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a8ced59 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 | classdef RC_SRP_Calculator < handle
% This application provides a modern, peach-themed interface
% to calculate singly reinforced sections step-by-step.
% We avoid heavy plots and focus purely on real-time equation updates.
properties
% Window and main grid
UIFigure
GridLayout
% The three main sections
LeftPanel % Sidebar for configurable settings
CenterPanel % Main panel for step-by-step equations
RightPanel % Right sidebar for our activity log
% Left Panel Inputs (using f(c)', f(y), A(s) etc. for UI labels)
ModeDropdown
TitleFc, FieldFc
TitleFy, FieldFy
TitleB, FieldB
TitleH, FieldH
TitleBars, FieldBars
TitleArea, FieldArea
TitleCover, FieldCover
% Extra Inputs for Double Layer
TitleBars2, FieldBars2
TitleArea2, FieldArea2
TitleSpacing, FieldSpacing
% Center Panel Output
EquationHTML
% Right Panel Output
LogTextArea
% Keep track of our log messages
LogHistory = {}
end
methods (Access = public)
% Constructor. This runs when we launch the calculator.
function app = RC_SRP_Calculator()
app.createApp();
app.addLog('Calculator app initialized! Welcome.');
app.updateEquations(); % trigger first calculation
end
% Clean up when the app is nicely closed
function delete(app)
if isvalid(app.UIFigure)
delete(app.UIFigure);
end
end
end
methods (Access = private)
% Let's build our user interface step-by-step
function createApp(app)
% Define our peach color palette (very warm, minimalistic aesthetic)
peachBase = [1.00, 0.89, 0.80]; % Main background
peachDark = [0.95, 0.76, 0.65]; % Panels
peachLight = [1.00, 0.95, 0.90]; % Highlights
peachText = [0.20, 0.20, 0.20]; % Text color for readability
% Setup the main application window
app.UIFigure = uifigure('Name', 'RC-SRP Calculator', 'Position', [100, 100, 1200, 750]);
app.UIFigure.Color = peachBase;
% Setup a 3-column layout
app.GridLayout = uigridlayout(app.UIFigure);
app.GridLayout.ColumnWidth = {300, '1x', 280};
app.GridLayout.RowHeight = {'1x'};
app.GridLayout.BackgroundColor = peachBase;
% --- 1. LEFT SIDEBAR: Configurable Settings ---
app.LeftPanel = uipanel(app.GridLayout);
app.LeftPanel.Layout.Row = 1;
app.LeftPanel.Layout.Column = 1;
app.LeftPanel.BackgroundColor = peachDark;
app.LeftPanel.Title = 'Configurable Settings';
app.LeftPanel.ForegroundColor = peachText;
app.LeftPanel.FontWeight = 'bold';
% Grid inside the left panel to align our inputs beautifully
leftGrid = uigridlayout(app.LeftPanel);
leftGrid.ColumnWidth = {'1x', '1x'};
leftGrid.RowHeight = repmat({32}, 1, 15); % 15 rows of 32px height
leftGrid.BackgroundColor = peachDark;
% Calculation mode dropdown
uilabel(leftGrid, 'Text', 'Mode:', 'FontWeight', 'bold', 'FontColor', peachText);
app.ModeDropdown = uidropdown(leftGrid, ...
'Items', {'Singly Reinforced', 'Single Layer', 'Double Layer'}, ...
'ValueChangedFcn', @(src, event) app.onInputChanged(), ...
