Structural Modeling, Analysis and Design

“Food Court” Building For ITL Infosys, Hyderabad

Submitted By: Amit Kumar Saran

Ashwini Kumar Bharat Sondhi

M.Tech. (IT in Building Science), IIIT,Hyderabad

Index

1. Structural Modeling Structural Details of the building

Modeling with STAAD Modeling with AutoCAD 2. Structural Analysis

Wind Load Analysis Seismic Load Analysis Base Shear Calculations Load Distribution Possible Load Combinations Analysis results

3. Structural Design Design of beams Design of ring beam Design of Columns Design of Footings Design of Slab

1. Structural Modeling

Reliability and accuracy of design of a building structure largely depends on how accurately and meticulously it has been perceived and modeled. This structure has been modeled in both STAAD as well as AutoCAD after several careful inspections of the site as well as architectural drawings. Some of the salient features of the building are:

1. A shell structure used as a dome of the building 2. A Space Frame structure consisting of a food court cum auditorium, aerobics room and cyber-cafe Structural Details of the building: Total no. of members / elements: 548 Total no. of joints: 388 Total no. of supports: 56 Total no. of degrees of freedom: 1992 Size of stiffness matrix: 1, 79,280 There are 4 representative Ring Beams: RB1, RB2, RB3, and RB4 each in 3 rings. No. of columns in the innermost ring = 4 No. of columns in last but penultimate ring = 8 No. of columns in penultimate ring = 16 No. of columns in the outermost ring = 16 No. of columns in the corners = 12 There are 3 representative radial beams: B1, B2 and B3 Ring Beams in the structure were modeled as straight line elements, each of them are at an angle of 5.625 degrees.

Structural Modeling in STAAD Structure was modeled in STAAD-III by using its in-built modeling facilities. It was modeled using file-input as well as user-interface facility provided in STAAD.

Input parameters in the STAAD input file are as follows: STAAD SPACE INFOSYS INPUT WIDTH 72 UNIT METER KNS JOINT COORDINATES 1 73.438 .000 36.719 2 73.261 .000 33.120 3 72.732 .000 29.556 4 71.857 .000 26.060 5 70.643 .000 22.667 6 69.102 .000 19.410 7 67.250 .000 16.319 8 65.103 .000 13.425 9 62.683 .000 10.755 10 60.013 .000 8.335 11 57.119 .000 6.188 12 54.028 .000 4.336 13 50.771 .000 2.795 14 47.378 .000 1.581 15 43.882 .000 .706 16 40.318 .000 .177 17 36.719 .000 .000 18 33.120 .000 .177 19 29.556 .000 .706 20 26.060 .000 1.581 21 22.667 .000 2.795 22 19.410 .000 4.336 23 16.319 .000 6.188 24 13.425 .000 8.335 25 10.755 .000 10.755 26 8.335 .000 13.425 27 6.188 .000 16.319 28 4.336 .000 19.410 29 2.795 .000 22.667 30 1.581 .000 26.060 31 .706 .000 29.556 32 .177 .000 33.120 33 .000 .000 36.719 34 .177 .000 40.318 35 .706 .000 43.882 36 1.581 .000 47.378 37 2.795 .000 50.771 38 4.336 .000 54.028 39 6.188 .000 57.119 40 8.335 .000 60.013 41 10.755 .000 62.683

