EAPSI: Implementation of High-Strength Materials in Structural Engineering Applications

最近的进步使高强度材料（HSM）能够用于结构中。 HSM提供了等效柱/梁强度的选择，同时减少了构件的尺寸。 钢筋混凝土结构广泛应用于世界各地的许多住宅建筑和桥梁中，由于高层建筑的上部荷载较大，因此高层建筑的基础需要高强混凝土（HSC）。 与高速切削相关的一个挑战是脆性破坏模式导致抗震性能差。虽然对高速钢结构的研究比较多，但对其抗震性能的研究却很少。在台湾进行这个项目提供了一个使用位于台北的独特的国家地震工程研究中心（NCREE）实验室的机会。在Shyh-Jiann Hwang博士的监督下，将在大型实验室中使用HSM进行建筑结构柱的全尺寸实验测试。这项研究将有助于确定使用普通强度混凝土的标准做法是否会成功过渡到高强度混凝土。 在完成全尺寸实验测试后，将结果与使用正常强度材料的类似测试进行比较，以了解不同加载模式下高速成型柱力学的差异。将通过分析模型进行参数研究，以进一步了解和理解。在对实验结果和数值结果进行处理后，这些结果将用于确定柱设计细节的改进。可能的改进可能包括改变加固细节，以改变限制。一旦确定了必要的改进，将生成最终的一组HSM列详细信息，并可用于确定HSM的详细设计代码。这个NSF EAPSI奖是与台湾国家科学理事会合作资助的。

Recents advancements now enable high-strength materials (HSM) to be used in structures. HSMs provide the option for equivalent column/beam strength while reducing the dimensions of the member. Reinforced concrete structures are widely used in many residential buildings and bridges throughout the world with the need for high-strength concrete (HSC) towards the base of high-rise buildings due to the large load from upper levels. A challenge associated with HSM is the brittle failure mode resulting in poor seismic performance. Although research on HSM is prevalent, there has been limited research on its seismic performance. Conducting this project in Taiwan provides the opportunity to use of the unique National Center for Research on Earthquake Engineering (NCREE) Laboratory in Taipei. Full-scale experimental tests of columns for building structures using HSM will be performed in the large lab under the supervision of Dr. Shyh-Jiann Hwang. This research will help determine if standard practice using normal-strength concrete will transition to high-strength concrete successfully. Upon completion of the full-scale experimental tests, the results will be compared with similar tests using normal strength materials to understand the differences in mechanics of HSM columns under various loading patterns. A parametric study will be performed via analytical models to further knowledge and understanding. After results from experimental and numerical results are processed, these results will be used to determine refinements to the column design details. Possible refinements may include changes in reinforcement details for varying the confinement. Once the necessary refinements are determined, a final set of HSM column details will be generated and can be used to determine a detailed design code for HSM. This NSF EAPSI award is funded in collaboration with the National Science Council of Taiwan (Taiwan).