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Articles by M.P. Anwar
Total Records ( 2 ) for M.P. Anwar
  Algorafi M.A. , A.A.A. Ali , M.S. Jaafar , I. Othman , M.P. Anwar and R. Rashid
  Externally Prestressed Segmental (EPS) concrete box sections are widely used in the construction of bridge structures today. EPS concept has become an attractive tool for rehabilitation and strengthening of existing bridges which have insufficient strength and/or excessive deflection and cracking. Problem statement: EPS bridges are affected by combined stresses (bending, shear, normal, and torsional) at the joint interface between the segments. However, very limited researchers studied this type of bridges under combined stresses. Approach: This paper presented an experimental investigation of the structural behaviour of EPS bridge with shear key under torsion. Four beams were tested, each containing three segments that were presetressed using two external tendons. A parametric study of two different external tendon layouts as well as different levels of torsional force applied by different load eccentricities was conducted. Results: The effect of torsion was evaluated in terms of vertical deflections, concrete and tendon strains, failure loads and failure mechanisms. It was concluded that torsion has a significant effect in the structural behaviour of external prestressed segmental box girder beams. Torsion not only alters failure load of the beam but also changes the type of failure mechanism. It was also investigated that harp tendon layout results in better structural behaviour in term of deflection and tendon strain as compared with the straight tendon. Recommendations: It recommended including the effect of joint (flat and shear key) type as well as the effect of tendon layout under torsion to obtain comprehensive behavior of EPS bridge.
  M.Z. Hossain , S.M.A. Hossain , M.P. Anwar , M.R.A. Sarker and A.A. Mamun
  An experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh from July to December, 2001 to study the performance of BRRI Dhan 32 in SRI and conventional methods and their technology mixes. The experiment was laid out in a split-plot design with three replications. The treatments used in the experiment consisted of (A) two planting methods viz., i) SRI planting method and ii) conventional planting method, (B) two types root placement e.g., i) J shape and ii) L shape and (C) three sources of fertilization viz., i) chemical fertilizer (N-60, P2O5-40, K2O-40, S-10, Zn-5 kg ha-1, respectively) ii) organic fertilizer (cowdung, 10 t ha-1) and iii) 50% chemical fertilizer + 50% organic fertilizer. Grain and straw yields were the highest (5.6 and 5.98 t ha-1, respectively) in SRI planting method. The highest grain yield of SRI planting method was mostly the outcome of higher total number of tillers hill-1, highest panicle length and highest number of grains panicle. Conventional planting method produced the lowest grain and straw yields (3.65 and 4.29 t ha-1, respectively). Among root placement methods L shape root placement found to be better and produced higher grain yield (4.97 t ha-1). Fertilization with 50% chemical fertilizer + 50% organic fertilizer performed the best regarding both grain and straw yields. The highest grain yield (5.04 t ha-1) and straw yield (5.67 t ha-1) were produced when 50% chemical + 50% organic were applied while the lowest ones were recorded in chemical fertilizer.

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