42 13.425 .000 65.103 43 16.319 .000 67.250 44 19.410 .000 69.102 45 22.667 .000 70.643 46 26.060 .000 71.857 47 29.556 .000 72.732 48 33.120 .000 73.261 49 36.719 .000 73.438 50 40.318 .000 73.261 51 43.882 .000 72.732 52 47.378 .000 71.857 53 50.771 .000 70.643 54 54.028 .000 69.102 55 57.119 .000 67.250 56 60.013 .000 65.103 57 62.683 .000 62.683 58 65.103 .000 60.013 59 67.250 .000 57.119 60 69.102 .000 54.028 61 70.643 .000 50.771 62 71.857 .000 47.378 63 72.732 .000 43.882 64 73.261 .000 40.318 65 60.317 .000 36.719 66 60.203 .000 34.406 67 59.864 .000 32.115 68 59.301 .000 29.869 69 58.521 .000 27.688 70 57.531 .000 25.595 71 56.340 .000 23.609 72 54.960 .000 21.749 73 53.405 .000 20.033 74 51.689 .000 18.478 75 49.829 .000 17.098 76 47.843 .000 15.907 77 45.750 .000 14.917 78 43.569 .000 14.137 79 41.323 .000 13.574 80 39.032 .000 13.235 81 36.719 .000 13.121 82 34.406 .000 13.235 83 32.115 .000 13.574 84 29.869 .000 14.137 85 27.688 .000 14.917 86 25.595 .000 15.907 87 23.609 .000 17.098 88 21.749 .000 18.478 89 20.033 .000 20.033 90 18.478 .000 21.749 91 17.098 .000 23.609 92 15.907 .000 25.595 93 14.917 .000 27.688 94 14.137 .000 29.869 95 13.574 .000 32.115 96 13.235 .000 34.406 97 13.121 .000 36.719 98 13.235 .000 39.032 99 13.574 .000 41.323 100 14.137 .000 43.569 101 14.917 .000 45.750

102 15.907 .000 47.843 103 17.098 .000 49.829 104 18.478 .000 51.689 105 20.033 .000 53.405 106 21.749 .000 54.960 107 23.609 .000 56.340 108 25.595 .000 57.531 109 27.688 .000 58.521 110 29.869 .000 59.301 111 32.115 .000 59.864 112 34.406 .000 60.203 113 36.719 .000 60.317 114 39.032 .000 60.203 115 41.323 .000 59.864 116 43.569 .000 59.301 117 45.750 .000 58.521 118 47.843 .000 57.531 119 49.829 .000 56.340 120 51.689 .000 54.960 121 53.405 .000 53.405 122 54.960 .000 51.689 123 56.340 .000 49.829 124 57.531 .000 47.843 125 58.521 .000 45.750 126 59.301 .000 43.569 127 59.864 .000 41.323 128 60.203 .000 39.032 129 52.052 .000 36.719 130 51.978 .000 35.216 131 51.757 .000 33.728 132 51.392 .000 32.268 133 50.885 .000 30.851 134 50.242 .000 29.491 135 49.468 .000 28.200 136 48.572 .000 26.992 137 47.561 .000 25.877 138 46.446 .000 24.866 139 45.238 .000 23.970 140 43.947 .000 23.197 141 42.587 .000 22.553 142 41.170 .000 22.046 143 39.710 .000 21.681 144 38.222 .000 21.460 145 36.719 .000 21.386 146 35.216 .000 21.460 147 33.728 .000 21.681 148 32.268 .000 22.046 149 30.851 .000 22.553 150 29.491 .000 23.197 151 28.200 .000 23.970 152 26.992 .000 24.866 153 25.877 .000 25.877 154 24.866 .000 26.992 155 23.970 .000 28.200 156 23.197 .000 29.491 157 22.553 .000 30.851 158 22.046 .000 32.268 159 21.681 .000 33.728 160 21.460 .000 35.216 161 21.386 .000 36.719

