000			04340nam a22003017a 4500
003			OSt
005			20250107152401.0
008			250107b |||||||| |||| 00| 0 eng d
040			_aTUPM _bEnglish _cTUPM _dTUPM _erda
050			_aBTH TA 145 _bM37 2023
100			_aMarcos, Mariniell G. _eauthor
245			_aStability analysis of low-rise building on isolated footings affected by liquefaction-induced settlement during earthquakes: _ba plaxis 3D study across varied magnitudes/ _cMariniell G. Marcos, Jade Allyson P. Pelayo, and Hannah Grace D. Piamonte .--
260			_aManila: _bTechnological University of the Philippines, _c2023.
300			_axiii, 143pages: _c29cm. _e+1 CD-ROM ( 4 3/4in.)
336			_2rdacontent
337			_2rdamedia
338			_2rdacarrier
500			_aThesis (undergraduate)
502			_aCollege of Engineering .-- _bBachelor of Science in Civil Engineering: _cTechnological University of the Philippines, _d2023.
504			_aIncludes bibliography:
520			_aDue to its location in the Pacific Ring of Fire, the Philippines has always anticipated potential destructive earthquakes that could severely damage important structures like schools. The City of Manila is highly susceptible to liquefaction, making any structures built on its soil vulnerable to liquefaction-induced settlement brought on by earthquake loads. This study employs to analyze and showcase the variance in settlement of the underlying soil and foundation of a low-rise school structure in the highly liquefaction- prone soil of Manila under various earthquake loads. It does this by using the FEM software, PLAXIS 3D. The methodology is divided into two distinct categories: empirical analysis using manual calculation and numerical analysis using software. By considering the foundation weight, structural loads, and all three loads—including the various earthquake loads—the FEM analysis is used to calculate the settlement of soil and foundation. The empirical analysis is used for the settlement using the three loads used in PLAXIS 3D and the differential settlement and angular rotation, which was used to evaluate the stability of the structure using Preene's stability criteria. In the evaluation using Preene's stability criteria, the angular rotation of 1/300 and differential settlement of less than 2 cm falls only under the slight risk criteria, which implies that the damage in the building will only be limited to cracks of 1 mm in maximum width and no significant structural damage. The PLAXIS 3D results show that the foundation's self-weight settlement is 5.472 mm and that the maximum total displacement in the foundation results from the structure's gradual consolidation over time—is 22.25 mm when the point load from the structure's dead load is applied. The different earthquake loads were added using the same model of the soil foundation and structure under the point load from the structure's vi dead load and the extracted time and acceleration data in cm/sec2 from the SeismoSignal time-acceleration input of the earthquake event data. The maximum total displacement along the foundation due to earthquake data with magnitudes of 5.1, 6.5, and 7.0 is 22.28 mm, 22.37 mm, and 22.38 mm, respectively. In comparison to the empirical analysis using manual computation, show the differential settlments for the magnitudes 5.1, 6.5, and 7.0 earthquakes to be differential settlement of 21.170 mm, 21.186 mm, and 21.287 respectively. The angular rotation based on the manual computation using differential settlement is 8.019x10-4, 8.025x10-4, and 8.063x10-4 listed respectively for the three earthquake magnitudes mentioned above. The findings, derived from both empirical analysis and the Finite Element Method, showed that the settlement values as well as angular distortions do not exceed 1/500, which, following Preene's (2000) building damage criteria, falls into the slight risk category which suggests the possibility of superficial damage with no significant effect to the structural integrity of the building.
650			_aCivil engineering
650			_aLiquefaction
650			_aEarthquakes
700			_aPelayo, Jade Allyson P. _eauthor
700			_aPiamonte, Hannah Grace D. _eauthor
942			_2lcc _cBTH COE _n0
999			_c29200 _d29200