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VOLUME XVII Edisi 1 , Januari 2012
ANALISIS PERKIRAAN LENDUTAN SEKUNDER PADA BALOK BETON BERTULANG DENGAN MODEL REOLOGI |
1)Jurusan Teknik Sipil Universitas Kristen Immanuel Yogyakarta e-mail : harianja_andar@yahoo.com 2)Alumni S1 Teknik Sipil Fakultas Teknik Universitas |
Deflection can cause degradation of floor, hallow roof level, and vibration at building. Long term deflection periodically, difficult reckoned because influence by many factor, one of them which bot be reckoned in formulas of deflection that time factor. Rheologi model tried to applicated at reinforced concrete beam, so that load test done to a reinforced concrete beam of the size 8 cm 12 cm 200 cm which its deflection measured by using of dialgauge. Value of deflection converted into strain values with method analysed inertia, that converted into value strain rate with time root, and analysed in regretion model to get logarithm value of b, A, and R. Logarithm value of b, A, and R used to calculate empirical parameters of a, b, and . By got of empirical parameters a, b, and , so the beam strain to certain time can be predicted with reologi model. Primary and secondary deflection can be estimated with model of rheologi after first load so it is with secondary defelction at second loaded. If usage of straingauge was imposible so diagauge can be used as alternative, and strain of test object can be calculated with method analyse inertia. Correlation coefficient (R) between strainrate with time root is equal to 0,999. To each same time interval, secondary deflection was not constant. |
deflection, strain, rheologi. |
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