI″Type B”, reinforced only for shrinkage and interior load condition is assumed for flexural is, the concentrated post or wheel load is assumed to be well away from a “free” slab edge or original theory and equations.
The test parameters investigated were (1) reinforcement type (BFRP and steel); (2) BFRP bar size (12 and 16 mm); (3) reinforcement ratio in each direction (–%); and (4) edge-restraining [restrained or unrestrained (free)].The slabs were tested up to failure over a center-to-center span of 2, mm under a single concentrated load acting.
Reinforced slab. Concrete slab resting on grade containing steel reinforcement which consists of either a welded wire fabric or deformed reinforcing steel bars. Basic considerations. Concrete floor slabs on grade are subjected to a variety of loads and loading conditions. The design procedure includes determining slab thickness based.
Concentrated load tests on three one-way reinforced concrete slabs are described. The experimentally measured bar forces are compared with the. Shearing Strength of Reinforced Concrete Slabs. Based on evaluation of tests made by TS, and R and TAD, (see Engineering Index p ) criteria for ultimate shearing strength of reinforced concrete slabs and footings subjected to concentrated loads.
I have to check if a 4" thick, unreinforced slab on grade will handle lb. concentrated load. My first instinct is to determine the required bearing area based on the soil bearing capacity. Then, analyze that area of concrete as a column footing.
James G MacGregor's book "Reinforced Concrete" contains a section on Yield Line Theory for slabs. One part of the section addresses analysis and design for concentrated loads.
I have used it from time to time for heavy concentrated loads in industrial facilities. Good luck. For reinforced concrete (RC) slabs without shear reinforcement, shear and punching can be the governing failure mode at the ultimate limit state if subjected to large concentrated loads.
Strengthening and Rehabilitation of Existing Reinforced Concrete Structures Diaphragms, Drag Struts, and Chords One-Way Slabs Subjected to Concentrated Loads Load Testing of Structures Closure or Pour Strips in Reinforced Concrete Floors Fire Resistance of Concrete Structural Elements The shear problem is typically studied by testing small, heavily reinforced, slender beams subjected to concentrated loads, resulting in a beam shear failure, or by testing slab-column connections, resulting in a punching shear failure.
Punching shear strength of reinforced concrete flat slabs subjected to fire on their tension sides 45 Author's personal copy [11] P.D. Morley, R. Royles, Response of the bond in reinforced.Hence, there is a reduction of ultimate load capacity of the structure below the flexural capacity by the action of shear.
But when compared to beam shear, the punching shear is less critical. In slabs, the punching shear occurs when they are subjected to high values of concentrated loads.A concrete slab is a common structural element of modern buildings, consisting of a flat, horizontal surface made of cast concrete.
Steel-reinforced slabs, typically between and mm thick, are most often used to construct floors and ceilings, while thinner mud slabs may be used for exterior paving (see below).In many domestic and industrial buildings, a thick concrete slab supported on.
