ETL 1110-2-344
31 Dec 93
including a detailed fracture mechanics based finite
evaluating the stability and strength of existing
element analysis of a gravity lock monolith with a
CHS. This ETL provides supplemental guidance to
large culvert. Appendix B includes an analysis of
that included in ETL 1110-8-16(FR) for finite ele-
the same monolith with the exception that the cul-
ment modeling and structural evaluation for CHS
vert is excluded. Appendix B is provided to show
using a fracture mechanics based analysis.
the effects that a large void such as a culvert may
have on the analysis. Appendix C provides an
6. Action
example for the monolith of the example provided
in Appendix A with the exception that uplift pres-
sures along the base of the monolith are not
The guidance provided in the enclosures should be
included. Appendix C is provided to compare the
followed when conducting a fracture mechanics
traditional method of analysis with a simplified
based analysis. A fracture mechanics based analy-
fracture mechanics analysis without uplift.
sis should be performed according to the require-
ments of ETL 1110-8-16(FR).
5. Objective
This ETL is the second of a series which will
provide guidance on modern techniques for
FOR THE DIRECTOR OF CIVIL WORKS:
PAUL D. BARBER, PE
3 Appendixes
Chief, Engineering Division
APP A - Fracture Mechanics Based Analysis
Directorate of Civil Works
of a Gravity Lock Monolith
APP B - Analyses With No Culvert
APP C - Analyses With No Uplift
2
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