تقييم الاثر البيئى لمقترح مشروع المدينه المليونيه بشرق التفريعه ببورسعيد باستخدام تقنيات الاستشعار من البعد ونظم المعلومات الجغرافيه
.أحمد منير محمد بهى الدين;
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| Title | تقييم الاثر البيئى لمقترح مشروع المدينه المليونيه بشرق التفريعه ببورسعيد باستخدام تقنيات الاستشعار من البعد ونظم المعلومات الجغرافيه | Other Titles | The thesis aimed to investigate the effect of unbalanced moment on punching shear capacity of high strength concrete slab-column connections. The main objectives of this research were to investigatethe effect of concrete compressive strength on the slab-column connection capacity, also tostudy the effect of changing the steel ratio for specimens on the slab-column connection capacity anddetermination of the shear contribution in the transmission of the unbalanced moment to the columns. The research consisted of experimental and analytical studies. Based on the results of experimental program and adopted analytical models, the behaviorof slab-column connections to transfer unbalanced moment for high strength concrete under vertical loading was investigated.Modes of failurepredicted ultimate capacity of slab-column connections for different steel ratios(µ) and different concrete compressive strength (fcu) and the applicability of the design equations given in the Egyptian code for the design of HSC connectionsintroduced. A comparison with different code provisions & analytical models were also presented.3-D strut & tie model was developed to predict the cracking loads of the tested specimens The experimental program consisted of testing six RC slab-column connections with overall slab dimension 600 mm width,100mmdepth and 1000 mm length. The variables introduced in the tested specimens were as follows: 1. Concrete compressive strength (fcu): compressive strengths of 30, 50 and 80 MPa were used. 2. Steel ratio (µ): steel ratio of 0.75% for specimens S1, S3 and S5, steel ratio of 1.25% for specimens S2, S4 and S6. The analytical phase of this study also included a strut and tie analysis to predict cracking load at slab-column connections due to transfer of unbalanced moment for high strength concrete under vertical loading. | Authors | .أحمد منير محمد بهى الدين | Issue Date | 2014 |
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