'FontColor', peachText, 'BackgroundColor', peachLight);
% f(c)' input (concrete compressive strength)
app.TitleFc = uilabel(leftGrid, 'Text', 'f(c)'' (psi):', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldFc = uieditfield(leftGrid, 'numeric', 'Value', 4000, 'ValueChangedFcn', @(src, event) app.onInputChanged());
% f(y) input (steel yield strength)
app.TitleFy = uilabel(leftGrid, 'Text', 'f(y) (psi):', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldFy = uieditfield(leftGrid, 'numeric', 'Value', 60000, 'ValueChangedFcn', @(src, event) app.onInputChanged());
% Beam width
app.TitleB = uilabel(leftGrid, 'Text', 'b (in):', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldB = uieditfield(leftGrid, 'numeric', 'Value', 12, 'ValueChangedFcn', @(src, event) app.onInputChanged());
% Beam height
app.TitleH = uilabel(leftGrid, 'Text', 'h (in):', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldH = uieditfield(leftGrid, 'numeric', 'Value', 20, 'ValueChangedFcn', @(src, event) app.onInputChanged());
% Bars configuration
app.TitleBars = uilabel(leftGrid, 'Text', 'Number of Bars:', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldBars = uieditfield(leftGrid, 'numeric', 'Value', 4, 'ValueChangedFcn', @(src, event) app.onInputChanged());
app.TitleArea = uilabel(leftGrid, 'Text', 'Area per A(s):', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldArea = uieditfield(leftGrid, 'numeric', 'Value', 0.79, 'ValueChangedFcn', @(src, event) app.onInputChanged());
app.TitleCover = uilabel(leftGrid, 'Text', 'Cover (in):', 'FontColor', peachText, 'FontWeight', 'bold');
app.FieldCover = uieditfield(leftGrid, 'numeric', 'Value', 2.5, 'ValueChangedFcn', @(src, event) app.onInputChanged());
% Double layer specific fields (hidden by default)
app.TitleBars2 = uilabel(leftGrid, 'Text', 'L2 Bars:', 'FontColor', peachText, 'Visible', 'off');
app.FieldBars2 = uieditfield(leftGrid, 'numeric', 'Value', 2, 'Visible', 'off', 'ValueChangedFcn', @(src, event) app.onInputChanged());
app.TitleArea2 = uilabel(leftGrid, 'Text', 'L2 Area A(s):', 'FontColor', peachText, 'Visible', 'off');
app.FieldArea2 = uieditfield(leftGrid, 'numeric', 'Value', 1.00, 'Visible', 'off', 'ValueChangedFcn', @(src, event) app.onInputChanged());
app.TitleSpacing = uilabel(leftGrid, 'Text', 'Spacing (in):', 'FontColor', peachText, 'Visible', 'off');
app.FieldSpacing = uieditfield(leftGrid, 'numeric', 'Value', 2.13, 'Visible', 'off', 'ValueChangedFcn', @(src, event) app.onInputChanged());
% --- 2. CENTER PANEL: Step-by-Step Equations ---
app.CenterPanel = uipanel(app.GridLayout);
app.CenterPanel.Layout.Row = 1;
app.CenterPanel.Layout.Column = 2;
app.CenterPanel.BackgroundColor = peachLight;
app.CenterPanel.Title = 'Formula & Equations';
app.CenterPanel.ForegroundColor = peachText;
app.CenterPanel.FontWeight = 'bold';
% We use an HTML view to render nice Math/LaTeX-like output with CSS animations
centerGrid = uigridlayout(app.CenterPanel);
centerGrid.ColumnWidth = {'1x'};
centerGrid.RowHeight = {'1x'};
app.EquationHTML = uihtml(centerGrid);
% --- 3. RIGHT SIDEBAR: Activity Log ---
app.RightPanel = uipanel(app.GridLayout);
app.RightPanel.Layout.Row = 1;
app.RightPanel.Layout.Column = 3;
app.RightPanel.BackgroundColor = peachDark;
app.RightPanel.Title = 'Log & Summary';
app.RightPanel.ForegroundColor = peachText;
app.RightPanel.FontWeight = 'bold';
rightGrid = uigridlayout(app.RightPanel);
rightGrid.ColumnWidth = {'1x'};
rightGrid.RowHeight = {'1x'};
app.LogTextArea = uitextarea(rightGrid);
app.LogTextArea.Editable = 'off';
app.LogTextArea.BackgroundColor = peachLight;
app.LogTextArea.FontColor = peachText;
app.LogTextArea.FontName = 'Courier New';
end
% Whenever the user touches a variable, we update instantly
function onInputChanged(app)
% Gently check if we need to show Double Layer inputs
if strcmp(app.ModeDropdown.Value, 'Double Layer')
app.TitleBars2.Visible = 'on'; app.FieldBars2.Visible = 'on';
app.TitleArea2.Visible = 'on'; app.FieldArea2.Visible = 'on';
app.TitleSpacing.Visible = 'on'; app.FieldSpacing.Visible = 'on';
else
app.TitleBars2.Visible = 'off'; app.FieldBars2.Visible = 'off';
app.TitleArea2.Visible = 'off'; app.FieldArea2.Visible = 'off';
app.TitleSpacing.Visible = 'off'; app.FieldSpacing.Visible = 'off';
end
app.addLog('Settings modified, recalculating formulas...');
app.updateEquations();
end
% This is the core logic where all the math happens, gracefully formatting results
function updateEquations(app)
% 1. Grab variables from the visual fields
fc = app.FieldFc.Value;
fy = app.FieldFy.Value;
b = app.FieldB.Value;
h = app.FieldH.Value;
n_bars = app.FieldBars.Value;
a_bar = app.FieldArea.Value;
cover = app.FieldCover.Value;
mode = app.ModeDropdown.Value;
% Convert stress to ksi for smaller, readable numbers
fc_ksi = fc / 1000;
fy_ksi = fy / 1000;
Es_ksi = 29000;
E_cu = 0.003; % standard concrete strain parameter
% 2. Setup our HTML framework with a lovely peach CSS style and transition animations
html = [ ...
