Development of Design Method and Dynamic Performance of Modern Timber Bridges used Glulam

在本研究的实施过程中澄清的事项如下：1.收集了全国47个行政区划的700座桥梁的现代木桥架设结果数据，并通过对结构、类型、木材种类等因素的因子分析，定量掌握了日本现代木桥的实际情况。通过对7座现代木质公路桥的实桥试验数据的收集，得到了该桥的动力响应、加速度、速度、振动位移。明确了现代木桥的车辆通行能力和基于行人振感的行车舒适度等实际情况。但是，由于没有对结构胶合板进行重复动载试验，因此无法从疲劳试验机的故障中定量评价胶合板的疲劳行为和强度。在国际上首次建立了现代木质桥梁的三维动力响应分析方法，即利用三维模型对现代木质桥梁进行整体性分析，得出了动力响应定量动态增量系数占空比动力响应系数的性能规律。从分析结果与试验结果的一致性检验了现代木桥的具体设计方法。在上述动力特性评价的基础上，提出了适合现代木桥和混凝土性能规范的部分性能设计方法，明确了其综合性能、均匀性能和动力性能。

The matters, which are clarified in the performance of this study, are as follows.1. It was possible that it collected the data of 700 bridges from national 47 administrative divisions on the erection results of modern timber bridges, and that from the factorial analysis of structure, types, timber species, etc., it quantitatively grasps actual condition of modern timber bridges of in Japan.2. By the collection of actual bridge test data for the 7 bridges of the modern timber roadway bridge, dynamic behavior response acceleration velocity vibration displacement. In addition, vehicle moving ability of modern timber bridges and actual condition such as serviceability based on vibration sense of pedestrian were clarified.3. Though or, dynamical influence and fatigue strength of glulam would clarify it by not having experiment on the structural glulam by repetition dynamic load with the joint vehicle travel, the quantitative evaluation of fatigue behavior and strength of glulam could not be carried out from the trouble of fatigue testing machine.4. The three-dimensional dynamic response analysis method which is the completeness of modern timber bridges by the running vehicle with the three dimensional model is formulated for the first time in the world, and it was found out that dynamic response quantitative dynamic increment factor duty cycle dynamic response coefficient performance regulation. The concrete design method of modern timber bridges was examined from the consistency of this analytical result and experimental result.5. Based on the characteristic evaluation of above dynamic behavior, it was possible to develop the part of performance design method suitable for modern timber bridges and concrete performance regulation, while the synthetic, uniform and dynamic performance is clarified.