Disertasi ini membentangkan hasil analisis pada sambungan kerangka portal eave haunch dengan dan tanpa bahagian berongga. Sambungan ini telah dimodelkan sebagai sambungan tegar. Perisian LUSAS 14.3 telah digunakan untuk pemodelan dan menganalisis model dengan unsur tidak linear. Kajian ini dilakukan adalah untuk menentukan momen putaran, agihan tegasan, dan corak kegagalan sambungan. Keputusan yang terhasil telah digunakan untuk membandingkan antara model eave haunch dengan dan tanpa bahagian berlubang. Hasil keputusan lebih memberikan tumpuan kepada perbezaan momen putaran, agihan tegasan dan corak kegagalan antara kedua-dua model. Berdasarkan keputusan yang diperolehi, momen rintangan untuk kedua-dua model ini adalah hampir sama tetapi nilai putaran untuk keratan eave haunch yang berlubang adalah lebih tinggi daripada keratan eave haunch tanpa berlubang. Perbezaan peratusan nilai putaran antara kedua-dua model adalah 40%. Daripada gambar kontour tegasan, agihan tegasan dan tekanan kritikal dapat dikenal pasti dengan jelas. Ia menunjukkan bahawa agihan tegasan pada sambungan kerataan eave haunch tanpa kerataan berlubang lebih sekata daripada sambungan kerataan eave haunch dengan kerataan berlubang. Tekanan yang kritikal berlaku pada sambungan kerataan eave haunch tanpa kerataan berlubang juga lebih rendah daripada sambungan dengan keratan berlubang. Perbezaan peratusan tekanan kritikal adalah 3%. Ini bermakna kerangka portal eave haunch dengan keratan berlubang adalah lebih mudah untuk berputar berbanding keratan tanpa berlubang apabila beban yang dikenakan adalah sama. Perbandingan corak kegagalan telah dikenal pasti dan didapati bahawa mod kegagalan antara dua model tersebut adalah sama antara satu sama lain iaitu tiang dan kasau mengalami lenturan apabila beban yang dikenakan kepada bebibir atas kasau.
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This dissertation presented the result of analysis on portal frame eave haunch connection with and without perforated section. This connection was modelled as rigid connection. LUSAS 14.3 software has been used for modelling with nonlinear analysis. The purposes of this study were to determine the moment rotation, stress distribution, and failure pattern of the connection. The results were used to compare between two models which were eave haunch with and without perforated section. The results focus more on the difference of moment rotation, stress distribution and failure pattern between the two models. Based on the results, the moment resistance for the two models were almost the same but the rotation value for eave haunch that had perforated section was higher than eave haunch that without perforated section. The percentage difference of rotation between both models is 40%. From the contour stress diagram, the stress distribution and critical stress could be identified clearly. The results showed that the stress distribution at portal frame eave haunch connection without perforated section was more evenly than the connection with perforated section. Subsequently, the critical stress occurred at portal frame eave haunch connection without perforated section has also lower than the connection with perforated section. The percentage difference of the critical stress was calculated to be 3%. In other words, the portal frame eave haunch connection with perforated section is easier to rotate than without perforated section when the applied load is the same. The comparison of failure pattern had been identified and realised that the failure modes of the two modal were similar to each other which the column and rafter experienced bending when the loading applied to the top flange of the rafter.
The behaviour of portal frame eave haunch connection with and without perforated section / Low Pei Leong