'<html><head><style>' ...
'body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; ' ...
'color: #4A3B32; background-color: #FFF2E6; padding: 20px; line-height: 1.6; } ' ...
'h2 { color: #D35400; border-bottom: 2px solid #FAD7A1; padding-bottom: 5px; } ' ...
'h3 { color: #E67E22; margin-top: 25px; } ' ...
'@keyframes popup { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } } ' ...
'.equation { background-color: #FFE6CC; padding: 15px; border-radius: 12px; ' ...
'margin: 12px 0; font-family: "Courier New", Courier, monospace; font-weight: bold; ' ...
'box-shadow: 0 4px 6px rgba(0,0,0,0.06); animation: popup 0.4s ease-out; } ' ...
'.highlight { color: #C0392B; font-size: 1.1em; } ' ...
'.success { color: #27AE60; font-weight: bold; } ' ...
'.danger { color: #E74C3C; font-weight: bold; } ' ...
'</style></head><body>' ...
];
html = [html, '<h2>Analysis Mode: ', mode, '</h2>'];
html = [html, '<h3>Given Variables</h3>'];
html = [html, '<div class="equation">', ...
'f_c'' = ', num2str(fc), ' psi f_y = ', num2str(fy), ' psi<br>', ...
'b = ', num2str(b), ' in h = ', num2str(h), ' in<br>', ...
'Bars = ', num2str(n_bars), ' (A_b = ', num2str(a_bar), ' in²)<br>', ...
'Cover = ', num2str(cover), ' in</div>'];
% 3. Common mathematical terms
% Beta_1 decreases gently for higher strength concrete
beta1 = 0.85;
if fc > 4000
beta1 = 0.85 - 0.05 * ((fc - 4000) / 1000);
end
beta1 = max(beta1, 0.65); % Never drops below this rule
% Steel minimum base requirement
limit_val = 3 * sqrt(fc);
As_min_factor = max(limit_val, 200); % chooses the dominating rule automatically
% 4. Logic splits neatly based on chosen calculation mode
if strcmp(mode, 'Singly Reinforced') || strcmp(mode, 'Single Layer')
% Simple straightforward geometry
d = h - cover;
html = [html, '<h3>1. Solve Effective Depth (d)</h3>'];
html = [html, '<div class="equation">d = h - cover<br>', ...
'= ', num2str(h), ' - ', num2str(cover), '<br>', ...
'= <span class="highlight">', num2str(d), ' in</span></div>'];
As = n_bars * a_bar;
html = [html, '<h3>2. Solve Steel Area (A_s)</h3>'];
html = [html, '<div class="equation">A_s = bars × a_bar<br>', ...
'= ', num2str(n_bars), ' × ', num2str(a_bar), '<br>', ...
'= <span class="highlight">', num2str(As), ' in²</span></div>'];
% Standard assumption: the steel is already yielding
T = As * fy_ksi;
html = [html, '<h3>3. Assume steel yields (T = A_s · f_y)</h3>'];
html = [html, '<div class="equation">T = ', num2str(As), ' × ', num2str(fy_ksi), ' ksi<br>', ...