162 21.460 .000 38.222 163 21.681 .000 39.710 164 22.046 .000 41.170 165 22.553 .000 42.587 166 23.197 .000 43.947 167 23.970 .000 45.238 168 24.866 .000 46.446 169 25.877 .000 47.561 170 26.992 .000 48.572 171 28.200 .000 49.468 172 29.491 .000 50.242 173 30.851 .000 50.885 174 32.268 .000 51.392 175 33.728 .000 51.757 176 35.216 .000 51.978 177 36.719 .000 52.052 178 38.222 .000 51.978 179 39.710 .000 51.757 180 41.170 .000 51.392 181 42.587 .000 50.885 182 43.947 .000 50.242 183 45.238 .000 49.468 184 46.446 .000 48.572 185 47.561 .000 47.561 186 48.572 .000 46.446 187 49.468 .000 45.238 188 50.242 .000 43.947 189 50.885 .000 42.587 190 51.392 .000 41.170 191 51.757 .000 39.710 192 51.978 .000 38.222 193 72.732 -5.500 29.556 194 67.250 -5.500 16.319 195 57.119 -5.500 6.188 196 43.882 -5.500 .706 197 29.556 -5.500 .706 198 16.319 -5.500 6.188 199 6.188 -5.500 16.319 200 .706 -5.500 29.556 201 .706 -5.500 43.882 202 6.188 -5.500 57.119 203 16.319 -5.500 67.250 204 29.556 -5.500 72.732 205 43.882 -5.500 72.732 206 57.119 -5.500 67.250 207 67.250 -5.500 57.119 208 72.732 -5.500 43.882 209 59.864 -5.500 32.115 210 56.340 -5.500 23.609 211 49.829 -5.500 17.098 212 41.323 -5.500 13.574 213 32.115 -5.500 13.574 214 23.609 -5.500 17.098 215 17.098 -5.500 23.609 216 13.574 -5.500 32.115 217 13.574 -5.500 41.323 218 17.098 -5.500 49.829 219 23.609 -5.500 56.340 220 32.115 -5.500 59.864 221 41.323 -5.500 59.864

222 49.829 -5.500 56.340 223 56.340 -5.500 49.829 224 59.864 -5.500 41.323 225 50.885 -5.500 30.851 226 42.587 -5.500 22.553 227 30.851 -5.500 22.553 228 22.553 -5.500 30.851 229 22.553 -5.500 42.587 230 30.851 -5.500 50.885 231 42.587 -5.500 50.885 232 50.885 -5.500 42.587 233 60.317 5.000 36.719 234 60.203 5.000 34.406 235 59.864 5.000 32.115 236 59.301 5.000 29.869 237 58.521 5.000 27.688 238 57.531 5.000 25.595 239 56.340 5.000 23.609 240 54.960 5.000 21.749 241 53.405 5.000 20.033 242 51.689 5.000 18.478 243 49.829 5.000 17.098 244 47.843 5.000 15.907 245 45.750 5.000 14.917 246 43.569 5.000 14.137 247 41.323 5.000 13.574 248 39.032 5.000 13.235 249 36.719 5.000 13.121 250 34.406 5.000 13.235 251 32.115 5.000 13.574 252 29.869 5.000 14.137 253 27.688 5.000 14.917 254 25.595 5.000 15.907 255 23.609 5.000 17.098 256 21.749 5.000 18.478 257 20.033 5.000 20.033 258 18.478 5.000 21.749 259 17.098 5.000 23.609 260 15.907 5.000 25.595 261 14.917 5.000 27.688 262 14.137 5.000 29.869 263 13.574 5.000 32.115 264 13.235 5.000 34.406 265 13.121 5.000 36.719 266 13.235 5.000 39.032 267 13.574 5.000 41.323 268 14.137 5.000 43.569 269 14.917 5.000 45.750 270 15.907 5.000 47.843 271 17.098 5.000 49.829 272 18.478 5.000 51.689 273 20.033 5.000 53.405 274 21.749 5.000 54.960 275 23.609 5.000 56.340 276 25.595 5.000 57.531 277 27.688 5.000 58.521 278 29.869 5.000 59.301 279 32.115 5.000 59.864 280 34.406 5.000 60.203 281 36.719 5.000 60.317

