Case Study: How Close Are We To Reality?
Modelling using Midas GTS NX - how close are we to reality? – Sharing of two project applications
Project application 1: Concrete infilled steel pipe pile – load-settlement curve
Project application 2: Failure of a RC pile supported RC wall in soft clay
The finite element is sought after by practicing engineers to solve unconventional problems. In bridge foundation design, structural engineers may want to increase the rigidity of the steel pipe pile by infilling the steel pipe pile. This is unconventional to the typical steel pipe pile analysis. Midas GTS NX was employed to simulate the load-settlement curve of the concrete infilled steel pipe pile and typical steel pipe pile. On the second project application, leakage from the swimming pool built on the RC wall has caused the water to build up behind the RC wall and subsequently triggered the failure. Midas GTS NX was employed to uncover the whole failure mechanism.
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00:00 Introduction
00:56 Contents
02:18 Part 1.Numerical Modeling of Steel Pipe Pile (with and without Concrete infill).
Compare against MLT results
02:29 Location of Bridge
03:02 Details of Pile group
03:24 Sub Soil Condition
04:29 Details of concrete infill
05:19 Installation of Steel pipe pile
05:25 Maintained load test
05:33Finite Element Mesh
07:33 Steel pipe Pile-soil interface
08:27 Field Test Results (SPT N Values)
09:38 Construction Stage
10:08 Results
15:27 Evolution of Loads in Concrete Infilled Steel Pipe Pile
16:23 Sketch of Inferred Load Transfer Mechanism
17:02 Part 2. Failure of Reinforced Concrete Pile Supported Reinforced Concrete Wall in Soft Clay
17:18 Chronological Event of The Failure
18:05 Photographs of The Failure
18:46 Survey Layout Plan
19:09 Cross Section
19:56 Absence of Drainage Layer
20:22 SWCC for Fill
21:25 Failure Mechanism
21:48 Not a Global Failure
23:01 Failure Mechanism
23:41 Fully Coupled Seepage Stress Analysis
24:24 Soil Parameters
24:53 Construction Stages
26:10 Results
32:12 Mendel’s Effect
33:39 Conclusion