'= <span class="highlight">', num2str(T), ' kips</span></div>'];
% Concrete compression block depth
a = T / (0.85 * fc_ksi * b);
html = [html, '<h3>4. Solve Compression Block (a & c)</h3>'];
html = [html, 'By matching concrete volume force to tension:<br>'];
html = [html, '<div class="equation">a = T / (0.85 · f_c'' · b)<br>', ...
'= <span class="highlight">', num2str(a, '%.2f'), ' in</span></div>'];
c = a / beta1;
html = [html, '<div class="equation">c = a / β&sub1; = ', num2str(a, '%.2f'), ' / ', num2str(beta1, '%.2f'), '<br>', ...
'= <span class="highlight">', num2str(c, '%.2f'), ' in</span></div>'];
% Strain compatibility check
eps_y = fy_ksi / Es_ksi;
eps_s = ((d - c) / c) * E_cu;
html = [html, '<h3>5. Strain Compatibility Check (ε_s ≥ ε_y)</h3>'];
html = [html, '<div class="equation">ε_y = f_y / E_s = ', num2str(eps_y, '%.5f'), '<br>', ...
'ε_s = ((d - c) / c) · ε_cu<br>', ...
'= <span class="highlight">', num2str(eps_s, '%.5f'), '</span></div>'];
if eps_s >= eps_y
html = [html, '<p class="success">Tension steel yielded. Assumption confirmed gracefully.</p>'];
else
html = [html, '<p class="danger">Assumption failed! Steel did not yield.</p>'];
end
% Calculate the raw moment capacity
Mn = T * (d - a/2) / 12;
html = [html, '<h3>6. Nominal Moment (M_n)</h3>'];
html = [html, '<div class="equation">M_n = T · (d - a/2) / 12<br>', ...
'= <span class="highlight">', num2str(Mn, '%.2f'), ' kip-ft</span></div>'];
% Checking code requirements for minimum reinforcements
As_min = (As_min_factor / fy) * b * d;
html = [html, '<h3>7. Check Minimum Code Rules</h3>'];
html = [html, '<div class="equation">A_s,min = (', num2str(As_min_factor), ' / f_y) · b · d<br>', ...
'= <span class="highlight">', num2str(As_min, '%.2f'), ' in²</span></div>'];
if As >= As_min
html = [html, '<p class="success">A_s exceeds minimum rules. Wonderful.</p>'];
else
html = [html, '<p class="danger">A_s falls short of required minimum!</p>'];
end
% Extra steps for single layer reduction factor calculation
if strcmp(mode, 'Single Layer')
eps_t = eps_s;
if eps_t >= 0.005
phi = 0.90;
elseif eps_t <= 0.002
phi = 0.65;
else
phi = 0.65 + (eps_t - 0.002) * (250/3);
end
phi_Mn = phi * Mn;
html = [html, '<h3>8. Strength Reduction Factor (φ)</h3>'];
html = [html, '<div class="equation">ε_t = ', num2str(eps_t, '%.5f'), '<br>', ...
'φ = <span class="highlight">', num2str(phi, '%.2f'), '</span></div>'];
html = [html, '<h3>9. Designed Maximum Moment (φM_n)</h3>'];
html = [html, '<div class="equation">φM_n = ', num2str(phi, '%.2f'), ' × ', num2str(Mn, '%.2f'), '<br>', ...
'= <span class="highlight">', num2str(phi_Mn, '%.2f'), ' kip-ft</span></div>'];
end
elseif strcmp(mode, 'Double Layer')
% --- Advanced Multiple Layers processing ---
n_bars2 = app.FieldBars2.Value;
a_bar2 = app.FieldArea2.Value;
spacing = app.FieldSpacing.Value;
% Centroid gymnastics for double layers
As1 = n_bars * a_bar;
As2 = n_bars2 * a_bar2;
As = As1 + As2;
dist1 = cover;
dist2 = cover + spacing;
g = (As1 * dist1 + As2 * dist2) / As;
d = h - g;
d_t = h - cover;
html = [html, '<h3>1. Resolve the Steel Centroids</h3>'];
html = [html, '<div class="equation">g = (A_s1 · y1 + A_s2 · y2) / A_s<br>', ...