282 39.032 5.000 60.203 283 41.323 5.000 59.864 284 43.569 5.000 59.301 285 45.750 5.000 58.521 286 47.843 5.000 57.531 287 49.829 5.000 56.340 288 51.689 5.000 54.960 289 53.405 5.000 53.405 290 54.960 5.000 51.689 291 56.340 5.000 49.829 292 57.531 5.000 47.843 293 58.521 5.000 45.750 294 59.301 5.000 43.569 295 59.864 5.000 41.323 296 60.203 5.000 39.032 297 44.386 .000 36.719 298 44.349 .000 35.967 299 44.239 .000 35.223 300 44.056 .000 34.493 301 43.802 .000 33.785 302 43.481 .000 33.105 303 43.094 .000 32.459 304 42.646 .000 31.855 305 42.140 .000 31.298 306 41.583 .000 30.792 307 40.979 .000 30.344 308 40.333 .000 29.957 309 39.653 .000 29.636 310 38.945 .000 29.382 311 38.215 .000 29.199 312 37.471 .000 29.089 313 36.719 .000 29.052 314 35.967 .000 29.089 315 35.223 .000 29.199 316 34.493 .000 29.382 317 33.785 .000 29.636 318 33.105 .000 29.957 319 32.459 .000 30.344 320 31.855 .000 30.792 321 31.298 .000 31.298 322 30.792 .000 31.855 323 30.344 .000 32.459 324 29.957 .000 33.105 325 29.636 .000 33.785 326 29.382 .000 34.493 327 29.199 .000 35.223 328 29.089 .000 35.967 329 29.052 .000 36.719 330 29.089 .000 37.471 331 29.199 .000 38.215 332 29.382 .000 38.945 333 29.636 .000 39.653 334 29.957 .000 40.333 335 30.344 .000 40.979 336 30.792 .000 41.583 337 31.298 .000 42.140 338 31.855 .000 42.646 339 32.459 .000 43.094 340 33.105 .000 43.481 341 33.785 .000 43.802

342 34.493 .000 44.056 343 35.223 .000 44.239 344 35.967 .000 44.349 345 36.719 .000 44.386 346 37.471 .000 44.349 347 38.215 .000 44.239 348 38.945 .000 44.056 349 39.653 .000 43.802 350 40.333 .000 43.481 351 40.979 .000 43.094 352 41.583 .000 42.646 353 42.140 .000 42.140 354 42.646 .000 41.583 355 43.094 .000 40.979 356 43.481 .000 40.333 357 43.802 .000 39.653 358 44.056 .000 38.945 359 44.239 .000 38.215 360 44.349 .000 37.471 361 42.140 -5.500 31.298 362 31.298 -5.500 31.298 363 31.298 -5.500 42.140 364 42.140 -5.500 42.140 365 66.568 .000 12.345 366 66.568 .000 2.916 367 59.372 .000 2.666 368 14.066 .000 2.666 369 6.870 .000 2.916 370 6.870 .000 12.345 371 6.870 .000 61.093 372 6.870 .000 70.522 373 14.066 .000 70.522 374 59.372 .000 70.522 375 66.568 .000 70.522 376 66.568 .000 61.093 377 66.568 -5.500 12.345 378 66.568 -5.500 2.916 379 59.372 -5.500 2.666 380 14.066 -5.500 2.666 381 6.870 -5.500 2.916 382 6.870 -5.500 12.345 383 6.870 -5.500 61.093 384 6.870 -5.500 70.522 385 14.066 -5.500 70.522 386 59.372 -5.500 70.522 387 66.568 -5.500 70.522 388 66.568 -5.500 61.093 MEMBER INCIDENCES 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 11 11 11 12 12 12 13

13 13 14 14 14 15 15 15 16 16 16 17 17 17 18 18 18 19 19 19 20 20 20 21 21 21 22 22 22 23 23 23 24 24 24 25 25 25 26 26 26 27 27 27 28 28 28 29 29 29 30 30 30 31 31 31 32 32 32 33 33 33 34 34 34 35 35 35 36 36 36 37 37 37 38 38 38 39 39 39 40 40 40 41 41 41 42 42 42 43 43 43 44 44 44 45 45 45 46 46 46 47 47 47 48 48 48 49 49 49 50 50 50 51 51 51 52 52 52 53 53 53 54 54 54 55 55 55 56 56 56 57 57 57 58 58 58 59 59 59 60 60 60 61 61 61 62 62 62 63 63 63 64 64 64 1 65 65 66 66 66 67 67 67 68 68 68 69 69 69 70 70 70 71 71 71 72 72 72 73

