پایان نامه بررسی اثر خروج از مرکزیت جرم و P-Delta در سازه های فولادی با مهار بندی ساده (هم محور)

فهرست و منابع پایان نامه بررسی اثر خروج از مرکزیت جرم و P-Delta در سازه های فولادی با مهار بندی ساده (هم محور)

فهرست:

عنوان مطالب                                                                                          شماره صفحه

چکیده                                                                                                             مقدمه                                                                                                                   ٢

فصل اول : کلیات                                                                                                    ٣

١-١) هدف                                                                                                           ٣

١-٢) روش کار و تحقیق                                                                                     ٣

فصل دوم : آنالیز مرتبه دوم و اثرات غیرخطی هندسی                                                     ٥

٢-١) مقدمه                                                                                                            ٥

٢-٢) تعریف سختی هندسی T                                                                                  ٧

٢-٣) تحلیل تقریبی کمانش                                                                                     ١٠

٢-٤) تحلیل P-Delta ساختمانها                                                                              ١١

٢-٥) معادلات ساختمان های سه بعدی                                                                        ١٤

٢-٦) بزرگی اثرات P-Delta                                                                                ١٤

٢-٧) تحلیل P-Delta  بدون نیاز به اصلاح برنامه کامپیوتری                                       ١٥

٢-٨) ضرایب طول مؤثر K                                                                                 ١٥

٢-٩) روش های آنالیز مرتبه دوم الاستیک (استاتیکی )                                                   ١٦

٢-٩-١) آنالیز مرتبه دوم با روش المان تیر – ستون                                             ١٦

٢-٩-٢) تأثیر کاهش طول عضو در اثر انحنای آن                                               ١٩

٢-٩-٣) آنالیز الاستیک مرتبه دوم به روش المان محدود                                           ٢٠

٢-٩-٤) آنالیز الاستیک مرتبه دوم به روش بار مجازی                                              ٢٢

٢-١٠) روش تأثیر اثر P-Delta در تحلیل دینامیکی سازه ها                                             ٢٤

٢-١١) P-Delta در آئین نامه های طراحی (افزایش لنگر)                                                ٢٧

٢-١١-١) روش AISC در بخش تنش های مجاز (ASD)                                        ٢٧

٢-١١-٢) روش AISC در طراحی پلاستیک (PD)                                                ٢٨

٢-١١-٣) روش AISC در طراحی مقاومت نهایی (LRFD)                                   ٢٨

٢-١٢) P-Delta  در آئین نامه های زلزله                                                                     ٢٩

٢-١٢-١) آئین نامه ٢٨٠٠ ایران (ویرایش سوم )                                                     ٢٩

٢-١٢-٢) آئین نامه ٨ Euro Code                                                                    ٣٠

٢-١٢-٣) آئین نامه های UBC                                                                           ٣٠

٢-١٢-٤) آئین نامه ٢٠٠٣ NEHRP                                                                  ٣١

فصل سوم : پیچش                                                                                                  ٣٢

٣-١) مقدمه                                                                                                          ٣٢

٣-٢) تاریخچه مطالعات                                                                                           ٣٢

٣-٣) رفتار ارتجاعی سیستم های نامتقارن                                                                     ٣٣

٣-٤) رفتار غیرارتجاعی سیستم های نامتقارن                                                                ٣٤

٣-٥) سیستم های خطی الاستیک SDOF                                                                       ٣٦

٣-٥-١) سیستم SDOF                                                                                    ٣٦

٣-٥-٢) معادلات حرکت                                                                                   ٣٧

٣-٥-٣) آنالیز طیف پاسخ                                                                                  ٤١

٣-٥-٤) اثرات توأم جانبی پیچشی                                                                      ٤٥

٣-٦) سیستمهای خطی الاستیک چند طبقه MDOF                                                 ٤٨

٣-٦-١) تعاریف و فرضیات                                                                                   ٤٨

٣-٦-٢) معادلات حرکت                                                                                     ٤٩

٣-٦-٣) فرکانس های ارتعاشی و شکل های مودی                                                    ٥٣

٣-٦-٤) تعیین فرکانس های ارتعاشی و شکل های مودی                                             ٥٤

٣-٦-٥) تحلیل تقریبی فرکانس ها و بردارهای مودی ارتعاشی                                     ٥٧

٣-٦-٦) سیستم های یک طبقه معادل                                                                      ٥٩

٣-٦-٧) نیروهای زلزله                                                                                    ٦٠

٣-٦-٨) خلاصه روش تحلیل                                                                             ٦٣

٣-٧) پاسخ پیچشی لرزه ای : فرضیات و مشکلات تحقیقات                                                ٦٣

٣-٧-١) مدل سازی برای تحقیق در زمینه اثر دینامیکی پیچش                                     ٦٤

٣-٨) مقررات پیچشی در آئین نامه ها                                                                           ٧٠

٣-٨-١) روش محاسبه نیروی طراحی                                                                  ٧٠

٣-٨-٢) خروج از مرکزیت طراحی                                                                    ٧١

٣-٨-٣) نیروهای طراحی در المان ها                                                                   ٧٥

٣-٨-٤) کاربرد خروج از مرکزیت طراحی در ساختمان های چندطبقه                          ٧٦

٣-٩) مروری بر تحقیقات انجام شده در مورد خروج از مرکزیت طراحی                            ٧٧

٣-٩-١) خروج از مرکزیت دینامیکی                                                                   ٧٧

