IIT-H to host CARRS 2020

Indian Institute of Technology-Hyderabad (IIT-H) will host an International Conference on Assessment, Rehabilitation and Retrofitting of Structures (CARRS) 2020 from December 14 to 16, 202

IIT Hyderabad to host conference on retrofitting of structures

Indian Institute of Technology-Hyderabad (IIT-H) will host an International Conference on Assessment, Rehabilitation and Retrofitting of Structures (CARRS) 2020 from December 14 to 16, 202

Nonlinear Finite-Element Analysis of RC Bridge Columns under Torsion with and without Axial Compression

Finite-element (FE) modeling of RC structures under combined loading has received considerable attention in recent years. However, the combination of torsion and axial compression has been rarely studied in spite of its frequent occurrence in bridge columns under earthquake loading. This paper aims at creating a nonlinear FE model to predict the behavior of RC bridge columns under combined torsion and axial compression. A number of circular and square columns were analyzed. The developed FE model was calibrated on local and global behavior through comparison with test data. The overall torque-twist behavior of the members was captured well by the developed FE models. The predicted values of strain in the longitudinal and transverse reinforcement matched closely with the experimental results. An increase in transverse steel ratio was found to increase the torsional capacity and limit the damage of columns under torsion. It was further observed that at a low level of axial compression, the torsional capacity of columns is enhanced. In addition, the FE analysis showed a good agreement on the identification of the damage mechanism and the progression of failure. The shape of the cross section is found to play a major role in the distribution of torsional damage in the columns. Square columns exhibited a more localized damage due to presence of warping, whereas circular columns exhibited damage distributed along their length. (C) 2015 American Society of Civil Engineers

A Study on Residual Compression Behavior of Structural Fiber Reinforced Concrete Exposed to Moderate Temperature Using Digital Image Correlation

Fire ranks high among the potential risks faced by most buildings and structures. A full understanding of temperature effects on fiber reinforced concrete is still lacking. This investigation focuses on the study of the residual compressive strength, stress strain behavior and surface cracking of structural polypropylene fiber-reinforced concrete subjected to temperatures up to 300 A degrees C. A total of 48 cubes was cast with different fiber dosages and tested under compression after exposing to different temperatures. Concrete cubes with varying macro (structural) fiber dosages were exposed to different temperatures and tested to observe the stress-strain behavior. Digital image correlation, an advanced non-contacting method was used for measuring the strain. Trends in the relative residual strengths with respect to different fiber dosages indicate an improvement up to 15 % in the ultimate compressive strengths at all exposure temperatures. The stress-strain curves show an improvement in post peak behavior with increasing fiber dosage at all exposure temperatures considered in this study

Penggunaan Metode Kerja Kelompok dalam Pembelajaran IPS untuk Meningkatkan Hasil Belajar Siswa Kelas II

Tujuan penelitian ini adalah untuk meningkatkan hasil belajar siswa pada pembelajaran IPS di kelas II SD Negeri 3 Sungai Kunyit dengan menggunakan metode kerja kelompo. mendeskripsikan peningkatan hasil belajar siswa menggunakan metode kerja kelompok. Memberikan informasi yang akurat mengenai peningkatan hasil belajar siswa dengan menggunakan metode kerja kelompok pada pembelajaran IPS di kelas II SD Negeri 3 Sungai Kunyit.Penelitian ini adalah penelitian tindakan kelas yang terdiri dari dua siklus, dengan tahapan masing-masing siklus yaitu perencanaan, pelaksanaan, observasi dan refleksi.Penelitian ini dilaksanakan di SD Negeri 3 Sungai Kunyit.Subjek penelitian adalah siswa kelas II yang berjumlah 28 orang siswa.Data yang diperoleh dari hasil nilai belajar siswa.Perencanaan pembelajaran IPS di kelas II SD Negeri 3 Sungai Kunyit telah dilaksanakan dengan kategori baik. Hal ini dilihat pada lembar IPKG I siklus I dengan rata-rata 2,89 dan IPKG siklus II 3,31. Peningkatan IPKG siklus I dan IPKG siklus II adalah sebesar 0,42 Kata Kunci: metode kerja kelompok dan hasil belajar Abstrac: the purpose of this research is to improve the learning outcomes of students in learning in class II IPS SD Negeri 3 Streams of Saffron by using methods of work kelompo. describe the improvements in students \u27 learning results using the methods of work of the group. Provide accurate information regarding the improvement of student learning outcomes by using the methods of group work on IPS in learning elementary grade II Country 3 Rivers turmeric. The research is the research action class that consists of two cycles, with each cycle of the phases of planning, implementation, observation and reflection. This research is carried out in SD Negeri 3 Streams of Saffron. The subject of research is the grade II which amounted to 28 students. Data obtained from the results of students \u27 learning value. Planning learning IPS in class II SD Negeri 3 River Turmeric have been implemented with categories either. It is seen on the sheets cycle I I with IPKG average 2,89 and IPKG cycle II 3.31. An Increase InIPKG cycle I and cycle II is IPKG amounted to 0.4

Flood Zone Mapping – A Study on Cooum River

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Effect of Urbanization on Flooding: Adyar River a Case Study

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Experimental and numerical studies on flexural behaviour of lightweight and sustainable precast fibre reinforced hollow core slabs

This study reports experimental and numerical studies on the flexural behaviour of sustainable fibre reinforced lightweight hollow core slabs (FR-LWHCS). An innovative and sustainable LWHCS is proposed for structural applications using a lightweight concrete mix of 1800 kg/m3 density, previously developed by authors. Full-scale precast LWHCS specimens are cast and tested under flexure using a four-point loading configuration. A high shear span to depth (a/d) ratio of 10 is chosen to have flexure dominant behavior. FR-LWHCS is made using sintered fly ash aggregate (SFA) as coarse aggregate and monofilament macro synthetic fibres of different volumetric fibre dosages (0.4 % and 0.6 %). A small dosage of micro synthetic fibres of 0.02 % by volume is also added to arrest shrinkage cracks. Two control slabs, one constructed with lightweight concrete and the other with conventional normal density concrete, are tested. The digital image correlation (DIC) technique is used to track the cracks and failure modes. A 3D finite element analysis is performed to supplement the test results. Test results show that FR-LWHCS satisfies all the structural requirements, leading to economy and sustainability. FR-LWHCS with 0.6 % fibre dosage performed better than hollow core slabs made of normal density concrete. Though the addition of fibres did not considerably increase peak load, a minimum dosage of fibre addition is warranted in LWHCS to improve the serviceability performance. Fibre addition significantly improved the strain energy absorption