Shake table test of a full-scale four-story reinforced concrete structure and numerical representation of overall response with modified IMK model
Shake table test of a full-scale four-story reinforced concrete structure and numerical representation of overall response with modified IMK model
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DOI：
10.1007/s10518-017-0261-0
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发表时间：
2018-05
影响因子：
4.6
通讯作者：
C. Yenidogan;Ryosuke Yokoyama;T. Nagae;Ken Tahara;Y. Tosauchi;K. Kajiwara;W. Ghannoum
中科院分区：
文献类型：
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作者：
C. Yenidogan;Ryosuke Yokoyama;T. Nagae;Ken Tahara;Y. Tosauchi;K. Kajiwara;W. Ghannoum
本文主要通过利用日本基准结构的试验数据来验证我们现有的基于规范的知识的有效性。本文回顾了2010 E-Defense测试计划中的一座四层全尺寸钢筋混凝土建筑，以评估当前实践状态对钢筋混凝土结构实际地震响应的预测能力，方法是利用试验期间应用的宝贵数据和高质量测量技术。结构元素的细节符合日本的抗震设计规范，而对结构的最终设计进行了微小的修改，使其更接近选择性地众所周知的美国设计实践。为使1995年兵库县南部地震达到接近倒塌极限状态，进行了一系列全尺寸振动台试验。从试验数据中得到了结构由于损伤累积而产生的整体动力响应特性，以跟踪结构在力-变形滞后过程中的强度和刚度退化。即使故事的漂移角度超过了规范规定的限制，超过了0.04的临界水平，结构仍然保持了动力稳定性和完整的形式。根据每次试验结束时的调查和测量，剪力墙和梁柱节点受到严重破坏，而梁和柱在整个试验过程中保持其结构完整性。利用试验数据对抗弯框架和剪力墙框架中的高级滞回模型的参数进行了校准，以建立能够反映在挤压作用下循环劣化的所有模式的分析模型，作为日本通常使用的武田模型的替代。为了将多自由度体系转化为等效的单自由度体系，采用了一种简单的方法，将全局响应特性应用到通用的滞回模型中。此外，还验证了用改进的滞回模型模拟钢筋混凝土结构体系地震反应的能力。试验结果和数值分析表明，有必要进一步改进MLIT和美国的设计规定，以减少结构构件的损伤，特别是剪力墙和梁柱节点的损伤，以实现可修复性目标。
This paper mainly addresses the validity and verification of our current code-based knowledge through the utilization of test data of benchmark structure in Japan. A full-scale, four-story reinforced concrete building within the 2010 E-Defense test program is revisited to assess the capability of the current state of practice for the prediction of the actual seismic response of reinforced concrete structures by taking advantage of invaluable data and high-quality measurement techniques applied during the tests. The detailing of the structural elements was in compliant with the Japanese seismic design code whereas minor modifications were applied to the final design of the structure to bring it closer to the selectively well-known US design practice. A series of full-scale shake table tests were performed by gradually increasing the two ground motions of the 1995 Hyogo-Ken Nanbu earthquake for reaching to the near collapse limit state. Global dynamic response characteristics of the structure due to damage accumulation were derived from the test data to trace the strength and stiffness deterioration in the force–deformation hysteresis. Even though the story drift angles were exceeded the critical 0.04 level beyond the limitations of code-provisions, the structure has preserved dynamic stability and its intact form. Based on the surveys and measurements performed at the end of each test, shear walls and beam–column joints were sustained the severe damage while the beams and columns were maintained their structural integrity during the entire test program. Parameters of advanced hysteretic models in the moment-resisting and shear wall frames were calibrated using test data for developing analytical models that can represent all modes of the cyclic deterioration under pinching action as an alternative to the customarily used Takeda model in Japan. For the transformation of MDOF system to equivalent SDOF system, a straightforward procedure is applied to adopt the global response characteristics to the versatile hysteretic model. Moreover, the capability of capturing the seismic response of RC system through advanced hysteretic models is justified. The test results and numerical analyses implied the necessity of further improvements on MLIT and US design provisions for the reduction of observed damages on structural elements particularly in shear walls and beam–column joints to achieve reparability goals.