٣-٩-٢) خروج از مرکزیت تصادفی                                                                    ٨٣

فصل چهارم : روش های عددی برای تحلیل دینامیکی                                                       ٨٥

٤-١) مقدمه                                                                                                        ٨٥

٤-٢) روش های خانواده نیومارک                                                                               ٨٥

٤-٣) پایداری روش نیومارک                                                                                    ٨٧

٤-٤) روش شتاب متوسط                                                                                   ٨٨

٤-٥) ضریب θ ویلسون                                                                                          ٨٩

٤-٦) استفاده از میرایی متناسب با سختی                                                                    ٩٠

٤-٧) روش ،Hilber, Hughes and Taylor α                                                         ٩١

٤-٨) انتخاب روش انتگرال گیری مستقیم                                                                     ٩٢

٤-٩) تحلیل غیرخطی                                                                                            ٩٢

فصل پنجم : تحلیل غیرخطی سازه های فولادی                                                             ٩٤

۵-١) مقدمه                                                                                                         ٩٤

٥-٢) مروری بر روش ها و مدل های تحلیل غیرخطی دینامیکی                                         ٩٥

٥-٣) قوانین سخت شدگی کرنش                                                                                ٩٩

٥-٣-١) قانون سخت شدگی همسان                                                                     ١٠٠

٥-٣-٢) قانون سخت شدگی جنبشی                                                                     ١٠٠

٥-٣-٣) قانون سخت شدگی مستقل                                                                      ١٠١

٥-٤) مدل های پلاستیسیته چرخه ای                                                                           ١٠١

٥-٤-١) مدل الاستیک – کاملاً پلاستیک                                                                ١٠٢

۵-٤-٢) مدل سخت شدگی کرنشی دوخطی                                                           ١٠٢

٥-٤-٣) مدل سخت شدگی کرنشی چندخطی                                                          ١٠٤

٥-٤-٤) مدل رامبرگ اسگود معکوس                                                              ١٠٤

٥-٤-٥) مدل وابسته به نرخ کرنش                                                                    ١٠٦

٥-٥) الگوریتمهای حل مسائل غیرخطی                                                                    ١٠٦

۵-۵-١) الگوریتم کنترل بار                                                                             ١٠٨

۵-۵-١-١) الگوریتم افزایشی ساده                                                          ١٠٨

۵-۵-١-٢) الگوریتم کنترل بار نیوتن رافسون                                          ١١٠

۵-۵-١-٣) الگوریتم مختلط برگان                                                          ١١١

۵-۵-٢) الگوریتم کنترل تغییر مکان                                                                  ١١٢

۵-۵-٣) الگوریتم کنترل طول قوس                                                                   ١١۵

۵-۵-۴) الگوریتم کنترل کار                                                                            ١١۶

فصل ششم : مدلها و نتایج تحلیلی                                                                             ١٢٠

۶-١) مقدمه                                                                                                        ١٢٠

۶-٢) مدلهای سازه ای مورد مطالعه                                                                         ١٢٠

۶-٣) مدلسازی رایانه ای                                                                                       ١٢٢

۶-٣-١) مدلسازی اثر پیچش                                                                            ١٢٢

۶-٣-٢) تحلیل P-У                                                                                       ١٢۵

٦-٣-٣) نحوه مدل سازی غیرخطی سازه ها در این مطالعه                                       ١٢٥

٦-٣-٣-١) خصوصیات مفاصل                                                              ١٢٥

٦-٣-٣-٢) خصوصیات مفاصل استفاده شده در این پژوهش                           ١٢٨

۶-٣-۴) شتابنگاشتهای ورودی در تحلیل غیرخطی                                                ١٣٢

۶-٣-۵) روش محاسبه δ و  V                                                                      ١٣٣

y            y

۶-۴) نتایج تحلیلها                                                                                                ١٣۴

۶-۴-١) شکلها و پریودهای مودی سازه ها                                                           ١٣۴

۶-۴-١-١) بررسی نتایج شکلها و پریودهای مودی سازه ها                           ١۶٠

۶-۴-٢) منحنیهای  برش پایه - تغییر مکان                                                           ١۶١

۶-۴-٣) تغییر مکانهای حد جاری شدن (Dy)                                                       ١٨۶

۶-۴-٣-١) بررسی نتایج تغییر مکانهای حد جاری شدن                                ٢٢٣

۶-۴-۴) برش پایه حد جاری شدن (Vy)                                                             ٢٣٨

۶-۴-۴-١) بررسی نتایج برش پایه حد جاری شدن                                      ٢۴٩

۶-۴-۵) سختی الاستیک (Ke)                                                                          ٢۵۶

۶-۴-۵-١) بررسی نتایج سختی الاستیک                                                   ٢٩٧

۶-۴-۶) شکل پذیری تقاضا μ                                                                          ٣١٢

۶-۴-۶-١) بررسی نتایج شکل پذیری تقاضا                                               ٣۴٠

۶-۴-٧) تغییر مکانها و دورانها در ٠٫٠۵g و ٠٫٣g                                              ٣۵۵

۶-۴-٧-١) بررسی نتایج تغییر مکانها و دورانها در ٠٫٠۵g و ٠٫٣g               ٣٧٧

فصل هفتم : نتیجه گیری                                                                                         ٣٨٠

فهرست مراجع                                                                                                    ٣٨٣

چکیده انگلیسی                                                                                                    ٣٩١ 

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