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Stiffness-Factor Modifications

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Stiffness-Factor Modifications Three cases where moment-distribution process can be simplified 1. Member Pin (or Roller) Supported at Far End carry-over factor = 0 if the far end was fixed supported, the stiffness factor K = 4EI/L would have to be modified by 3/4 to model the case of having the far end pin supported 2. Symmetric Beam and Loading for center span: the center span's stiffness factor will be one half that usually determined using K = 4EI/L 3. Symmetric Beam and Antisymmetric Loading for center span: the stiffness factor is one and a half times as large as that determined using K = 4EI/L Procedure for Analysis draw FBDs of spans and joints   determine distribution factors and fixed-end moments   (click)   identify joints  (free ends are not joints) determine stiffness factor K for each span   (click) K = 4EI/L for far-end fixed K = 3EI/L for far-end pinned or roller supported K = 2EI/L for symm...
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CIVIL ENGINEERING ALL COLLECTION

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Learning seismic

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hypo center ဆိုတာ ငလ်င္လွုပ္တဲ့ေနရာ သူရဲ႕အေပၚတည္႕တည္႕မွာ epicenter ရွိတယ္ ျဖစ္သြားတဲ့ အက္ကြဲေၾကာင္းကို faults plain လို႕ေခၚတယ္ ။ observation ကေန hypocenter and epicenter ၾကားကို dip angle လို႕ေခၚတယ္ ။ hypo center and epicenter ထိအကြာအေ၀းကို focal depth လို႕ေခၚတယ္ ။ observation ကေန epicenter ကို epicentral distance လို႕ေခၚတယ္ ။ မုိင္ ၄၀ shallow earthquake မုိင္ ၄၀ ကေန ၁၉၀ ထိဆိုရင္  intermediate earthquake မိုင္ 450 ကေနအထက္ဆိုရင္ deep earthquake လို႕ေခၚတယ္ ။ Shallow earthquakes are between 0 and 70 km deep; intermediate earthquakes, 70 - 300 km deep; and deep earthquakes, 300 - 700 km deep. In general, the term "deep-focus earthquakes" is applied to earthquakes deeper than 70 km. All earthquakes deeper than 70 km are localized within great slabs of lithosphere that are sinking into the Earth's mantle. ကမ္ဘာေျမၾကီးေအာက္မွာ ရွိတဲ့ ေက်ာက္ေတြက စြမ္းအင္ေတြကို သိမ္ထားတယ္ ။ တခ်ိန္ခ်ိန္မွာ မသိမ္းနုိင္ေတာ့ပဲ ultimate ကို ေက်ာ္ျပီးေပါက္ကြဲရာက ေျမ...
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