CivPy

About

This package provides civil engineering tools and algorithms for creating survey and structure models in Python.

Installation

The development version of this package may be installed via pip:

pip install git+https://github.com/mpewsey/civpy#egg=civpy

Table of Contents

Math (civpy.math)

Contains math functions.

Linear Algebra

projection_angles(name)	Returns the rotation angles for the specified projection.
rotation_matrix2(angle)	Returns the 2D rotation matrix.
rotation_matrix3([angle_x, angle_y, angle_z])	Returns the 3D rotation matrix.
rotate2(x, angle[, origin])	Rotates the input 2D vectors by the specified angle.
rotate3(x[, angle_x, angle_y, angle_z, origin])	Rotates the input 3D vectors by the specified angles.

Optimization

fsolve(\*args, \*\*kwargs)

Finds the roots of a function.

Structures (civpy.structures)

Contains components for performing structural analysis.

Components

CrossSection(name, area[, width, height, …])	A class representing a member cross section.
Material(name, elasticity[, rigidity])	A class representing an engineered material.
ElementGroup(name, section, material)	A class representing a group of element properties.
Node	A class representing a structural node.
Element(name, inode, jnode, group[, …])	A class representing a structural element.
Structure(name, nodes, elements[, symmetry])	A class representing a structure.

Loads

LoadCase(name[, node_loads, elem_loads])	A class representing a structural load case.
NodeLoad	A class representing a load applied to a node.
ElementLoad	A class representing an element load.

Element Functions

rotation_matrix(dx, dy, dz[, roll])	Returns the rotation matrix of shape (3, 3) for an element.
transformation_matrix(dx, dy, dz[, roll])	Returns the transformation matrix of shape (12, 12) for an element.
local_stiffness(l, lu, a, ix, iy, j, e, g[, …])	Returns the local stiffness matrix of shape (12, 12) of the element.
clear_element_cache()	Clears the element function cache.

Element Load Functions

load_distances(dx, dy, dz, ix, delx)	Returns the load distances to where an element load is applied.
force_local_reactions(fx, fy, fz, dx, dy, …)	Returns the local force reaction vector for an element.
moment_local_reactions(mx, my, mz, dx, dy, …)	Returns the local moment reaction vector for an element.
local_reactions(fx, fy, fz, mx, my, mz, dx, …)	Returns the local reaction vector for an element.
clear_element_load_cache()	Clears the element load function cache.

Survey (civpy.survey)

Contains functions for modeling alignments and performing spatial queries.

Spatial Models

SpatialHash(points, grid)	A class representing a spatial hash structure for efficient distance queries.
SurveyPoint	A class representing a survey point.
TIN(name[, points, breaklines, max_edge, …])	A class for creating triangulated irregular networks (TIN) models for 3D surfaces.

(Source code)

Alignment

PI	A class representing a point of intersection (PI) of an alignment.
SurveyStake	A class representing a survey stake.
Alignment(name[, pis, stakes, grid, …])	A class representing a survey alignment.

(Source code)