Lismar Rusli
Jurusan Teknik Sipil Politeknik Negeri Padang

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Peningkatan Efektifitas Hasil Pembelajaran Pada Mata Kuliah Matematika Dan Statistik Dengan Tugas Terstruktur Dan Tugas Kreativitas Riswandi, Riswandi; Rusli, Lismar
REKAYASA SIPIL Vol 6, No 2 (2010)
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Conventional teaching methods for this (Lecturer to teach more dominant activity) in the low quality of student learning outcomes in the subjects of Mathematics and Statistics department of civil engineering at Polytechnic University of Andalas (from 4 years of data subjects of Mathematics and Statistics (2005/2009)). This research aims to improve student learning outcomes in the subjects of Mathematics and Statistics by applying methods of structured tasks and assignments creativity. This research was conducted based on data from 4 years (2005/2009), the target indicator improved student learning outcomes expected. With the implementation of the assignment method successfully structure and creativity improve student learning outcomes with learning outcomes to achieve grade A increased from 3.8% to 15.6%, less learning outcome category (D value) can be reduced from 13.07% to 3, 7 % and the index of average student achievement increased in the subjects of Mathematics and Statistics from 2.24 to 2.87.
Sifat Dinding Batafoam Dengan Tulangan Horizontal Dan Beban Tetap Army, Buyung; Rusli, Lismar; Rasyid, Effendi
REKAYASA SIPIL Vol 3, No 1 (2007)
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Perencanaan gempa pada suatu bangunan sering dilakukan hanya pada bagian struktural tapi melupakan adanya bagian non – struktural, seperti dinding. Perencanaan gempa pada dinding dicari alternatif bahan bangunan yang tingkat daktilitasnya cukup. Penelitian ini akan melihat karakteristik dinding dengan pengisi batafoam. Batafoam yang relatif ringan dibandingkan material biasa akan lebih menguntungkan bagi bangunan karena dengan berat sendiri yang ringan otomatis beban gempa juga menjadi kecil dan untuk perencanaan pondasi serta komponen struktur lainnya menjadi kecil. Untuk mengetahui perilaku model kerusakan dinding batafoam yaitu meliputi pola retak, hubungan beban – simpangan, kekakuan geser global ( global shear stiffness ), kuat geser ultimit ( ultimate shear strength ) dan daktilitas serta untuk mengetahui pengaruh perkuatan tulangan horizontal pada dinding batafoam, maka dilakukan penelitian terhadap portal beton bertulang dengan pengisi pasangan dinding batafoam dengan pembebanan statis. Dalam penelitian ini digunakan tiga model struktur rangka beton bertulang sederhana dengan berbagai variasi yaitu satu buah portal terbuka ( open frame, OF ), satu buah dinding pengisi batafoam ( infilled batafoam, IB ) dan satu buah dinding pengisi batafoam dengan tulangan horizontal Ф 6-200 ( infilled batafoam with horizontal bars, IBHB-200 ). Dari hasil penelitian, penambahan tulangan horizontal Ф6-200 pada pasangan dinding batafoam, meningkatkan kapasitas beban ( load ), meningkatkan simpaman ( displacement ), meningkatkan kuat geser ultimit dan meningkatkan energi yang diserap sebelum runtuh, dapat digunakan pada semua wilayah gempa. Pola keruntuhan yang dominan pada dinding batafoam adalah keruntuhan sliding along bed joints stairtstep thruogh joints. Sedang pada open frame, bebannya relatif kecil, displacement yang terjadi besar dengan tingkat daktilitas yang besar, kerusakan terjadi pada joint antara balok dan kolomnya
Efek Dari Tegangan Awal Tulangan Tarik Dan Temperatur Tinggi Pada Retak Beton Army, Buyung; Rusli, Lismar; Apwiddhal, Apwiddhal
REKAYASA SIPIL Vol 2, No 2 (2006)
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Strength of Structure decreased due to fire exposure. This strengrth was affected by type and depth of crack, heat variation and fire duration- The deeper the crack, the higher the reduction of strength of the structure as a whole, because the convection of heat arrived on the steel reinforcement faster than the conduciion lhe steel yielded faster. This research was conducted by making 30 specimens of standard concrete cylinder with 150 mm diameter and 300 mm long and 26 specimens of concrete cylinder with 60 mm diameter and 40O mm long. The steel bar was anchored in the middle of the cross sec{ion of the later cylinders. The bar dimension of ,l3 mm diameter was reduced to 10 mm in 100 mm long, positioned at 150 mm from the concrete cylinder ends. ln this research there were 2 kinds of concrete strength used, which is 22,5 MPa and 40 MPa. The peripheral surface of 60 mm diameter of concrete cylinder was heated in the electrical heater at various temperature up to 750 °C for 1,5 hours and pulled axialty to certain stresses during heating. The research included concrele modulus of elasticity, crack width due to heating, effect of.heating temperature to the steel bar. The results indicate that static modulus of elasticity (employing SNI formula) is 8-25 % higher than that using B.C CP 110. By comparing the research results (obtained from stress-strain relationship curve) it is indicate that static modulus of elasticity is 1G 25 % higher than to the B.C CP110. Test results also indicate that concrete is vumerable to crack under high temperature. The averages of 3 cracks of the concrete are 1,61, 0,64, 0,55 and 0,75 mm for 100%Pcr, 80 %Pcr, 60%Pcr and 40%Pcr respectively for concrete compressive strength of 22,5 MPa, while such cracks are 1,30, 1,24, 0,96 and 0,83 mm for 40MPa. The crack widths are above allowable crack width for interior and exterior structures by 121,18% and 168,10% respectively tor 22,5 MPa concrete specimers and 170,83% and228,28% respectively for 40 MPa concrete. The elongation of specimens of 100%Pcr loading is sQnificant compared to below 100%Ps loading. Steel bar elongations for 80o/oPcr, 607oPcr, 40%Pcr are 12,9%, 9,70%, 8,36% respectively tor 22,5 MPa cornpared to 100% Pcr, while for 40MPa concrete this elongations are 96,87% 13,98% and 9,29% respectively.  
Tudy Eksperimental Tentang Penambahan Abu Ampas Tebu Terhadap Kinerja Beton Normal ; Tinjauan Terhadap Kekuatan Tekan Satwarnirat, Satwarnirat; Aguskamar, Aguskamar; Rusli, Lismar
POLI REKAYASA Vol 2, No 1 (2006)
Publisher : POLI REKAYASA

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Concrete is the material that is basically as an important thing in a modern social life. Almost all of the daily life aspects much depend on the concerte, either as a direct or indirect aspects. Nowadays, the importence of concrete can be seen clearly in our real life especially in the building construction. There are more factories are built in many provinces in Indonesia and that is one of the indications that the capacities of our production also increase. Based on the inceasing need of the concrete, there is an alternative offered in this research by using the waste of sugar-reed instead of cement. The main reason is that the cost of cement has much been increased since the last few years. The purpose of this research is to compare the strength of the pressure for the concrete that has been added or mixed by the waste of sugar-reed. Besides, the importance of this research is also to prove that the composition of the mixed waste sugar-reed concrete can influence the strength of the pressure for the concreate than those of concreate with the less mixture of the waste of sugar-reed. Based on the research findings, it can be concluded that the greater strengthens of the additional waste sugar-reed concrete can be found on the concreate of 20% for the waste sugar-reed at the age of 28 days and the for having the strength at 40,365 Mpa, but for those concrete without adding the waste sugar-reed it is only at 34,753 M