A new extension for the applied-element method structural analysis is introduced. In this method, structure modeled as an assembly of elements made by dividing virtually. This paper first introduces element formulation method. Next, effects size and arrangement are discussed, finally, accuracy proposed in a nonlinear material case verified studying behavior RC structures under cyclic loading. For caused elements, it shown that accurate results stresses strains can be obtained if small used....

著者らは, 構造物の大変形問題や完全に崩壊に至るまでの挙動を, 高い精度でしかも適正な計算時間で解析することを目的に, 新しい構造解析手法 (応用要素法) の開発を進めている. 提案モデルでは, 解析対象媒質や構造物は仮想的に分割された小要素の集合体として考え, 各要素の辺同士は法線方向と接線方向にそれぞれ分布型のばねで結合されている. 本研究では, モデル構築の第一歩として行った線形材料の微小変形領域を対象とした基本理論の構築と定式化について紹介し, さらに提案モデルを用いた解析結果と理論解を比較することでその高い精度を確認した.

In this article, an algorithm for detecting subsurface voids under the road from ground penetrating radar images is proposed. A multichannel system mounted on vehicle enables dense and highspeed monitoring. The novelty of a unique ElectroMagnetic simulation method state-of-the-art deep learning technique to consider three-dimensional (3-D) reflection patterns voids. To train models, 3-D were reproduced by 2-D finite difference time domain drastically reduce calculation cost. Hyperboloid...

A rapid mapping of landslides following a disaster is important for coordinating emergency response and limiting rescue delays. synthetic aperture radar (SAR) can provide solution even in harsh weather at night, due to its independence light, quick response, no contact broad coverage. This study aimed conduct comprehensive exploration on the intensity coherence information three Advanced Land Observing Satellite-2 (ALOS-2) SAR images, massive landslide pixel level, order reference future...

Reinforced concrete (RC) frames are an integral part of modern construction as they resist both gravity and lateral loads in beams columns. However, the methodologies RC vulnerable to non-engineering defects, particularly developing countries. The most common defect occurs due improper lap splice, which can compromise structural integrity. This research demonstrates easy, low-cost, verifiable experimental technique incorporating micro-concrete evaluate seismic performance a completely...

Abstract Unreinforced masonry (URM) buildings are prone to significant damage when subjected ground motion. Some strengthening methods have been proposed increase the seismic capacity. However, widespread adoption of these faces various challenges, including economic constraints experienced by common people in developing countries, complexity implementation, efficiency, and safety each technique. This paper introduces a new retrofitting method fiber-reinforced paint using fiberglass as...

Abstract The use of low-compressive-strength concrete hollow blocks (CHB) as construction material in developing countries presents significant challenges to earthquake resilience. Weak CHBs are inherently vulnerable earthquakes, not just at the structural level (in-plane, out-of-plane wall collapses, and roof failures), but also individual masonry unit level. This vulnerability increases risk failures during posing a threat safety building occupants. study investigates effectiveness...

Abstract Shaking table tests were conducted to investigate the response of rectangular wooden blocks and block assemblies various sizes slenderness harmonic earthquake base excitation. The shaking followed by an analytical a numerical study single assemblies. was aimed at establishing criteria for initiation rocking overturning in motion consisted solving numerically differential equations rigid on foundation. study, course which both examined, implemented means Distinct Element Method...

本論文では, 著者らが開発を進めている新しい構造解析手法 (応用要素法) を構造物の動的大変形解析に応用するための理論とそれを用いた解析結果を紹介している. 提案手法を用いると, 弾性挙動からクラックの発生・進展と言った非線形挙動, さらに破壊が進んで要素や要素の集合体が周囲の要素から完全に離れて独立に運動するまでの動的大変形挙動の解析が可能である. 理論解との比較からは, 簡便なモデルも用いているにもかかわらず提案手法の解析精度が非常に高いことが確認された. 更に提案手法は, 事前に破壊の位置や破壊モードを仮定する必要がない点でも優れている.

