The paper provides a thorough examination of the impact of COVID-19 on increasing the cost of the construction project. The pandemic of COVID-19 had disrupted the financial and operational of the construction industry. Many projects have been closed and suspended, and this situation has caused great uncertainty in the construction industry. Even though the Instruction of the Minister of Public Work No. 2/2020 issued March 27, 2020, stated that construction activities in Indonesia could continue work. However, it still believes COVID-19 can lead to poor project cost performance. The study used a literature review to explore the factors contributing to the increase in project cost. A case study in the hotel construction project is used to test the factors. The research found six factors have a frequency of occurrence for each cause of cost overrun, namely labor, material, implementation time, project financial aspects, estimated cost, and occupational health and safety. The case study’s two factors are not the cause of the cost overrun based on the interviewee’s answer: heavy equipment and overhead. This paper also explains the mechanism to address cost overrun continue in construction work.

Pada studi ini dilakukan analisis terhadap kinerja struktur beton bertulang 4 lantai dengan variasi penempatan bracing inverted V. Analisis dilakukan dengan perangkat lunak ETABS V9.7.1 Hasil analisanya akan dibandingkan struktur beton bertulang tanpa bracing dengan struktur beton bertulang yang diberi variasipenempatan bracing. Melalui studi ini dilakukan analisis perbandingan displacement, daktilitas, dan kinerja struktur pada bangunan beton bertulang 4 lantai. Berdasarkan hasil analisis dapat diambil kesimpulan bahwa perkuatan dengan bracing mampu mengurangi nilai displacement, dan daktilitas struktur beton bertulang. Penurunan bracing mengurangi periode struktur bangunan, pengurangan nilai displacement pada arah X sebesar 1.328%-42.013%, arah Y sebesar 10.00% -39.394%. Nilai daktilitas struktur mengalami peningkatandibandingkan dengan gedung tanpa perkuatan bracing. Taraf kinerja struktur bangunan aman. Hal ini menunjukkan bahwa penggunaan bracing dapat meningkatkan kekakuan, kekuatan dan stabilitas struktur.Kata kunci : struktur beton bertulang, kinerja, daktilitas.

Suatu bangunan memiliki ketahanan yang baik terbuat dari struktur beton bertulang dapat diamati daristruktural bangunan itu sendiri. Salah satu komponen struktural yang paling berpengaruh dalam keruntuhan suatu bangunan adalah sambungan balok-kolom. Keruntuhan bangunan tersebut, khususnya bangunan gedung beton bertulang adalah akibat kerusakan dari sambungan balok-kolom yang merupakan bagian struktur yang terpenting pada bangunan. Pada penelitian ini dilakukan untuk mengevaluasi perilaku geser balok pada sambungan balok-kolom beton bertulang dengan 3 variasi rasio tulangan balok BCJ-2 (ρ=0.0067), BCJ-3 (ρ =0.010) dan BCJ-5 (ρ =0.0167) serta mengetahui besarnya beban pada saat retak awal (first crack), dan beban saat runtuh. Dari hasil yang diperoleh pada penilitian ini adalah semakin besar rasio tulangan yang digunakan maka semakin besar beban yang dapat ditahan balok. Pengaruh adanya variasi rasio tulangan dapat meningkatkan kapasitas baloknya, baik pada pakai sengkang maupun tanpa sengkang. Dimana BCJ-S 5 adanya peningkatan kapasitasnya sebesar 25,49% dari BCJ-TS 5, sedangkan BCJ-S 3 dengan BCJ-TS 3 dan BCJ-S 2 dengan BCJ-TS 2 yang tidak begitu menunjukan peningkatan yang signifikan. Dari keenam benda uji, satu mengalami keruntuhan lentur dan lima mengalami keruntuhan geser.Kata kunci : sambungan balok kolom, rasio tulangan, beban, kapasitas geser, keruntuhan geser.