73 73 74 74 74 75 75 75 76 76 76 77 77 77 78 78 78 79 79 79 80 80 80 81 81 81 82 82 82 83 83 83 84 84 84 85 85 85 86 86 86 87 87 87 88 88 88 89 89 89 90 90 90 91 91 91 92 92 92 93 93 93 94 94 94 95 95 95 96 96 96 97 97 97 98 98 98 99 99 99 100 100 100 101 101 101 102 102 102 103 103 103 104 104 104 105 105 105 106 106 106 107 107 107 108 108 108 109 109 109 110 110 110 111 111 111 112 112 112 113 113 113 114 114 114 115 115 115 116 116 116 117 117 117 118 118 118 119 119 119 120 120 120 121 121 121 122 122 122 123 123 123 124 124 124 125 125 125 126 126 126 127 127 127 128 128 128 65 129 129 130 130 130 131 131 131 132 132 132 133

133 133 134 134 134 135 135 135 136 136 136 137 137 137 138 138 138 139 139 139 140 140 140 141 141 141 142 142 142 143 143 143 144 144 144 145 145 145 146 146 146 147 147 147 148 148 148 149 149 149 150 150 150 151 151 151 152 152 152 153 153 153 154 154 154 155 155 155 156 156 156 157 157 157 158 158 158 159 159 159 160 160 160 161 161 161 162 162 162 163 163 163 164 164 164 165 165 165 166 166 166 167 167 167 168 168 168 169 169 169 170 170 170 171 171 171 172 172 172 173 173 173 174 174 174 175 175 175 176 176 176 177 177 177 178 178 178 179 179 179 180 180 180 181 181 181 182 182 182 183 183 183 184 184 184 185 185 185 186 186 186 187 187 187 188 188 188 189 189 189 190 190 190 191 191 191 192 192 192 129

193 3 193 194 7 194 195 11 195 196 15 196 197 19 197 198 23 198 199 27 199 200 31 200 201 35 201 202 39 202 203 43 203 204 47 204 205 51 205 206 55 206 207 59 207 208 63 208 209 67 209 210 71 210 211 75 211 212 79 212 213 83 213 214 87 214 215 91 215 216 95 216 217 99 217 218 103 218 219 107 219 220 111 220 221 115 221 222 119 222 223 123 223 224 127 224 225 133 225 226 141 226 227 149 227 228 157 228 229 165 229 230 173 230 231 181 231 232 189 232 233 67 235 234 71 239 235 75 243 236 79 247 237 83 251 238 87 255 239 91 259 240 95 263 241 99 267 242 103 271 243 107 275 244 111 279 245 115 283 246 119 287 247 123 291 248 127 295 249 233 234 250 234 235 251 235 236 252 236 237

253 237 238 254 238 239 255 239 240 256 240 241 257 241 242 258 242 243 259 243 244 260 244 245 261 245 246 262 246 247 263 247 248 264 248 249 265 249 250 266 250 251 267 251 252 268 252 253 269 253 254 270 254 255 271 255 256 272 256 257 273 257 258 274 258 259 275 259 260 276 260 261 277 261 262 278 262 263 279 263 264 280 264 265 281 265 266 282 266 267 283 267 268 284 268 269 285 269 270 286 270 271 287 271 272 288 272 273 289 273 274 290 274 275 291 275 276 292 276 277 293 277 278 294 278 279 295 279 280 296 280 281 297 281 282 298 282 283 299 283 284 300 284 285 301 285 286 302 286 287 303 287 288 304 288 289 305 289 290 306 290 291 307 291 292 308 292 293 309 293 294 310 294 295 311 295 296 312 296 233

313 297 298 314 298 299 315 299 300 316 300 301 317 301 302 318 302 303 319 303 304 320 304 305 321 305 306 322 306 307 323 307 308 324 308 309 325 309 310 326 310 311 327 311 312 328 312 313 329 313 314 330 314 315 331 315 316 332 316 317 333 317 318 334 318 319 335 319 320 336 320 321 337 321 322 338 322 323 339 323 324 340 324 325 341 325 326 342 326 327 343 327 328 344 328 329 345 329 330 346 330 331 347 331 332 348 332 333 349 333 334 350 334 335 351 335 336 352 336 337 353 337 338 354 338 339 355 339 340 356 340 341 357 341 342 358 342 343 359 343 344 360 344 345 361 345 346 362 346 347 363 347 348 364 348 349 365 349 350 366 350 351 367 351 352 368 352 353 369 353 354 370 354 355 371 355 356 372 356 357

