I AM MODELING A GRID OF SHEAR WALLS SUPPORTING A SLAB HOLDING WATER, SOMETHING LIKE AN ELEVATED SWIMMING POOL. I HAVE MODELED HYDROSTATIC LOAD AS TRAPEZOIDAL PARTIAL SURFACE PRESSURE AND I AM GETTING WARNING "LOAD OUTSIDE SURFACE BOUNDARIES OR INSIDE

STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 24-Feb-19
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
134 0 0 0; 135 8.8 0 0; 136 0 0 5; 137 8.8 0 5; 138 0.4 0 0; 139 0.4 0 5;
140 0.8 0 0; 141 0.8 0 5; 142 1.2 0 0; 143 1.2 0 5; 144 1.6 0 0; 145 1.6 0 5;
146 2 0 0; 147 2 0 5; 148 2.4 0 0; 149 2.4 0 5; 150 2.8 0 0; 151 2.8 0 5;
152 3.2 0 0; 153 3.2 0 5; 154 3.6 0 0; 155 3.6 0 5; 156 4 0 0; 157 4 0 5;
158 4.4 0 0; 159 4.4 0 5; 160 4.8 0 0; 161 4.8 0 5; 162 5.2 0 0; 163 5.2 0 5;
164 5.6 0 0; 165 5.6 0 5; 166 6 0 0; 167 6 0 5; 168 6.4 0 0; 169 6.4 0 5;
170 6.8 0 0; 171 6.8 0 5; 172 7.2 0 0; 173 7.2 0 5; 174 7.6 0 0; 175 7.6 0 5;
176 8 0 0; 177 8 0 5; 178 8.4 0 0; 179 8.4 0 5; 180 0 0 0.25; 181 8.8 0 0.25;
182 0 0 0.5; 183 8.8 0 0.5; 184 0 0 0.75; 185 8.8 0 0.75; 186 0 0 1;
187 8.8 0 1; 188 0 0 1.25; 189 8.8 0 1.25; 190 0 0 1.5; 191 8.8 0 1.5;
192 0 0 1.75; 193 8.8 0 1.75; 194 0 0 2; 195 8.8 0 2; 196 0 0 2.25;
197 8.8 0 2.25; 198 0 0 2.5; 199 8.8 0 2.5; 200 0 0 2.75; 201 8.8 0 2.75;
202 0 0 3; 203 8.8 0 3; 204 0 0 3.25; 205 8.8 0 3.25; 206 0 0 3.5;
207 8.8 0 3.5; 208 0 0 3.75; 209 8.8 0 3.75; 210 0 0 4; 211 8.8 0 4;
212 0 0 4.25; 213 8.8 0 4.25; 214 0 0 4.5; 215 8.8 0 4.5; 216 0 0 4.75;
217 8.8 0 4.75; 218 1.6 0 1.25; 219 6.4 0 1.25; 220 1.6 0 3.75; 221 6.4 0 3.75;
222 1.6 0 2.5; 223 2.4 0 1.25; 224 3.2 0 1.25; 225 4 0 1.25; 226 4.8 0 1.25;
227 5.6 0 1.25; 228 6.4 0 2.5; 229 2.4 0 3.75; 230 3.2 0 3.75; 231 4 0 3.75;
232 4.8 0 3.75; 233 5.6 0 3.75; 234 0 -1.08 0; 235 8.8 -1.08 0; 236 0 -1.08 5;
237 8.8 -1.08 5; 238 0.4 -1.08 0; 239 0.4 -1.08 5; 240 0.8 -1.08 0;
241 0.8 -1.08 5; 242 1.2 -1.08 0; 243 1.2 -1.08 5; 244 1.6 -1.08 0;
245 1.6 -1.08 5; 246 2 -1.08 0; 247 2 -1.08 5; 248 2.4 -1.08 0;
249 2.4 -1.08 5; 250 2.8 -1.08 0; 251 2.8 -1.08 5; 252 3.2 -1.08 0;
253 3.2 -1.08 5; 254 3.6 -1.08 0; 255 3.6 -1.08 5; 256 4 -1.08 0;
257 4 -1.08 5; 258 4.4 -1.08 0; 259 4.4 -1.08 5; 260 4.8 -1.08 0;
261 4.8 -1.08 5; 262 5.2 -1.08 0; 263 5.2 -1.08 5; 264 5.6 -1.08 0;
265 5.6 -1.08 5; 266 6 -1.08 0; 267 6 -1.08 5; 268 6.4 -1.08 0;
269 6.4 -1.08 5; 270 6.8 -1.08 0; 271 6.8 -1.08 5; 272 7.2 -1.08 0;
273 7.2 -1.08 5; 274 7.6 -1.08 0; 275 7.6 -1.08 5; 276 8 -1.08 0;
277 8 -1.08 5; 278 8.4 -1.08 0; 279 8.4 -1.08 5; 280 0 -1.08 0.25;
281 8.8 -1.08 0.25; 282 0 -1.08 0.5; 283 8.8 -1.08 0.5; 284 0 -1.08 0.75;
