構造物の主な劣化現象は疲労と腐食である。現在、鋼構造物、特に鋼橋梁においてこれらの劣化現象が顕在化しており社会的な問題となっており、これらの現象およびそれに対する対策を理解し、実践していく能力を有することは、これからの建設系技術者にとって重要なことと考えられるが、現状、鋼構造物の耐久性設計に関わる講義が現在ないことが申請理由である。本講義では鋼構造物の耐久性設計について、特に鋼橋梁などの道路鋼構造物や水門・海洋構造物などを例に挙げ、これらの構造物の劣化の現状と、それらの劣化現象に対する耐久設計手法、劣化の検知や補修・補強法といった維持管理手法などを、最新の技術情報を併せて講義を行う。授業は講義形式で行う。但し、講義開始数回は、講義を理解するための基礎的な情報として、鋼材の種類と性質・溶接等の接合法、破壊力学などの基礎的な情報を講義することから開始する。
The main deterioration mechanism of structures are fatigue and corrosion. At present, these deteriorations have become apparent in steel structures, especially steel bridges, and have become a social problem. It will be necessary for construction engineer to have the ability to understand these deterioration and implement countermeasures against them.
This lecture introduce the durability design of steel structures, in particular, such as steel bridges, water gates, marine structures, etc. are taken as examples. The class also introduce the current state of deterioration of these structures and the durability design against those deterioration mechanism. Lectures will be given on maintenance methods such as deterioration detection and repair / reinforcement methods, along with the latest technical information. However, the first few lectures will start with lectures on basic information such as the types and properties of steel materials, joining methods such as welding, and fracture mechanics as basic information for understanding the durability design.
The main deterioration mechanism of structures are fatigue and corrosion. At present, these deteriorations have become apparent in steel structures, especially steel bridges, and have become a social problem. It will be necessary for construction engineer to have the ability to understand these deterioration and implement countermeasures against them.
This lecture introduce the durability design of steel structures, in particular, such as steel bridges, water gates, marine structures, etc. are taken as examples. The class also introduce the current state of deterioration of these structures and the durability design against those deterioration mechanism. Lectures will be given on maintenance methods such as deterioration detection and repair / reinforcement methods, along with the latest technical information. However, the first few lectures will start with lectures on basic information such as the types and properties of steel materials, joining methods such as welding, and fracture mechanics as basic information for understanding the durability design.
鋼構造物の劣化メカニズムに対する耐久設計法および補修補強対策を理解することを目的とする。そのため、鋼材料・鋼の接合方法・鋼構造物の構造などの基礎知識を学んだ後に、診断方法・補強方法などの知識を得ることを目的とする
The purpose is to understand the durability design method and repair reinforcement methods for the deterioration of steel structures. The class gives knowledge of diagnostic methods, reinforcement methods, etc. after giving basic knowledge such as steel materials, steel joining methods, steel structure structures, etc.
The purpose is to understand the durability design method and repair reinforcement methods for the deterioration of steel structures. The class gives knowledge of diagnostic methods, reinforcement methods, etc. after giving basic knowledge such as steel materials, steel joining methods, steel structure structures, etc.
