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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Pseudo-dynamic and quasi-static testing of hinged truss with all-steel buckling-restrained braces at base
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Pseudo-dynamic and quasi-static testing of hinged truss with all-steel buckling-restrained braces at base

机译：基地全钢屈曲抑制牙套铰接桁架的伪动态和准静态测试

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摘要

Hinged truss with buckling-restrained braces at base (HTBB) is composed of a rocking steel braced frame system and two replaceable all-steel buckling-restrained braces (BRBs) installed symmetrically on both sides at the bottom of the rocking steel braced frame. BRBs are used as hysteretic energy-dissipating devices and damage is concentrated in BRBs. The rocking steel braced frame remains in an elastic state to control the deformation mode of the structure. Pseudodynamic testing and quasi-static testing were conducted on a 1/3-scale HTBB test specimen to investigate its seismic performance. The test program also includes the retrofitting process and replacement process. Pseudodynamic testing revealed that the HTBB effectively controlled the deformation pattern. The quasi-static cyclic testing demonstrated that the system behaved in a ductile and stable manner with no strength degradation, even up to 2.5% roof drift. The damage was concentrated in the BRBs, and no damage to the hinged truss was observed throughout the testing. The failure was governed by the fracture of the BRBs. The effectiveness of the displacement-controlled retrofitting solutions was verified and the function of the test specimen can be restored by replacing the damaged BRBs, which indicated that HTBB belongs to a resilient structural system. Finally, a finite-element model was developed to simulate the seismic response of the test specimen. Comparisons showed good agreement between the numerical results and the pseudodynamic test results.
机译：铰接桁架在底座（HTBB）上有屈曲束缚的牙套由摇摆支撑框架系统和两个可更换的全钢屈曲束缚的括号（BRBS）组成，在摇摆钢板底部的两侧对称地安装。 BRBS用作滞后能量耗散装置，损坏集中在BRB中。摇摆钢支撑框架保持弹性状态以控制结构的变形模式。在1/3尺寸的HTBB试样上进行了假影动力学测试和准静态测试，以研究其地震性能。测试程序还包括改装过程和更换过程。假影动力学测试显示，HTBB有效地控制了变形图案。准静态循环测试表明，该系统以延展岩和稳定的方式表现，没有强度降解，甚至高达2.5％的屋顶漂移。损伤浓缩在BRB中，在整个测试中没有对铰接桁架造成损害。失败是由BRB的骨折管辖。验证了位移控制改造溶液的有效性，并且可以通过更换损坏的BRB来恢复测试样品的功能，这表明HTBB属于弹性结构系统。最后，开发了有限元模型来模拟试样的地震反应。比较在数值结果和假实际测试结果之间表现出良好的一致性。

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