Characterising dynamic performance of fibre reinforced polymer structures for resilience and sustainability

纤维增强聚合物（FRP）复合材料的结构应用是导致航空、化工、海洋石油和天然气、铁路和海洋部门技术创新的关键因素之一。在这些成功的推动下，FRP型材和系统越来越多地用于建筑行业，如桥梁和小型住宅建筑。FRP材料在结构工程中广泛应用的一个障碍是目前缺乏全面的设计规则和设计标准。虽然美国和欧盟的静力作用设计指南的编制处于先进阶段，但动力荷载设计还不发达，导致谨慎和保守的结构设计方案。如果要在土木工程中使用FRP构件/结构以实现充分的经济、建筑和工程优点，则需要提高对FRP结构的动态特性（固有频率、模态阻尼比、模态质量和相关振动模式的振型）及其在动态作用（例如行人激励、车辆荷载、风和列车抖振）下的性能的认识。该项目将通过开发针对动态行为的设计新程序和建议，为设计实践提供一个步骤变化。这将通过以下方式实现：1）在沃里克大学校园开发一个仪表化桥梁结构，该结构将在项目过程中及以后提供对静态和动态性能的独特见解; 2）提供关于十个全尺寸FRP结构的动态特性和在役振动响应的新实验数据;以及3）对数值建模和当前振动适用性设计方法的关键评估。所收集的数据将以系统的形式提供，并通过一个开放的在线数据库提供给学术界和工业界受益者以及支持编制机构、国家和国际共识设计指南的机构，以便迅速和方便地传播。该项目的成果将为轻质FRP结构的可靠设计提供关键的缺失信息，并为这种结构材料成为未来大型桥梁和其他动态加载结构的“首选材料”铺平道路。这一中长期影响与英国拥有可持续和弹性建筑环境的国家计划相一致。

Structural application of fibre-reinforced polymer (FRP) composite materials is one of the key factors leading to technological innovations in aviation, chemical, offshore oil and gas, rail and marine sectors. Motivated by such successes, FRP shapes and systems are increasingly used in the construction sector, such as for bridges and small residential buildings. An obstacle to a wider use of FRP materials in structural engineering is the current lack of comprehensive design rules and design standards.While the preparation of design guidance for static actions is at an advanced stage in the USA and EU, the design against dynamic loading is underdeveloped, resulting in cautious and conservative structural design solutions. Knowledge on the dynamic properties (natural frequencies, modal damping ratios, modal masses and mode shapes of relevant vibration modes) of FRP structures and their performance under dynamic actions (such as pedestrian excitation, vehicle loading, wind and train buffeting) needs to be advanced if to achieve the full economic, architectural and engineering merits in having FRP components/structures in civil engineering works. This project will provide a step change to design practice by developing new procedures and recommendations for design against dynamic actions. This will be achieved by: 1) Developing an instrumented bridge structure at the University of Warwick campus that will provide unique insight into both static and dynamic performance over the course of the project, and beyond; 2) Providing novel experimental data on dynamic properties and in-service vibration response of ten full-scale FRP structures; and 3) Critical evaluation of the numerical modelling and current vibration serviceability design approaches. The data collected will be delivered in a systematic form and made available, via an open-access on-line database for rapid and easy dissemination, to academic and industrial beneficiaries, as well as to agencies supporting the preparation of institutional, national and international consensus design guidance. Outcomes from this project will provide the crucial missing information required for the reliable design of light-weight FRP structures, and pave the way towards this structural material becoming a 'material of choice' for future large-scale bridges and other dynamically loaded structures. This medium to longer-term impact is aligned with national plans for the UK having a sustainable and resilient built environment.