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Slope Stability Analysis - A basic approach to find cutting points of strips with profile and slip circle - Messages

#1 Posted: 9/16/2023 5:01:44 AM
NDTM Amarasekera

NDTM Amarasekera

130 likes in 352 posts.

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Ref: Example 12.2 (Page 296) - Soil Mechanics : Principles and Practice by G.E. Barnes.

The attached SM file demonstrates how to find cutting points of strips with the slope profile and slip circle.
(for an assumed strip width of 1m. which can be changed if necessary).

Slip_Circle_Barnes-Ex 12.2-TO FORUM.pdf (238 KiB) downloaded 81 time(s).
Slip_Circle_Barnes-Ex 12.2-TO FORUM.sm (320 KiB) downloaded 64 time(s).
Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka
2 users liked this post
sergio 9/16/2023 6:05:00 AM, Dionysios J. Pantazis 10/31/2023 2:31:00 AM
#2 Posted: 9/16/2023 7:51:13 AM
NDTM Amarasekera

NDTM Amarasekera

130 likes in 352 posts.

Group: User

A small text correction to my post #1.
Sorry for inconvenience please.

Point A and Toe are also same.

Slip_Circle_Barnes-Ex 12.2-Text Correction.png
Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka
2 users liked this post
Alvaro Diaz Falconi 9/17/2023 5:18:00 PM, Oscar Campo 9/16/2023 10:55:00 AM
#3 Posted: 9/16/2023 1:06:16 PM
NDTM Amarasekera

NDTM Amarasekera

130 likes in 352 posts.

Group: User

Hi,
Second correction, as the variable Hvc is no longer used in the entire program. Please delete the entire line as indicated.
Extremely sorry.

Slip_Circle_Barnes-Ex 12.2-Correction2.png
Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka
#4 Posted: 9/20/2023 1:55:02 AM
NDTM Amarasekera

NDTM Amarasekera

130 likes in 352 posts.

Group: User

Hi,

The complete solution to Slope Stability Analysis of above example.
Analysis is carried out in 2 parts.

1. With one assumed Center of a slip circle to explain steps involved and resulting cordinates of strips etc., and checked with ACAD drawing.

2. Program to find the minimum factor of safety using multiple arrays of centers.

Slip_Circle_Barnes-Ex 12.2-Min FS-R8-CORRECT-FINAL-R4.pdf (334 KiB) downloaded 61 time(s).

Slip_Circle_Barnes-Ex 12.2-Min FS-R8-CORRECT-FINAL-R4.sm (522 KiB) downloaded 45 time(s).
Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka
3 users liked this post
Alvaro Diaz Falconi 9/20/2023 1:14:00 PM, Oscar Campo 9/20/2023 6:39:00 AM, ioan92 9/20/2023 8:01:00 AM
#5 Posted: 9/21/2023 7:45:50 AM
NDTM Amarasekera

NDTM Amarasekera

130 likes in 352 posts.

Group: User

Hi,

Please make the correction as shown ( replace A with -A in page 3).
Even without this correction, the program will run in most cases, but will give
wrong values for AA for some center cordinates.

This correction is an improvement.
Sorry for the inconvenience.

Correction.png
Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka
1 users liked this post
Oscar Campo 9/21/2023 1:47:00 PM
#6 Posted: 10/28/2023 9:32:18 PM
NDTM Amarasekera

NDTM Amarasekera

130 likes in 352 posts.

Group: User

An improved method to my post #5.
I get Wrong Values OR Errors when using the "Findroot()" function for some center cordinates.

This new method mainly uses "root()" function, with few supporting programs.

Slip Circle Intersection Points - TO FORUM.pdf (392 KiB) downloaded 71 time(s).
Slip Circle Intersection Points - TO FORUM.sm (247 KiB) downloaded 56 time(s).
Look within!... The secret is inside you. Best Regards Eng. NDTM Amarasekera - Sri Lanka
3 users liked this post
Oscar Campo 10/28/2023 10:03:00 PM, Alvaro Diaz Falconi 10/29/2023 3:11:00 AM, sergio 10/30/2023 3:59:00 PM
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