Compared to section design methods, stm design is more. Lpile solves the differential equation for a beamcolumn using a finite difference approach. In the first case, the pile cap is handled as an inverted beam and designed like a beam for bending and shear. Critical designload combinations of the coexistent permanent and transient loads applied at the underside of the pile cap and the centroid of the pile group, relative to a defined system of axes, as shown in figure 5. Structure of the guide introduction to pile foundations pile foundation design load on piles. This video demonstrates the tekla tedds rc pile cap design calculation to the eurocode. Design example of pile cap for concentric loading civil. Once calculation the bending moment the pile cap depth can be determined as. Pile cap design for piles according to aci 31808 spreadsheet. Piles are long and slender members which transfer the.
Analysis of the problem yields deflections, rotations, moments, shears, and soil reactions as required for structural design. The pile cap should be primarily designed considering the punching shear, for. Pile caps can be designed using the truss analogy or using the bending theories. Instructional materials complementing fema p751, design examples. However, if you have layouts that dont match you can create them as pile supported mat slab foundations which are analyzed based on an fem solution. Save as the safe f2k file generated as previously created to begin the modeling. Madam plz send this pile cap and water tank pdf to my mail. Used in conjunction with building design suite, masterkey. Bored pile and pile cap design free download as powerpoint presentation. The pile cap should normally be rigid so as to distribute the forces equally on. Implementation of aashto lrfd bridge design specification. It is carried with a view to determine ultimate load capacity and the safe load capacity. The latter source is usually the only reliable one. Reinforced pile cap design, in accordance with bs8110.
Structural design of reinforced concrete pile caps. It was chosen since it is one of only two caps that are uniquely detailed for round columns rather than equivalent square columns. Pile cap design provides advanced analysis, design, detailing and scheduling of pile caps, with up to 9 piles supporting circular or rectangular columns. The pile cap has normalweight concrete with a compressive strength of 4000 psi and grade 60 reinforcement. After selection of a pile cap type, the program offers a range of reinforcement solutions with the optimum offered as default. Our pile cap analysis programs for structural engineering provide a useful tool for firms across the country. Introduction loads pile cap behavior dimensioning and detailing pile caps pile cap design for gravity loads pile cap design for lateral loads seismic design of pile caps design examples tabulated designs selected references notation tables appendix a derivations and proofs appendix b columntopile cap connections appendix c piletopile cap connections this. A pile cap is a thick concrete mat that rests on concrete or timber piles that have been driven into the soft or unstable soil to provide a suitable and stable foundation. Complete with functions that are easy to learn, and easily implemented capabilities, our pile cap design software programs allow for the creation of easily understandable and professional. Raft is the same structure to a pile cap and it is a concrete foundation floor supported with soft soil that is accountable for subsidence.
Grade of concrete m 30 grade of steel fe 500 size of column 680 x 300 mm axial force 1560 kn moment mx 339 knm moment mz 0. Design and reanalysis of pile cap under eccentricity. Using the pile caps module, cypecad and cype 3d can design foundations resolved using piles with their respective pile caps. The column is reinforced with longitudinal bars of 12 no. Geotechnical design tools for soilstructure interaction problems such as pile groups, laterally loaded piles, nonlinear py curve generation and rock socket design. A pile cap have to support a 18x18 column which is subjected to live load170 kips and dead load160 kips under service loading. Pca predicted that the considered pile cap collapsed because of. The calculation checks the design of pile caps supporting a single column with. This design example is for end bearing piles that are driven through cohesive soil and tipped out in rock.
Results are compared to section design proceedings per aci 31899. Appendix b columntopile cap connections appendix c piletopile cap connections this design guide has been developed to provide the practicing engineer with a detailed overview of pile cap design, detailing, and analysis methodologies that represent the current state of practice in the industry. Download pile cap designing excel excelsheet for pile cap. Design of pile cap part 12 limit state method youtube. Pile spacing, edge distance, and pile cap thickness. Any configuration of up to 200 piles may be analyzed for both axial and biaxial bending moments. Find, read and cite all the research you need on researchgate.
