scholarly journals A Simplified Approach for Analysis and Design of Reinforced Concrete Circular Silos and Bunkers

2018 ◽  
Vol 12 (1) ◽  
pp. 234-250
Author(s):  
Muhammad Umair Saleem ◽  
Hassan Khurshid ◽  
Hisham Jahangir Qureshi ◽  
Zahid Ahmad Siddiqi
Keyword(s):  
Reinforced Concrete ◽  
Design Procedure ◽  
Bending Moment ◽  
Efficient Design ◽  
Simplified Approach ◽  
Analysis And Design ◽  
Design Procedures ◽  
Axial Forces ◽  
Design Skills ◽  
Seismic Forces

Background: Reinforced concrete silos and bunkers are commonly used structures for large storage of different materials. These structures are highly vulnerable when subjected to intense seismic forces. Available guidelines for analysis and design of these structures require special design skills and code procedures. Objective: The current study is aimed to elaborate the design procedures from different sources to a unified method, which can be applied to a larger class of reinforced concrete silos. In this study, analysis and design procedures are summarized and presented in a simplified form to make sure the efficient practical design applications of reinforced concrete silos. Method: Four different cases of silo design based on the type and weight of stored material were considered for the study. For each case, the silo was designed using given design procedure and modeled using FEM-based computer package. All of the reinforced concrete silos were subjected to gravity, wind and seismic forces. Results: After performing the analysis and design of different silos, the bending moment, shear force and axial forces profiles were given for a sample silo. The results obtained from the proposed design procedure were compared with FEM values for different components of silos such as slab, wall and hopper. Conclusion: The comparison of tangential and longitudinal forces, bending moments, shear forces and reinforcement ratios of different parts of silos have shown a fair agreement with the FEM model results. It motivates to use the proposed design procedure for an efficient design of reinforced concrete silos.

scholarly journals Structural Analysis and Design of Reinforced Concrete Bridge Corbels

2020 ◽  
Vol 10 (19) ◽  
pp. 6727
Author(s):  
Sara Cattaneo ◽  
Pietro Crespi ◽  
Luigi Biolzi
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Response ◽  
Bending Moment ◽  
Simplified Approach ◽  
Analysis And Design ◽  
Strut And Tie ◽  
Concrete Members ◽  
Pull Out ◽  
Safety Barrier ◽  
Strut And Tie Model

Post-installed systems for the anchorage of safety barriers to bridge corbels are widely used today thanks to their flexibility and easiness of installation. Because of commonly found in situ boundary constraints, however, the design requirements for post-installed fasteners and rebars are frequently not satisfied or only partially satisfied. This paper assesses the mechanical response of a corbel where an innovative solution concerning the placement of post-installed reinforcement in reinforced concrete members was suggested. With reference to the refurbishment of bridge curbs, which usually requires concrete removal in the damaged top layers, the proposed method was based on the introduction of additional U-shaped post-installed rebars connecting the existing portion of the corbel to the newly cast top layer, in order to allow the transfer of the tension pull-out force exerted by the posts restraining the safety barrier. The layout investigated in this paper consisted of three anchors connecting the baseplate of the post supporting the safety barrier to the corbel (a layout commonly found in Italy). These anchors transfer the external actions (bending moment and shear) to the corbel thanks to the formation of a strut-and-tie system where the U-shaped rebars and the existing reinforcement play a crucial role. A strut-and-tie model of the corbel was presented to allow the use of a simplified approach to assess the safety of the corbel. The tests on real-scale specimens were also modeled numerically and additional models were considered to evaluate the effect of characteristics parameters (i.e., size of the corbel, existing shear reinforcement, etc.) on the overall response of the corbel.

The Mechanics Behavior Study of Four-Cell Concrete Rectangle Liquid-Storage Structure under the Thermal Envirement

2010 ◽  
Vol 163-167 ◽  
pp. 1236-1240
Author(s):  
Xuan Sheng Cheng ◽  
Zhi Zhou
Keyword(s):  
Reinforced Concrete ◽  
Simulation Analysis ◽  
Thermal Environment ◽  
Bending Moment ◽  
Fine Aggregate ◽  
Storage Structure ◽  
Analysis And Design ◽  
Liquid Storage ◽  
Behavior Study ◽  
Rectangular Liquid Storage Structure

Reinforced concrete is the current main material to build liquid-storage structure. Because coarse aggregate and fine aggregate have different expansion coefficient under thermal environment, the expansion crack and leakage will happen. it will make liquid-storage structure failure. So thermal effect has become the most important factor that can not be ignored in the structure analysis and design. In this paper, adopting FEM software ANSYS, considering four-cell reinforced concrete rectangular liquid-storage structure at different temperature, heat-solid coupling numerical simulation analysis is proceeded, and the axial (shear) force and bending moment distribution are obtained.