- 鋼構造物の劣化メカニズムを理解できる
Understand the deterioration mechanism of steel structures - 鋼構造物の耐久性設計について理解できる
Understand the durability design for steel structures - 実構造物に生じる劣化現象原因の解明手法および補修補強設計について理解できる
Understand the the methods to analyze the deterioration mechanism of existing steel structures and repair methods
| Class schedule | HW assignments (Including preparation and review of the class.) | Amount of Time Required | |
|---|---|---|---|
| 1． | 鋼構造物の劣化の現状 Deterioration of actual steel structures |
学部時に学習した鋼構造について復習しておくこと Review the steel structures learned in undergraduate school |
120minutes |
| 2． | 鋼材の種類と機械的性質 Steel grade Steelmaking method Influence of chemical compositions Mechanical properties of steel materials |
鋼の機械的性質と化学組成の関係について復習しておくこと Review the influence of chemical compositions on mechanical properties of steel materials |
190minutes |
| 3． | 鋼材の接合1 Joints of steel members (bolt connections) type of bolt connection design of friction type bolt connections |
ボルト接合について予習・復習しておくこと Review the bolt connection using distributed PPT before and after class |
190minutes |
| 4． | 鋼材の接合2 Joints of steel members (weld connections) type of weld welding residual stress and deformation weld defects and non-destructive testing |
溶接接合について予習・復習しておくこと Review the weld connection using distributed PPT before and after class |
190minutes |
| 5． | 疲労現象の概説 Introduction of fatigue |
疲労現象について復習しておくこと Review the fatigue of steel structures learned in undergraduate school |
190minutes |
| 6． | 鋼構造物における疲労発生メカニズムの概説――ケーススタディー Introduction of some fatigue cases in actual steel structures, including mechanism of fatigue damages methods to analyze the mechanism of fatigue damages repair method |
ケーススタディに出てきた疲労発生メカニズムを復習しておくこと | 160minutes |
| 7． | 疲労設計(道路橋） Fatigue design for highway bridges |
疲労設計について復習しておくこと Review the fatigue design using the distributed PPT after class |
190minutes |
| 8． | 疲労現象の検知 Inspection works to detect fatigue cracking |
種々の非破壊検査法について復習しておくこと Review under understand inspection method and actual inspection works for fatigue damages after class |
240minutes |
| 9． | 疲労現象の診断 Evaluation of fatigue damages (accumulated fatigue damage and remaining fatigue life) |
累積損傷度、余寿命評価などについて復習しておくこと Review the evaluation method of accumulated fatigue damage and remaining fatigue life |
240minutes |
| 10． | 疲労現象の補修・補強 Repair and retrofit works for fatigue damaged members (class includes introduction of actual repair works in bridge structures) |
疲労損傷の補修・補強法を復習しておくこと Review the repair and retrofitting method, including it's design method using the distributed PPT after class |
240minutes |
| 11． | 腐食現象の概説 Introduction of corrosion damages |
腐食メカニズムについて理解すること Review and understand the corrosion mechanism |
190minutes |
| 12． | 鋼構造物における腐食発生メカニズム――ケーススタディー Introduction of some corrosion cases in actual steel structures, including mechanism of corrosion damages methods to analyze the mechanism of corrosion damages repair method |
鋼構造物の腐食の特徴について理解すること Review and understand the corrosion damages in steel structures using distributed PPT |
190minutes |
| 13． | 腐食現象に対する診断・補修・補強 Repair and retrofit works for corrosion damaged members (class includes introduction of actual repair works in bridge structures) |
腐食現象の診断・補修・補強方法について理解すること Review the repair and retrofitting method, including it's design method using the distributed PPT after class |
190minutes |
| 14． | 試験及びその解説 Examination and comments |
授業全体を復習しておくこと Review the whole classes and prepare for the exam |
240minutes |
| Total. | - | - | 2760minutes |
| 課題１ | 課題2 | 期末試験 | Total. | |
|---|---|---|---|---|
| 1. | 10% | 20% | 30% | |
| 2. | 10% | 20% | 30% | |
| 3. | 5% | 5% | 30% | 40% |
| Total. | 15% | 15% | 70% | - |
課題30点と期末試験70点で評価する（６０点以上を合格とする）
Evaluate with 30 points for assignments and 70 points for final exams (60 points or more are passed)
Evaluate with 30 points for assignments and 70 points for final exams (60 points or more are passed)
| Work experience | Work experience and relevance to the course content if applicable |
|---|---|
| N/A | N/A |
- 9.INDUSTRY, INNOVATION AND INFRASTRUCTURE
- 11.SUSTAINABLE CITIES AND COMMUNITIES
Last modified : Fri Mar 18 23:16:30 JST 2022