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All Journal Jurnal Ilmiah Teknik Sipil TEKNIK MEDIA KOMUNIKASI TEKNIK SIPIL Rekayasa Sipil Journal of Geoscience, Engineering, Environment, and Technology Journal of Advanced Civil and Environmental Engineering Civil Engineering Dimension Aceh International Journal of Science and Technology

Ay Lie Han

Civil Engineering Department, Diponegoro University, Jl. Prof. Soedarto, SH, Tembalang, Semarang 50275

Author-ID : 273763

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Environmental Science Physics

Published : 19 Documents Claim Missing Document

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Reinforced Concrete Finite Element Modeling based on the Discrete Crack Approach Sri Tudjono; Han Ay Lie; Sholihin As’ad
Civil Engineering Dimension Vol. 18 No. 2 (2016): SEPTEMBER 2016
Publisher : Institute of Research and Community Outreach - Petra Christian University

The behavior of reinforced concrete elements is complex due to the nature of the concrete that is weak in tension. Among these complex issues are the initial cracking and crack propagation of concrete, and the bond-slip phenomenon between the concrete and reinforcing steel. Laboratory tested specimens are not only costly, but are limited in number. Therefore a finite element analysis is favored in combination to experimental data. The finite element technique involving the cracks inserting is one of the approaches to study the behavior of reinforced concrete structures through numerical simulation. In finite element modeling, the cracks can be represented by either smeared or discrete crack. The discrete crack method has its potential to include strain discontinuity within the structure. A finite element model (FEM) including the concrete cracking and the bond-slip was developed to simulate the nonlinear response of reinforced concrete structures.

Proposed Design Philosophy for Seismic-Resistant Buildings Nanang Gunawan; Aylie Han; Buntara Sthenly Gan
Civil Engineering Dimension Vol. 21 No. 1 (2019): MARCH 2019
Publisher : Institute of Research and Community Outreach - Petra Christian University

Modern seismic design and technologies have undergone tremendous developments. In modern design codes, building structures subjected to high earthquake loads are allowed to experience plastic deformations without collapsing, and the design is permitted up to the ultimate strength. According to comparative results in Japan, the number of humans injured due to earthquakes is higher than the number of deaths/missing. Likewise, the number of residential buildings that collapsed are less than the partially damaged buildings. This outcome implies that residential buildings designed based on the revised seismic standards have good earthquake resistances. It also infers that the human deaths/injury casualties were not a result of the collapsed the structure, but due to the strong vibrations originated from the earthquake, yielding in the collapse of non-structural elements such as ceilings and bookshelves. This paper presents a proposed design philosophy that attempts to implement the effect of earthquakes to non-fatal human casualties

Seismic Vulnerability Assessment Using Rapid Visual Screening: Case Study of Educational Facility Buildings of Jenderal Soedirman University, Indonesia Yanuar Haryanto; Hsuan-Teh Hu; Ay Lie Han; Banu Ardi Hidayat; Arnie Widyaningrum; Prisca Evelyn Yulianita
Civil Engineering Dimension Vol. 22 No. 1 (2020): MARCH 2020
Publisher : Institute of Research and Community Outreach - Petra Christian University

Earthquakes are natural phenomena occurring in various parts of the globe. Severe earthquakes caused substantial loss of life and property when nearly populated districts. Although some progress has been made in the area of seismic prediction, earthquakes in time, magnitude or location can not be estimated correctly. The primary method of reducing casualties is therefore to build seismic resistant structures. Current earthquakes show that the old houses, which are not intended to withstand earthquakes, have been harmed rather than the structures intended according to seismic regulations. Many current structures in Indonesia were intended only without seismic provisions to withstand the gravity loads. There is a need to study these buildings' vulnerability in order to prevent a severe danger. A Rapid Visual Screening (RVS) technique is conducted in this study to determine a Final Level 1 Score, SL1, for Jenderal Soedirman University, Indonesia’s educational facility buildings. In nine constructions situated in Purwokerto and Purbalingga, the method was implemented. Moreover, the final SL1 score is an estimate of the collapse probability if an earthquake occurs with ground motions called the maximum considered earthquake targeted risk, MCER. These score estimates are based on restricted observed and analytical information, thus the probability of collapse is therefore an approximation.