'= (', num2str(As1), ' × ', num2str(dist1), ' + ', num2str(As2), ' × ', num2str(dist2), ') / ', num2str(As), '<br>', ...
'= ', num2str(g, '%.2f'), ' in</div>'];
html = [html, '<div class="equation">d = h - g = ', num2str(h), ' - ', num2str(g, '%.2f'), '<br>', ...
'= <span class="highlight">', num2str(d, '%.2f'), ' in</span></div>'];
% Assume Yield again
T = As * fy_ksi;
a = T / (0.85 * fc_ksi * b);
c = a / beta1;
html = [html, '<h3>2. Solve Basic Block (Assuming Yield)</h3>'];
html = [html, '<div class="equation">T = ', num2str(T, '%.2f'), ' kips<br>', ...
'a = ', num2str(a, '%.2f'), ' in<br>', ...
'c = <span class="highlight">', num2str(c, '%.2f'), ' in</span></div>'];
eps_y = fy_ksi / Es_ksi;
eps_s = ((d - c) / c) * E_cu;
html = [html, '<h3>3. Verify the Yield Strain</h3>'];
html = [html, '<div class="equation">ε_s = ', num2str(eps_s, '%.5f'), ' | ε_y = ', num2str(eps_y, '%.5f'), '</div>'];
% More complex quadratic solving requested for over-reinforced double layers
if eps_s < eps_y
html = [html, '<p class="danger">Assumption Failed! Solving via Quadratic Exact Match...</p>'];
A_quad = 0.85 * fc_ksi * b * beta1;
B_quad = As * Es_ksi * E_cu;
C_quad = -1 * As * Es_ksi * E_cu * d;
% Find actual real root
roots_c = roots([A_quad, B_quad, C_quad]);
c_new = max(roots_c(roots_c > 0));
a_new = beta1 * c_new;
html = [html, '<div class="equation">Quadratic Form Evaluated for c:<br>', ...
'c = <span class="highlight">', num2str(c_new, '%.2f'), ' in</span><br>', ...
'a = <span class="highlight">', num2str(a_new, '%.2f'), ' in</span></div>'];
c = c_new;
a = a_new;
% Recalculate accurately
T = As * Es_ksi * ((d - c)/c) * E_cu;
html = [html, '<div class="equation">Accurate Balance Tension T = C_c = <span class="highlight">', num2str(T, '%.2f'), ' kips</span></div>'];
else
html = [html, '<p class="success">Assumption smoothly verified.</p>'];
end
% Compute derived raw moment
Mn = T * (d - a/2) / 12;
html = [html, '<h3>4. Base Moment Geometry (M_n)</h3>'];
html = [html, '<div class="equation">M_n = T · (d - a/2) / 12<br>', ...
'= <span class="highlight">', num2str(Mn, '%.2f'), ' kip-ft</span></div>'];
% For double layers, compute reduction on the most extreme layer strain
eps_t = ((d_t - c) / c) * E_cu;
if eps_t >= 0.005
phi = 0.90;
elseif eps_t <= 0.002
phi = 0.65;
else
phi = 0.65 + (eps_t - 0.002) * (250/3);
end
html = [html, '<h3>5. Reduction Factor for Design Result</h3>'];
html = [html, '<div class="equation">ε_t (extreme) = ', num2str(eps_t, '%.5f'), '<br>', ...
'φ = ', num2str(phi, '%.2f'), '<br>', ...
'φM_n = <span class="highlight">', num2str(phi*Mn, '%.2f'), ' kip-ft</span></div>'];
end
% Close and assign to the beautiful HTML widget
html = [html, '</body></html>'];
app.EquationHTML.HTMLSource = html;
% Add to our active log so we have a trace
app.addLog(sprintf('Computed [%s] cleanly. End M_n: %.2f k-ft.', mode, Mn));
end
% This simple helper lets us comfortably add logs with timestamps
function addLog(app, msg)
timestamp = datestr(now, 'HH:MM:SS');
logEntry = sprintf('[%s] %s', timestamp, msg);
app.LogHistory = [app.LogHistory; {logEntry}];
% Keep logs fairly recent to keep memory efficient
if length(app.LogHistory) > 40
app.LogHistory(1) = [];
end
app.LogTextArea.Value = app.LogHistory;
end
end
end
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