Composite design method for masonry walls on concrete beams

1983 ◽  
Vol 10 (3) ◽  
pp. 337-349 ◽  
Author(s):  
B. Stafford Smith ◽  
L. Pradolin
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Design Method ◽  
Design Procedure ◽  
Bending Moment ◽  
Reinforced Concrete Beam ◽  
Masonry Wall ◽  
Reinforced Concrete Beams ◽  
Steel Beams ◽  
Arch Action

This paper describes a design method for structures consisting of a vertically loaded masonry wall supported by a reinforced concrete beam, taking account of the composite tied-arch action of the wall and beam. Experimental results have shown that the behaviour of walls on reinforced concrete beams is similar enough to that of walls on steel beams to allow the development of a design procedure for the former using similar principles to that for walls on steel beams. Therefore, the design approach is based on the assumption of triangular distributions of vertical stress at the wall–beam interface, where the length of the distributions are a function of the beam-to-wall relative stiffness. In the design method the beam flexural stiffness is designed to give an adequate distribution of the interface stress so that the maximum stress in the wall does not exceed allowable limits. The beam is also designed with flexural and shear reinforcement sufficient to resist the bending moment, tie force, and shear forces applied by the normal and shear interface loading. Experimental evidence as well as analytical results are cited to support the assumptions and the resulting design method.

scholarly journals Statistical analysis of the design procedure used in reinforced concrete pipes

2020 ◽  
Vol 13 (1) ◽  
pp. 69-86
Author(s):  
F. M. FLORESTA ◽  
C. S. VIEIRA ◽  
L. A. MENDES ◽  
D. L. N. F. AMORIM
Keyword(s):  
Reinforced Concrete ◽  
Aspect Ratio ◽  
Structural Design ◽  
Design Procedure ◽  
Design Procedures ◽  
Concrete Pipes ◽  
Actual Behaviour ◽  
Design Values ◽  
Present Aspect ◽  
Internal Forces

Abstract Structural design procedures are based on simplified hypotheses that attempt to approximate the actual behaviour. Depending on the adopted hypothesis, the design procedure may not satisfactorily describe the structural actual behaviour. Such condition occurs in the design of reinforced concrete pipes, where there are uncertainties related especially on the internal forces and the installation type of the pipe. Moreover, the main design hypothesis is that the cross section is plane and perpendicular to the deformed axis. Based on materials resistance principles it is known that this hypothesis is unsatisfactory to pipes with aspect ratio lower than ten. Note that the commercial reinforced concrete pipes usually present aspect ratio well below ten. In the light of the foregoing, the main objective of this paper is to analyse the accuracy of the design procedure for reinforced concrete pipes. Therefore, statistical processes were used to compare design values with experimental results. The comparisons in this paper showed that the design procedure results in oversized pipes.

The 2002 Canadian Geotechnical Colloquium: The role of soil–pile interaction in foundation engineering

2004 ◽  
Vol 41 (3) ◽  
pp. 485-509 ◽  
Author(s):  
M Hesham El Naggar
Keyword(s):  
Foundation Engineering ◽  
Load Testing ◽  
Efficient Design ◽  
Analysis And Design ◽  
Design Procedures ◽  
Reinforced Polymer ◽  
Thin Walled Pipe ◽  
Fibre Reinforced Polymer ◽  
Pile Interaction

Soil–pile interaction (SPI) plays an important role in the analysis and design of foundations and structures. Geotechnical engineers have recognized this role, and many studies have focused on several aspects of the topic in the past four decades. As the third millennium begins, geotechnical engineers are challenged to provide more reliable and efficient foundation solutions to support larger, heavier, and more complicated structures. SPI must be thoroughly understood to properly address the issues that arise when designing foundations to meet these challenges. This presentation investigates some of the important features of SPI as they relate to some innovative applications in foundation engineering. Specific problems examined here include design of tapered piles where understanding SPI and interface conditions is utilized to develop efficient design procedures; construction of fibre-reinforced polymer (FRP) and thin-walled pipe piles using an innovative device that exploits the understanding of aspects of SPI during driving for efficient installation; and Statnamic pile load testing where analysis of SPI is used to establish the characteristics of the pile static behaviour from the dynamic loading event.Key words: tapered, piles, driving, fibre-reinforced polymer, Statnamic, load testing.