Modeling of pile cap in safe is then ready once you completed the designation of which types of pile cap to use in your foundation design. Instructional materials complementing fema p751, design examples pilepier foundations view of cap with column above and piles below foundation design 29 passive resistance see figure 4. Kindly bear in mind that at the end of the day, it is always the structural engineers decision and judgment will still follow depending on your guts and prerogative, but at least the above basic knowledge can help you dig in and explore pile cap designing. Essentially, it has a library of predefined pile caps based on the layouts from the crsi manual on pile caps. Bored pile and pile cap design deep foundation truss. A similar structure to a pile cap is a raft, which is a concrete foundation floor resting directly onto soft soil which may be liable to subsidence.
Design the pile cap shown in the following figure with 12 in. The ultimate pile capacity70 kippile and service load capacity42 kippile as conformed by testing. Pile cap design software structural engineering general. Cads rc pile cap designer automatically produces a selection of suitable designs to bs 8110 and ec2 for pile caps with 29 piles supporting circular or rectangular columns. Sachpazis 100820 date appd by date rc pile cap design bs8110. Thus, designs are based on the procedure for slender footings that can be divided into three separate steps. The column or wall on pile cap should be centered at the geometric center of the pile cap in order to transferred load evenly to each pile. Masterseries pile cap design using strut and tie methodology. A comprehensive lrfd design example problem is presented and solved to demonstrate the development and application of design charts using both static and field analysis methods. The load of the building is transmitted by the cast concrete pile cap into the piles. The axial loads on the column are due to dead and live loads and. Lateral load capacity of piles transportation research board.
It is common to allow for an amount of corrosion in design by simply over dimensioning the crosssectional area of the steel pile. Design and construction of driven pile foundations volume i fhwa. The examples give in 2 illustrates use stms for design of pile cap. Pile cap design analysis software programs for structural. For pile cap design, two methods are commonly used. These recommendations also deal with categorisation of piling systems. The design of these pile caps will be per standard closed form design procedures. Pile supported foundation pile cap analysis and design. This software is not a part of the ses or utility library bundle. The above design assumptions and recommendations are considered as guidelines in considering pile cap as your choice of foundation. Lpile is a specialpurpose and internationally recognized computer program based on rational procedures for analyzing a pile under lateral loading using the py method. Pile design software pile group analysis py curves. Equations derived considering the strut and tie model are available to calculate the area of.
Pile cap modeling and design parameters assignment. The software offers a range of pile cap group solutions for the input loads. Design guide for pile caps crsi resource materials. Limit state method i suggest you to listen to the video lecture and make notes of your own, that makes you confident if you still want to download it, its not free please click the below link. The cast concrete pile cap distributes the load of the building into the piles. Pile design software, pile group analysis, laterally loaded piles, py curves, free download and rock socket. Unfortunately, a structural designer is not always free in this choice, because piles of. The data required for the analysis and design of the proposed scheme and for future record purposes includes the following. A pile cap is defined as a concrete block cast on the head of a group of piles, to transmit the load from the structure to the group of piles.
The ultimate pile capacity70 kip pile and service load capacity42 kip pile as conformed by testing. How to design pile caps in safe the structural world. In general, piles should be spacing at 3 times of pile diameter in order to transfer load effectively to. Each pile cap may hold one or several columns, shear walls or walls, their arrangement left to the users choice. The second part is testing the design under eccentric load and obtaining the maximum. The design moment and reaction for monolithic support should generally be taken as the greater of the elastic and redistributed values critical design moment usually at face of support.
The program computes deflection, bending moment, shear force and soil response. Analyze any pile arrangement and design the pile cap accordingly, including cap thickness, steel requirements, and rebar spacing. Settle number of pile placement of pile cap and plane dimension pile cap elementary depth verify forces. The design and construction of piled foundations is based on eurocode 7 and din 1054 edition 2010 as well as the european construction codes din en 1536 bored piles, din en 12699 displacement piles and din en 14199 micropiles. This design example presents the procedures to calculate pile. As per is 2911 part i sec 3 2010, the pile cap may be designed by assuming. Design methods aci building code the aci building code aci318 does not contain any provisions specifically for deep pile caps. Pile cap design allows you to interactively design the pile caps by integrating directly with the 3d structural model. A reinforced concrete slab or block which interconnects a group of piles and acts as a medium to transmit the load from wall or column to the piles is called a pile cap.
1208 341 856 622 552 1023 1293 98 1537 1440 1191 226 773 198 812 1032 405 1293 143 1520 933 727 335 428 1465 960 382 835 881 56 685 406 386 1118 51