373 357 358 374 358 359 375 359 360 376 360 297 377 361 305 378 362 321 379 363 337 380 364 353 381 299 131 382 303 135 383 307 139 384 311 143 385 315 147 386 319 151 387 323 155 388 327 159 389 331 163 390 335 167 391 339 171 392 343 175 393 347 179 394 351 183 395 355 187 396 359 191 397 131 67 398 135 71 399 139 75 400 143 79 401 147 83 402 151 87 403 155 91 404 159 95 405 163 99 406 167 103 407 171 107 408 175 111 409 179 115 410 183 119 411 187 123 412 191 127 413 67 3 414 71 7 415 75 11 416 79 15 417 83 19 418 87 23 419 91 27 420 95 31 421 99 35 422 103 39 423 107 43 424 111 47 425 115 51 426 119 55 427 123 59 428 127 63 429 301 133 430 309 141 431 317 149 432 325 157

433 333 165 434 341 173 435 349 181 436 357 189 437 133 69 438 141 77 439 149 85 440 157 93 441 165 101 442 173 109 443 181 117 444 189 125 445 69 5 446 77 13 447 85 21 448 93 29 449 101 37 450 109 45 451 117 53 452 125 61 453 66 2 454 68 4 455 70 6 456 72 8 457 74 10 458 76 12 459 78 14 460 80 16 461 82 18 462 84 20 463 86 22 464 88 24 465 90 26 466 92 28 467 94 30 468 96 32 469 98 34 470 100 36 471 102 38 472 104 40 473 106 42 474 108 44 475 110 46 476 112 48 477 114 50 478 116 52 479 118 54 480 120 56 481 122 58 482 124 60 483 126 62 484 128 64 485 297 129 486 313 145 487 329 161 488 345 177 489 129 65 490 145 81 491 161 97 492 177 113

493 65 1 494 81 17 495 97 33 496 113 49 497 305 137 498 321 153 499 337 169 500 353 185 501 137 73 502 153 89 503 169 105 504 185 121 505 73 9 506 89 25 507 105 41 508 121 57 509 377 365 510 378 366 511 379 367 512 380 368 513 381 369 514 382 370 515 383 371 516 384 372 517 385 373 518 386 374 519 387 375 520 388 376 521 7 365 522 365 366 523 366 367 524 367 13 525 21 368 526 368 369 527 369 370 528 370 27 529 8 365 530 10 366 531 11 367 532 23 368 533 24 369 534 26 370 535 39 371 536 40 371 537 42 372 538 43 373 539 45 373 540 371 372 541 372 373 542 53 374 543 374 375 544 375 376 545 376 59 546 58 376 547 56 375 548 55 374 MEMBER PROPERTY INDIAN 1 TO 64 PRI YD .9 ZD .6 65 TO 128 PRI YD .9 ZD .750 129 TO 192 PRI YD .9 ZD .600