scholarly journals Seismic Retrofit of Reinforced Concrete Frame Buildings with Hysteretic Bracing Systems: Design Procedure and Behaviour Factor

2017 ◽  
Vol 2017 ◽  
pp. 1-20 ◽  
Author(s):  
Antonio Di Cesare ◽  
Felice Carlo Ponzo
Keyword(s):  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Passive Control ◽  
Design Procedure ◽  
Systems Design ◽  
Seismic Retrofitting ◽  
Design Parameters ◽  
Reinforced Concrete Frame ◽  
Simplified Approach ◽  
Behaviour Factor

This paper presents a design procedure to evaluate the mechanical characteristics of hysteretic Energy Dissipation Bracing (EDB) systems for seismic retrofitting of existing reinforced concrete framed buildings. The proposed procedure, aiming at controlling the maximum interstorey drifts, imposes a maximum top displacement as function of the seismic demand and, if needed, regularizes the stiffness and strength of the building along its elevation. In order to explain the application of the proposed procedure and its capacity to involve most of the devices in the energy dissipation with similar level of ductility demand, a simple benchmark structure has been studied and nonlinear dynamic analyses have been performed. A further goal of this work is to propose a simplified approach for designing dissipating systems based on linear analysis with the application of a suitable behaviour factor, in order to achieve a widespread adoption of the passive control techniques. At this goal, the increasing of the structural performances due to the addition of an EDB system designed with the above-mentioned procedure has been estimated considering one thousand case studies designed with different combinations of the main design parameters. An analytical formulation of the behaviour factor for braced buildings has been proposed.

scholarly journals Planning Parking Building Using Flat Slab And Drop Panel As A Replacement Conventional Beam With Analyzing Bending Moment Value & Sliding Style Based On SNI 1726-2012

2020 ◽  
Vol 2 (3) ◽  
pp. 1-12
Author(s):  
Agyanata Tua Munthe ◽  
Guntur Jatmiko
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
Bending Moment ◽  
Reinforced Concrete Structure ◽  
Dead Load ◽  
Construction Time ◽  
Flat Slab ◽  
Analysis And Design ◽  
Final Project ◽  
Flat Slabs

The construction of a 5-stored parking building is planned to use a flat slab (with drop panels). Flat slab (with drop panel) is a type of two-way plate without beams that directly rests on the column. the flat slab can reduce the height of the structure and construction time. However, flat slabs require plates that are thicker than usual to overcome deflection and punching shears. In this final project, a 5-story reinforced concrete structure will be reviewed with a span of 8 x 8.3 m. Analysis and design was carried out with the help of the 2016 ETABS program to find the value of intersection between floors, shear moments and forces taking into account the consequences of dead load, super dead load, life, and earthquake (dynamic)

scholarly journals Analysis and Design of Reinforced Concrete Multi-Stored Building (G+5) by using Tekla Software

2021 ◽  
Vol 7 (03) ◽  
pp. 229-244
Keyword(s):  
Reinforced Concrete ◽  
Construction Industry ◽  
Limit State ◽  
Bending Moment ◽  
Wind Loading ◽  
Unit Weight ◽  
Analysis And Design ◽  
Code Of Practice ◽  
Budget Analysis ◽  
Earthquake Load