A new method for analyzing the fracture of concrete structures is proposed in which considered a granular assembly. Because complex, extremely heterogeneous material, it difficult to analyze it's failure properties by Finite Element Method (FEM) homogeneous, continuous medium. We have developed Modified Distinct (MDEM) that can be applied problems structures. In MDEM respective major constituents concrete, gravel and mortar, are represented as circular particle elements nonlinear springs,...

This paper introduces a technically feasible and economically affordable retrofitting option for seismically vulnerable masonry structures in developing countries using polypropylene bands (PP-bands). The results of the basic material tests shake table on building models show that PP-band technique can enhance safety both existing new buildings, even during severe ground motions, instance an earthquake with Japan Meteorological Agency (JMA) seismic intensity 7. Therefore, proposed method is...

In the current research work, an attempt is made to increase seismic capacity of unreinforced masonry (URM) structures by proposing a new composite material which can improve shear strength and deformation URM wall systems. Fiber Reinforced Polymer (FRP) having high tensile stiffness significantly in-plane out-of-plane walls, but, inherently, FRP strengthened systems exhibit brittle failure under extreme loading. Polypropylene (PP-band) low cost with sufficient ductility capacity. Keeping in...

After the 2011 Great East Japan Earthquake, Japanese government identified lack of proficiency in language as one characteristic foreigners that should be considered disaster prevention planning. This article seeks to understand how a local affects information gathering behavior by using results questionnaire survey conducted after Earthquake. Respondents were categorized based on their and English abilities. Their media mode, preferences, importance, information-gathering difficulties also...

本論文では, 著者らが開発を進めている新しい構造解析法 (応用要素法) を用いて, 鉄筋コンクリート (RC) を代表とする複合材料からなる構造物の非線形破壊挙動をシミュレーションする手法を提案するとともに, その解析結果を紹介する. 応用要素法開発の目的は, 構造物の大変形問題や完全に崩壊に至るまでの挙動解析を, 簡単なモデルで高精度に, しかもリーズナブルなCPUタイムで実施することにある. 本手法では, 破壊の発生位置や進展方向の仮定, 複雑な非線形材料モデルなどは必要としないが, RC構造を対象とした破壊解析結果と実験結果との比較からは, 本手法により, 荷重-変位曲線のみならず, クラックの発生から進展状況を含めた破壊挙動が高い精度で追跡できることが確認された.

The extended distinct‐element method (EDEM) is used to construct models of multi‐degrees‐of‐freedom systems for particles concrete frames and conduct a series numerical simulations in which the collapsed due seismic forces. When frame collapses, it reduced pile debris. If debris rejoined form frame, original shape restored; i.e., prior collapse considered be an assembled body EDEM analyzing discontinuous bodies, but here we report on analysis contain elements body. For convenience, assumed...

Abstract The impact of income disparity on vulnerability and information collection during the 2011 Thai Flood was examined through a survey investigation. Lower‐income respondents were found to have been more likely be inundated by flood than higher‐income because location their residences, lower‐income whose residences flooded also less evacuated. Television widely used, regardless level, but tended utilise lower‐technology modes, such as radios loudspeakers, in contrast Internet‐based...

The current study is devised to evaluate the seismic performance of fiber-reinforced polymer (FRP) retrofitted buildings with openings at different FRP reinforcement levels. Required objectives are achieved by performing five shake table tests on 1/4-scale models single-story boxlike masonry buildings. Out building models, one was an unreinforced (URM) model whereas other four were quantities and layouts reinforcement. reduced decreasing strip widths spacing applying strips either inside or...

In this research, a new system is developed to aid the existing emergency response practices after massive earthquake, hereafter called Earthquake Emergency Micro Response System (EEMRS). This can observe post-earthquake situations by integrating smart watch data using exposed population with Geographic Information (GIS). A potential tool dissipate information of location and health condition victim. methodology identify trapped victims critical rescue area dissipated watches elements. The...