Dalam kasus analisis material kondisi non-linear, modulus elastisitas hanya titik definisi pertama dari sebuah perilaku secara keseluruhan. Definisi dan analisis dalam kasus material kondisi non-linear melibatkan salah satu dari perilaku pasca leleh (plastik). Solusi numerik dari jenis masalah non-linear melibatkan pendekatan segmen non-linear pada kurva tegangan-regangan dengan serangkaian potongan segmen linier. Setiap segmen linier didekati dengan modulus tangen (ET) yang dihitung sebagai rasio tegangan dengan regangan untuk segmen baris tertentu. Perbandingan antara material kondisi linear dengan kondisi non-linear menunjukkan bahwa hasil analisis menggunakan model material non-linear memberikan hasil cukup berbeda dibandingkan model material linear. Hasil ini juga menunjukkan adanya pengaruh perubahan nilai modulus elastisitas (E) pada matriks kekakuan elemen dalam analisis. Dimana untuk model material non-linear adanya modulus elastisitas tangent (ET) yang berpengaruh dalam analisis permodelan respon non-linear pada elemen.Kata kunci : model material linear, model material non-linear, modulus elastisitas (E), modulus elastisitastangent (ET).

Cold-formed steel has been used widely on buildings, especially for the roof truss-structures. This material and its typical section are beneficial in weight and strength. Despite the minimum total weight, the structure can fulfil the strength requirement. For the truss installations, screws are commonly used to join the truss members due to time consideration and convenience process. However, there is a potential failure using the screw because it does not have a nut to prevent it from detaching. In this research, experimental tests of the screw connection of the cold-formed steel were conducted. The specimens consist of two groups: 8 specimens using screws were applied in the same direction and the other 8 specimens in the opposite direction. A different application of screws was aimed to observe the effect of the screw’s head, which may play a role as a nut to prevent detaching. Typical conditions of tilted screw and indented hole on the joined channel section were found during the test. The experimental results showed that the ultimate load for two different directions of screw were slightly different within the range of 0.4 – 10.0 %. The effect of the screw’s head position was minor to the resistance of the connection.

This study aims to describe the effectiveness of the use of instructional videos for the Earthquake Engineering course in the Civil Engineering Department, Andalas University. The method of making videos is by editing files using Camtasia Studio. Students who are the target of learning are students in the seventh semester of the Andalas University Civil Engineering Department. The use of learning video-based learning media is to anticipate the impact of the Covid 19 pandemic that is currently hitting. With the making of this video, it is hoped that the learning outcame from the Earthquake Engineering course can still be achieved. The analysis of the use of video in the learning process was carried out by distributing questionnaires after the video was uploaded through Ileran Andalas University. As for the responses from students using the video, 87% stated that during this pandemic, they agreed to use Ilearn as a learning tool or also function as their classroom. Furthermore, 88% of them stated that they prefer files in the form of videos as learning media even though they can also receive learning files in the form of PPT and PDF files. However, they do not like online lectures as a learning medium. Furthermore, they stated that 94% felt the benefits of the video provided. Furthermore, 66% of students appreciated the accuracy of the video topic with the lecture material, but they stated that the quality of the video still did not get high appreciation. Hopefully this can be a reference for making instructional videos on other topics and objects.

Horizontal asymmetries in buildings can cause the building to experience torsion when receiving lateral loads where the earthquake load is one of the lateral loads. In this study, analyses of structures that have horizontal asymmetry is carried out in the form of structures with a T layout. To eliminate the torsional effect on buildings due to earthquake loads, the structures are dilated so that the structures are analyzed into two buildings with the purpose of they become two symmetrical buildings (Models 2 and 3). Time history response analysis was performed to assess whether there was an impact on the structural elements around the dilatation. The most significant result in model 1 is when the first mode of the structure rotates. Meanwhile, after being given dilatation, the two separate structures have moved in translation in mode 1 and 2. The deviation between floors in each model does not exceed the allowable deviation between floors. The building experienced pounding at 21.63 seconds, but this can be overcome by the separation of the structure (dilatation). The planned dilation distance is 70 mm.

Disaster preparedness from the builder is crucial due to the increase of earthquake vulnerability in Padang City. To ensure that the house is built following the concept of an earthquake-resistant non-engineered house must be followed in building the house to secure and minimizes the risk of casualties and losses caused by the earthquake. Previous experience shows that technical factors are not enough to increase the awareness of the builders. It requires non-technical factors that may play a significant role in disaster reduction in the community. That is why this study intends to identify builder perception about indicators of earthquake-resistant non-engineered house development and its implementation in the field. Questionnaires are used to gather the data to 30 housing projects in Padang City. In general, all statements about the concept of earthquake-resistant houses are strongly considered by the builders. However, it does not implement in the field run smoothly. Many construction practices found did not meet the principles. Government and stakeholder participation are needed to enhance the competency and knowledge of the homeowners and builders.