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ANALISIS PERKUATAN STRUKTUR KERANGKA BANGUNAN BERTINGKAT TERHADAP BEBAN GEMPA DENGAN INFILLED FRAME Pascanawaty, Maya Saridewi; Ernawati, Agustini
Jurnal Ulul Albab Vol. 24 No.2 (2020): Juli
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jua.v24i2.5840

Abstract

Dinding pengisi pada umumnya dianggap sebagai elemen nonstruktural dalam struktur rangka terbuka yang dalam pemasangannya dilakukan setelah struktur utama balok, kolom, dan pelat selesai dipasang. Akibatnya dalam proses desain, dinding pengisi seringkali diabaikan. Dalam berbagai kasus, bila ada beban gempa yang besar, dinding pengisi memberi sumbangan yang besar terhadap kekakuan dan kekuatan struktur. Penelitian ini mengambil contoh gedung pertokoan yang dianalisa dalam empat model yaitu Model 1 struktur tanpa adanya dinding pengisi (open frame), Model II struktur dengan dinding pengisi sebagai shell element, Model III struktur dengan dinding pengisi sebagai ekivalen diagonal strut. Model IV struktur dengan dinding pengisi sebagai shell element dan penambahan kolom. Parameter pembanding adalah gaya-gaya dalam, kekakuan, dan deformasi struktur. Berdasarkan hasil analisa, Model II 19 % lebih kaku dibandingkan dengan Model I, Model III 100 % lebih kaku dari Model I dan Model IV, 9 % lebih kaku dibandingkan Model I ditinjau dari gempa arah X. Model II, 95 % lebih kaku dibandingkan Model I, Model III 22 % lebih kaku dari Model I, dan Model IV 78 % lebih kaku dibandingkan Model I ditinjau dari gempa arah Y. Nilai momen dan gaya lintang Model II, Model III, Model IV relatif lebih kecil dibandingkan Model I. Berdasarkan hasil analisa, dengan adanya penambahan kolom pada struktur gedung (Model IV) tegangan yang terjadi pada dinding pengisi menjadi semakin kecil. Dari segi keamanan, infilled frame jauh lebih aman dibandingkan dengan open frame dan sangat memenuhi syarat untuk digunakan pada daerah yang beresiko gempa tinggi. Abstract: Infill walls are generally considered a non-structural element in an open frame structure which is installed after the main structures of beams, columns and slabs have been installed. As a result, in the design process, infill walls are often neglected. In many cases, when there is a large earthquake load, the infill wall contributes greatly to the stiffness and strength of the structure. This study takes an example of a shopping building which is analyzed in four models, namely Model 1 structure without infill (open frame), Model II structure with infilled walls as the shell element, Model III structure with infilled walls as the equivalent of a diagonal strut. Model IV structure with infill walls as shell elements and additional columns. The comparison parameters are internal forces, stiffness and deformation of the structure. Based on the analysis, Model II is 19% stiffer than Model I, Model III is 100% stiffer than Model I and Model IV, 9% is stiffer than Model I in terms of the X direction earthquake. Model II, 95% stiffer than Model I I, Model III is 22% stiffer than Model I, and Model IV is 78% stiffer than Model I in terms of the Y direction earthquake.The moment values and latitude of Model II, Model III, Model IV are relatively smaller than Model I. Based on the results analysis, with the addition of a column in the building structure (Model IV) the stress that occurs in the infill wall becomes smaller. In terms of safety, infilled frames are much safer than open frames and are highly qualified for use in high earthquake risk areas
Comparative Study of the Compressive Strength of SCC with Sika ViscoCrete 3155N and Sika SIKACIM Concrete using Destructive Testing Azani, Ahmad Ali; Hariyadi, Hariyadi; Hamdani, Hafiz; Pascanawaty, Maya Saridewi
Journal La Multiapp Vol. 6 No. 5 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i5.2461

Abstract

Self-Compacting Concrete (SCC) is one of the key innovations in modern concrete technology, offering the ability to flow and fill formwork automatically without the need for mechanical compaction, made possible through the use of specialized chemical admixtures. This self-flowing property is derived from the high deformability of fresh concrete. To assess these characteristics, a slump flow test is conducted to evaluate the concrete’s ability to spread under its own weight. This study focuses on the uniformity of compressive strength in SCC incorporating two different types of admixtures. The concrete specimens were cylindrical, with a diameter of 15 cm and a height of 30 cm. Two types of superplasticizers SIKA ViscoCrete 3155N and SIKA Sikacim Concrete were used in the SCC mixtures for each sample group. Subsequently, the uniformity of the concrete was evaluated through destructive testing, specifically compressive strength testing, to determine the resulting compressive strength values. Based on the compressive strength tests conducted at 3 days of age, the following average values were obtained: the control (normal) concrete yielded an average compressive strength of 15.14 MPa; the SCC with 0.8% SIKA ViscoCrete 3155N achieved an average strength of 21.04 MPa; while the 2% dosage of the same admixture resulted in a lower average strength of 11.68 MPa. For SCC with 1% SIKA Sikacim Concrete, the average compressive strength was 12.78 MPa, and at 2% dosage, the average strength was 13.38 MPa.
Comparative Analysis of the Support Capacity and Settlement of Bored Pile Foundations Using Manual Methods and Allpile Software: Case Study Hidayatulloh, Syarif; Pascanawaty, Maya Saridewi; Hamdani, Hafiz; Fitrayudha, Adryan
Journal La Multiapp Vol. 6 No. 6 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i6.2530

Abstract

Foundations are structural elements that function to bear the load of a building and transfer it to the ground to a certain depth. Foundations must be designed so that the transferred load does not exceed the bearing capacity of the soil, as this can cause excessive settlement and lead to structural collapse. The purpose of this study is to determine the comparison of bearing capacity and settlement of bored pile foundations in the Poltekkes Kemenkes Mataram building using two approaches: the manual method and the Allpile software. The analysis was conducted based on secondary data obtained from the Detailed Engineering Design (DED), results of the Standard Penetration Test (SPT), and laboratory soil test results. The results of the manual Meyerhof method yielded an ultimate bearing capacity of 13,127.79 kN and a single pile settlement of 0.0455 m. The manual Reese and Wright method yielded an ultimate bearing capacity of 2,697.3453 kN and a single pile settlement of 0.0241 m. Meanwhile, the Allpile software calculation yielded an ultimate bearing capacity of 14,391.891 kN and a single pile settlement of 0.0027 m. All settlement values, both for single piles and groups, remain below the maximum permitted limit.