209 TO 224 PRI YD 1.2 ZD .450 225 TO 232 PRI YD .600 ZD .300 249 TO 312 PRI YD .900 ZD .600 193 198 201 206 PRI YD .500 ZD .300 194 TO 197 199 200 202 TO 205 207 208 PRI YD .800 ZD .300 233 TO 248 PRI YD 1.200 ZD .450 313 TO 376 PRI YD .900 ZD .600 377 TO 380 PRI YD .600 381 TO 396 PRI YD .900 ZD .300 429 TO 436 485 TO 488 497 TO 500 PRI YD .900 ZD .300 437 TO 442 444 TO 452 489 TO 496 501 TO 508 PRI YD .900 ZD .300 443 PRI YD .900 ZD .300 397 TO 399 401 TO 403 405 TO 407 409 TO 411 PRI YD .800 ZD .300 453 TO 484 PRI YD .800 ZD .300 413 TO 415 417 TO 419 421 TO 423 425 TO 427 PRI YD .800 ZD .300 523 TO 526 539 541 TO 543 PRI YD .900 ZD .300 529 TO 534 536 TO 538 546 TO 548 PRI YD .800 ZD .300 511 512 517 518 PRI YD .300 ZD .600 515 520 PRI YD .600 ZD .300 514 PRI YD .600 ZD .300 509 PRI YD .600 ZD .300 510 PRI YD .800 ZD .300 513 516 519 PRI YD .800 ZD .300 521 522 527 528 535 540 544 545 PRI YD .900 ZD .300 400 404 408 412 416 420 424 428 PRI YD .900 ZD .300 CONSTANT E CONCRETE ALL DENSITY CONCRETE ALL POISSON CONCRETE ALL SUPPORT 193 TO 232 FIXED 377 TO 380 FIXED 364 381 TO 388 FIXED 361 TO 363 FIXED *DEFINE WIND LOAD *TYPE 1 *INT 0. 1.1 HEI -4.5 20. *EXPOSURE 1. YR -5. 20.5 *LOAD 1 WIND LOAD IN Z *WIND LOAD Z 1. TYPE 1 LOAD 1 DL SHELL MEMBER LOAD 249 TO 312 UNI GY -24. LOAD 2 SELF SELFWEIGHT Y -1. LOAD 3 DL LL FF SLAB MEMBER LOAD 1 TO 64 UNI GY -7.02881 65 TO 128 UNI GY -11.5651 129 TO 192 UNI GY -7.2621 313 TO 376 UNI GY -2.68 413 TO 428 UNI GY -24.9444 453 TO 484 UNI GY -24.9444 445 TO 452 UNI GY -24.9444 429 TO 437 UNI GY -18.28 437 TO 444 UNI GY -27.90 381 TO 396 UNI GY -18.28 397 TO 412 UNI GY -27.9 499 501 490 502 491 503 492 504 489 UNI GY -27.9 496 508 493 505 507 495 506 494 UNI GY -24.9444

485 497 486 498 487 499 488 500 UNI GY -18.28 521 TO 528 539 TO 545 535 UNI GY -7.2621 529 TO 534 536 TO 538 546 TO 548 UNI GY -14.4 LOAD COMB 4 DL SHELL + SELF + DL LL FF SLAB 1 1.5 2 1.5 3 1.5 PERFORM ANALYSIS PRINT ALL LOAD LIST ALL PRINT ANALYSIS RESULTS PRINT MEMBER FORCES ALL PRINT SUPPORT REACTIONS FINISH Modeling with AutoCAD:

The space frame structure of the building was also modeled in AutoCAD for better CAD facilities provided with the software. The drawings in *.DXF format were then imported in STAAD software, where additional properties were applied to CAD model of the structures. The properties applied to the imported CAD drawing are as follows: 1. Sectional properties 2. Support conditions 3. Material Properties 4. Loading conditions Loading units were taken as per IS codes as follows: unit weight of concrete = 25 kN/m3

unit weight of 200 mm thick solid concrete block wall = 24 kN/m3

floor finish = 1 kN/m2

Live load at floor = 3.5 kN/m2

Live load at roof level = 1.5 kN/m2

2. STRUCTURAL ANALYSIS

Structure was analyzed for self-weight, live load, wind load and seismic loads. Analysis was performed in STAAD-III. Details of analysis are as follows: Wind Load Analysis: For wind load analysis all data is taken from Indian standard code : IS – 875 (Part – 3) – 1987 Design Wind Speed = Vb * k1 * k2 * k3 Where; Vb = Basic wind speed in m / s k1 = risk coefficient = .91 k2 = THS Factor = 1.02 k3 = Topography Factor = 1 Vb = 44 m / s for Hyderabad Terrain Category : 2 (open terrain with scattered obstructions of height between 1.5m to 10m) Class of Building : B (structures having maximum dimensions between 20m to 40m) Wind intensities: Design Wind Pressure = 0.6 * Vz2