The rapidly developing world, in construction industry software’s are used today is the urgent necessity of the moment in order to match the peace of infrastructural development. The main objective of the study is checking the computability of results. The analysis and design of Reinforced Concrete structures is a final stage in the construction industry to deliver the projects with in the estimated time and within the budget. Analysis and design tasks is not an easy matter of fact. Especially specialized software’s are used such as Robot structural Analysis, MIDAS Gen, SAP2000, STAAD PRO, ETABS, TEKLA Structural designer, S-Frame and so on. To gain the design results most commonly used software are validated. In manual design process Indian Standard Codes are utilized and different design modules are used to gain the confidence of the users. The basic elements of a RC Structure such as beams, columns and simple frame have been discussed. In analysis process, shear force and bending moment of beams and columns are comparable in all cases. Thereafter the loads are calculated namely the dead loads, which depend on the unit weight of the materials used (concrete, brick), live loads, which according to the code IS 875-1987 and earthquake load according to IS1893 (PART-1). IS 456:2000 code of practice for plain and reinforced concrete and IS 800:2007 limit state design and seismic ductile design IS:13920(2016) and seismic loading IS 1893 (part 1):2016 and wind loading IS875(part 3):1987. Finally, the footings are designed based on loading from the column and the soil bearing capacity for the particular area. Most importantly, the sections must be checked for all the four components with regard to strength and serviceability factors.Construction plays a significant role in the emergence of ecological problems such as environmental pollutions, energy consumption and carbon emission and so on. In the emergence of ecological situations the specific attention has to be devoted and develop the sustainable and green solutions in the design of buildings and structures.

scholarly journals Effects of pounding on the behavior of reinforced concrete frame structures in seismic zone 2B

2021 ◽  
Author(s):  
Muhammad Hamid ◽  
◽  
Fayyaz Ur Rahman ◽  
Qaisar Ali ◽  
◽  
...  
Keyword(s):  
Structural Damage ◽  
Bending Moment ◽  
Frame Structures ◽  
Seismic Zone ◽  
Structural Members ◽  
Reinforced Concrete Frame ◽  
Ground Acceleration ◽  
Maximum Displacement ◽  
Analysis And Design ◽  
Axial Forces

Pounding between adjacent buildings is a common phenomenon which can be observed during moderate to high ground shakings that can result in structural damage and even loss of life. As this phenomenon is related to the life safety, therefore, it is imperative to consider it in the modelling stage of structural analysis and design. The current study is intended to evaluate, numerically, the effect of pounding phenomenon in RC frame structures. Three dimensional models of two hypothetical buildings are analyzed by subjecting to three ground acceleration histories that are scaled and matched with BCP-SP07 design spectrum. The analysis results such as inter storey drift, maximum displacement, pounding forces and its effects on bending moment, axial forces, shear and torsional forces in structural members are compared. The results show that pounding forces decrease with increase in gap size and are dominant in top five stories with maximum force at the top floor level. Pounding increase displacement up to 2 times and acceleration up to 240 times as compared to without pounding case. Pounding increase the axial forces up to 250 times and bending moment up to 2 time in the beams parallel to colliding forces. Similarly, the shear forces and torsional moments are almost doubled as a result of pounding. Finally, a 20 storey building consists of four blocks separated by 3-inch expansion joints is modelled combinedly in Etabs and analyzed to see the effect of pounding. Based on the results it is concluded that pounding must be considered at modelling stage of the design to account for the forces induced in the structural members.

scholarly journals Wind Analysis of Tall Buildings for Vertical Irregularity : A Review

2020 ◽  
pp. 121-126
Author(s):  
Syed Mudassir ◽  
Kuldeep Dabhekar ◽  
Syed Faiz ◽  
Isha P. Khedikar
Keyword(s):  
Tall Buildings ◽  
Bending Moment ◽  
Wind Load ◽  
Base Shear ◽  
Structural Behaviour ◽  
Analysis And Design ◽  
Irregular Structure ◽  
Axial Forces ◽  
Tall Structures ◽  
Wind Analysis

Now every day, various buildings are being built for different purposes such as residential, commercial, and industrial etc. In general, in order to stabilize these longitudinal tall structures for both loads such as gravity and lateral (wind and earthquake) loads are required to take when considering the analysis and design. In addition to this there are several types of structures or buildings having different geometry in vertical and horizontal plan in the sense regular or irregular. This paper presents detailed review on the analysis of vertically irregular structure subjected to wind loads, the failure of structure starts from the weak point or joint. This weakness is exacerbated by the uneven distribution of mass, changes in elasticity or stiffness and also changes in the vertical geometry of the structure. Properties that have objections to physical or geometric regularity are referred to as irregular structures. The present study shows a review on analysis and effects in vertical irregular structure under lateral load especially in case of wind load. Many structural software and standard codes are reviewed for the creation of all members under wind load. At the end of this paper concerns the comparison of regular building with irregular structure and describes the effects in vertical irregular structure with the help of structural behaviour such as displacement, drift, axial forces, base shear and bending moment etc.

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