285 8.8 -1.08 0.75; 286 0 -1.08 1; 287 8.8 -1.08 1; 288 0 -1.08 1.25;
289 8.8 -1.08 1.25; 290 0 -1.08 1.5; 291 8.8 -1.08 1.5; 292 0 -1.08 1.75;
293 8.8 -1.08 1.75; 294 0 -1.08 2; 295 8.8 -1.08 2; 296 0 -1.08 2.25;
297 8.8 -1.08 2.25; 298 0 -1.08 2.5; 299 8.8 -1.08 2.5; 300 0 -1.08 2.75;
301 8.8 -1.08 2.75; 302 0 -1.08 3; 303 8.8 -1.08 3; 304 0 -1.08 3.25;
305 8.8 -1.08 3.25; 306 0 -1.08 3.5; 307 8.8 -1.08 3.5; 308 0 -1.08 3.75;
309 8.8 -1.08 3.75; 310 0 -1.08 4; 311 8.8 -1.08 4; 312 0 -1.08 4.25;
313 8.8 -1.08 4.25; 314 0 -1.08 4.5; 315 8.8 -1.08 4.5; 316 0 -1.08 4.75;
317 8.8 -1.08 4.75; 318 1.6 -1.08 1.25; 319 6.4 -1.08 1.25; 320 1.6 -1.08 3.75;
321 6.4 -1.08 3.75; 322 1.6 -1.08 2.5; 323 2.4 -1.08 1.25; 324 3.2 -1.08 1.25;
325 4 -1.08 1.25; 326 4.8 -1.08 1.25; 327 5.6 -1.08 1.25; 328 6.4 -1.08 2.5;
329 2.4 -1.08 3.75; 330 3.2 -1.08 3.75; 331 4 -1.08 3.75; 332 4.8 -1.08 3.75;
333 5.6 -1.08 3.75;
ELEMENT INCIDENCES SHELL
1 134 144 218 188; 2 144 152 224 218; 3 152 160 226 224; 4 160 168 219 226;
5 188 218 222 198; 9 198 222 220 208; 13 208 220 145 136; 14 220 230 153 145;
15 230 232 161 153; 16 232 221 169 161; 17 168 135 189 219; 18 219 189 199 228;
19 228 199 209 221; 20 221 209 137 169;
SURFACE INCIDENCE
234 134 135 235 SURFACE 1 DIV 10 22 10 22
236 136 137 237 SURFACE 2 DIV 10 22 10 22
234 134 136 236 SURFACE 3 DIV 10 20 10 20
235 135 137 237 SURFACE 4 DIV 10 20 10 20
288 188 189 289 SURFACE 5 DIV 10 22 10 22
308 208 209 309 SURFACE 6 DIV 10 22 10 22
244 144 145 245 SURFACE 7 DIV 10 20 10 20
268 168 169 269 SURFACE 8 DIV 10 20 10 20
328 228 199 299 SURFACE 9 DIV 10 6 10 6
298 198 222 322 SURFACE 10 DIV 10 4 10 4
324 252 152 224 SURFACE 11 DIV 5 10 5 10
326 260 160 226 SURFACE 12 DIV 5 10 5 10
330 230 153 253 SURFACE 13 DIV 10 5 10 5
261 332 232 161 SURFACE 14 DIV 5 10 5 10
318 319 321 320 SURFACE 15 DIV 12 10 12 10
ELEMENT PROPERTY
1 TO 5 9 13 TO 20 THICKNESS 0.18
DEFINE MATERIAL START
ISOTROPIC CONCRETE
E 2.17185e+007
POISSON 0.17
DENSITY 23.5616
ALPHA 1e-005
DAMP 0.05
TYPE CONCRETE
STRENGTH FCU 27579
END DEFINE MATERIAL
SURFACE PROPERTY
1 TO 15 THICKNESS 0.2
SURFACE CONSTANTS
MATERIAL CONCRETE ALL
CONSTANTS
MATERIAL CONCRETE ALL
SUPPORTS
234 TO 317 FIXED
LOAD 1 LOADTYPE Dead TITLE DLOAD
SSELFWT Y -1 ALL
SELFWEIGHT Y -1
LOAD 2 LOADTYPE Live TITLE LLOAD
SURFACE LOAD
15 PR GY -10
5 TRAP GZ -10 -10 0 0 COR -1.6 0 -6.4 1.08
6 TRAP GZ 10 10 0 0 COR -1.6 0 -6.4 1.08
7 TRAP -10 -10 0 0 COR -1.25 0 -3.75 1.08
8 TRAP 10 10 0 0 COR -1.25 0 -3.75 1.08
LOAD COMB 3 COMBINATION LOAD CASE 3
1 1.4 2 1.6
PERFORM ANALYSIS
FINISH