Structural Engineering Tools

Description

A structural/civil engineering tools python module. It contains structural/civil engineering-specific tools along with miscellaneous utilities for working with engineering data sets.

Installation

pip install engtools

Feature Highlights

Bar class

This class represents a piece of rebar, and has attributes that store its properties like diameter, area, weight, etc. It also has attributes and modules that contain bend radii, bend extensions, and development and splice lengths from AASHTO code equations. There is also a rebar function that outputs a formatted rebar table.

Example

>>> b5 = Bar(5)
>>> b5.dia
0.625
>>> b5.area
0.31
>>> b5.dev(fc=4)
45.0
>>> rebar()
+----------+--------------+-------------+-------------+
| Bar Size | Diameter, in | Area, sq in | Weight, plf |
+----------+--------------+-------------+-------------+
|    3     |    0.375     |     0.11    |    0.376    |
|    4     |     0.5      |     0.2     |    0.668    |
|    5     |    0.625     |     0.31    |    1.044    |
|    6     |     0.75     |     0.44    |    1.503    |
|    7     |    0.875     |     0.6     |    2.046    |
|    8     |      1       |     0.79    |    2.673    |
|    9     |    1.128     |      1      |     3.4     |
|    10    |     1.27     |     1.27    |    4.311    |
|    11    |     1.41     |     1.56    |    5.313    |
|    14    |    1.693     |     2.25    |     7.66    |
|    18    |    2.257     |      4      |    13.614   |
+----------+--------------+-------------+-------------+

Shape classes

Rectangle, Cirle, and Tube shapes that have attributes and methods defining their properties like area, moment of inertia (i), section modulus (s), and radius of gyration (rg).

Example

>>> r = Rectangle(10,12)
>>> r.area
120
>>> r.i
1440.0
>>> r.s
240.0
>>> r.rg
3.4641016151377544

feetdisp function

Takes a decimal value in feet and prints a feet-inches representation with user specified precision (default 1/8 inch).

Example

>>> feetdisp(num)
4'-4 5/8"
>>> feetdisp(num, precision=2)
4'-4 1/2"

Miscellaneous utilities highlights

• sigfigs(num, n) Converts num to a float with n significant figures
• cent_grav(areas, ybars) Calculates the center of gravity of something given areas (or weights) and centers of individual pieces
• sind, cosd, tand, asind, etc. - Trig functions for degrees
• spaces(x, spa) Returns an array of x divided into spa spaces
• sumlist(x) Returns running sum of a list. Basically an alias for list(itertools.accumulate(x))
• shift_list(l, x) and scale_list(l, x) Shift/scale list l by x