An Innovation Value Chain in Project Based Companies: A Study of Indonesian Contractors Harijanto Setiawan; Ferianto Raharjo; Ay Lie Han
Civil Engineering Dimension Vol. 22 No. 2 (2020): SEPTEMBER 2020
Publisher : Institute of Research and Community Outreach - Petra Christian University

Innovation is one of the key success factors of contractors to achieve sustainable business. However, studies about innovation cannot be generalized to all business sectors. Therefore, special study about innovation that focuses on contractors in Indonesia is needed. The study is aimed to explore the process of innovation development in contractors, based on innovation value chain (IVC) approach. The qualitative analysis on the data that is collected from in depth interview with top managers of big contractors in Indonesia is carried out. This study found that innovations are generated mainly by project teams because they are involved directly in the project activities. The next phase is to test the idea of innovation in the selected projects in order to assess whether the innovation works well or not. Finally, the selected innovations will be set as a company standard and will be implemented in the subsequent projects.

Seismic Retrofitting of Irregular Pre-80s Low-rise Conventional RC Building Structures Han Ay Lie; Junaedi Utomo; Hsuan-Teh Hu; Lena Tri Lestari
Civil Engineering Dimension Vol. 23 No. 1 (2021): MARCH 2021
Publisher : Institute of Research and Community Outreach - Petra Christian University

A resilience and seismic safety evaluation method of under-qualified concrete structures designed based on codes prior to the introduction of earthquake provisions is presented. A numerical method for evaluating and improving a structure’s performance and resilience through jacketing and Carbon Fiber Reinforced Polymers (CFRP) retrofitting was developed. The model analyzed the structure’s existing condition, inadequate elements were identified, and segments that required strengthening were determined. Retrofitting and external reinforcing techniques were applied, and their effectiveness evaluated. Elements identified as insufficient were subjected to a strengthening iteration process to ensure that all qualifications were fulfilled. It was proven that the numerical simulation was accurate, cost-effective and time-saving in evaluating deficient structures and the effectiveness of their strengthening methods. The numerical model and analysis in conjunction with the technology of jacketing and CFRP retrofitting provide a fast and straightforward solution for older structures in ameliorating their resilience and overall performance

Experimental Investigation on the Failure Behavior of Carbon Fiber Reinforced Polymer (CFRP) Strengthened Reinforced Concrete T-beams Junaedi Utomo; Muhammad Nur Khusyeni; Windu Partono; Ay Lie Han; Buntara S. Gan
Civil Engineering Dimension Vol. 23 No. 2 (2021): SEPTEMBER 2021
Publisher : Institute of Research and Community Outreach - Petra Christian University

Carbon Fiber Reinforced Polymers (CFRP) are widely used as external concrete reinforcement. The behavior of T-beams strengthened in shear and flexure using CFRP sheets and plates was studied to analyze the load carrying capacity and failure mode as compared to conventional concrete members. The bonding response of the plate-to-concrete was investigated by comparing a specimen with a plate anchored at the far ends, one without anchoring. The sheets were in situ wet lay-up, the plate was pre-impregnated and pultruded during manufacturing. The test result suggested that this integrated strengthening method notably improved the load-carrying capacity, it was also demonstrated that anchoring had a positive but insignificant effect on the moment capacity and deformation. The influence of anchoring was noteworthy from the point of view that it shifted the failure mode from debonding to CFRP plate rupture. The most important factors influencing the behavior of CFRP strengthened beams are outlined.

Co-Authors Ali Awaludin Andreas Triwiyono Arnie Widyaningrum Asshidiqie, Muhammad Rony Banu Ardi Hidayat Banu Ardi Hidayat Budipriyanto, Agung Buntara S. Gan Buntara Sthenly Gan Eva Wahyu Indriyati Ferianto Raharjo Harijanto Setiawan Hsuan Teh Hu Hsuan-Teh Hu Hsuan-Teh Hu Hsuan-Teh Hu I Gusti Lanang Bagus Eratodi Ilham Nurhuda Junaedi Utomo Junaedi Utomo Junaedi Utomo Lena Tri Lestari Moga Narayudha Muhammad Nur Khusyeni Nanang Gunawan Nauval Rabbani Nuroji Nuroji Parang Sabdono Prisca Evelyn Yulianita Rizqi, Safira Yulia Rudi Yuniarto Adi Sholihin As’ad Sie Alexander Patrick Subagyo Sri Tudjono Subagyo, Sie Alexander Patrick Sukamta Sukamta Supriyadi Supriyadi Vanessa Nurmalita Windu Partono Yanuar Haryanto

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