Exposure Factor At all Joints = 1 Wind load intensity at 1st Floor = 1.0008 kN / m2

The wind load on the building shall be calculated for the building as a whole. Wind Load on the Building = Cf * Ae * Pd Where; Cf = Force Coefficient Ae = Effective Frontal Area Pd = Design Wind Pressure The value of Cf = 0.5 from Table – 23 of IS: 875 (Part – 3) for buildings of circular shape. Wind Load at each floor is distributed among the columns at that floor accordingly their relative stiffness. Seismic Load Analysis:

The Structure is analyzed as an equivalent static approach employing the use of a Seismic Coefficient method. Terminology: Basic Seismic Coefficient (a0) To give the basic design acceleration as a fraction of the acceleration due to gravity Importance Factor (I) To modify the basic seismic coefficient and seismic zone factor, depending upon the importance of structure Soil Foundation System Factor (ß) To modify the a0 and seismic zone factor, depending upon soil foundation system. Design Horizontal Seismic Coefficient (ah) Seismic coefficient taken for design

Earthquake Zone (Hyderabad) : Zone II Basic Horizontal Seismic Coefficient (a0) : 0.01 Coefficient depends upon soil foundation system (ß) (Hard Soil) : 1.0 Importance Factor (I) : 1.5 Design Value of Horizontal Seismic Coefficient, ah = ß * I * a0 = 0.015

Base Shear Calculations: The Base Shear is given by, Vb = K * C * ah * W Where K = Performance Factor according to structural framing system = 1 C = Coefficient defining the flexibility of structure (depends upon the no. of storey in structure) = 0.75 ah = Design Seismic Coefficient W = Total DL + 25 % of LL

Calculating base shear, Vb = K * C * ah * W = 1 * 0.62 * 0.04 *1947.2 = 482.9152 KN

• Load Distribution: The distribution of base shear along with the height of the building is given by, Qi = Vb * (Wi * hi2) / S (Wi * hi2)

Nodal forces and seismic shear forces at various floor levels

Floor Qi Vi

1 391.7677 482.9151

2 91.1473 91.1473

Possible Load Combinations: (Dead Load + Live Load + Wind Load) * FoS (Dead Load + Live Load) * FoS (Dead Load + Live Load + Earthquake Load) * FoS For 1st case FoS will be 1.5 and for the rest of the case FoS will be 1.2 as per IS – 456

Analysis results: Structure was analyzed in STAAD. SF and BM Diagrams as produced by STAAD

Bending Moment Diagram (isometric view) in STAAD

Shear Force Diagram (isometric view) in STAAD

SF and BM diagrams of beam B1 in STAAD

Deflection Diagrams

Simulation under deflection

Failure zones in the structure

Green – safe zone Yellow – moderate failure zone Red – extreme failure zone

Analysis result data: Shear force, bending moments, axial loads ( for columns) and torsion are calculated for each element.

3. Structural Design

All the members (beams, columns, footings) except slab were designed on a structural design package developed by our own team of students. The package has been tested with real-time problems and gives perfectly reliable results. Slab design was performed on STAAD. Design of beam B1

Alternate design of beam B1

Design of beam B2

Design of ring beam RB3 Ring beam RB3 has been designed manually. All the design calculations were done in a MATLAB script file, which is as follows.

After running script file in MATLAB editor, the outputs are as follows.

Designed cross-section of RB3: Provide section = 700 x 900 mm Provide 6 nos. – 28 mm diameter bars. Design of columns:

design of column C2

Design of column C3 Footing design for columns:

FOODFOOD--COURT FOR INFOSYS SOFTWARE TECHNOLOGY PARK, HyderabadCOURT FOR INFOSYS SOFTWARE TECHNOLOGY PARK, Hyderabad

Footing Design for C4

Design of slab (1st floor)

This document was created with Win2PDF available at http://www.daneprairie.com.The unregistered version of Win2PDF is for evaluation or non-commercial use only.