Probabilistic Assessment of Buildings Subjected to Multi-Level Earthquake Loading Based on the PBSD Concept

Abstract

An alternative probabilistic assessment of buildings excited by multi-level seismic loading is presented in this paper. This evaluation is developed for both steel and reinforced concrete buildings using the Performance-Based Seismic Design (PBSD) concept. The methodology implements Probability Density Functions (PDFs) of inter-story drifts to extract structural risk in terms of the reliability index. Ten buildings of steel and reinforced concrete, respectively, are designed considering different locations in Mexico. Then, each structure is excited by ground motions representing different earthquake intensity levels for three performance levels: immediate occupancy, life safety, and collapse prevention. The deterministic seismic response of buildings is extracted using the finite element software OpenSees. Based on the results, it can be stated that the probabilistic assessment technique represents an efficient approach for extracting the seismic risk of structures using PDFs of inter-story drifts. Lastly, it is demonstrated that the evaluation of buildings following PBSD is a step in the right direction, moving from traditional deterministic design concepts to probabilistic philosophies.

Design and Hysteretic Performance Analysis of a Novel Multi-Layer Self-Centering Damper with Shape Memory Alloy

“…In accordance with the direction and magnitude of the horizontal displacement which occurs between the intermediate plate and the circular large slider, the stress-strain paths of the SMA wires under different SMA strain patterns can be further categorized into four tenses. Taking the right-side SMA wire in Figure 4 as an example: tense 1 ⃝ involves stretching from the pre-tension strain point to the furthest point, tense 2 ⃝ involves returning from the furthest point to the original position, tense 3 ⃝ involves unloading from the pretension strain point to the furthest point, tense 4 ⃝ involves returning from the furthest point to the pre-tension strain point, tense 5 ⃝ represents the tense 1 ⃝ of the second cycle, (6) tense 6 represents the tense 2 ⃝ of the second cycle, tense 7 ⃝ represents the tense 3 ⃝ of the second cycle, and so forth. The real-time strain of the SMA wires can be determined by the horizontal displacement ∆ which occurs between the intermediate plate and the circular large slider, and then the corresponding real-time stress can be obtained in conjunction with the specific stress-strain paths of the SMA wires.…”

“…In the field of civil and architectural engineering, structures are inevitably subjected to various types of vibrational loads, such as wind loads, seismic loads, and explosive impact loads. Traditional seismic-resistant structures typically rely on the plastic deformation of structural elements to dissipate energy in order to meet deformation and vibration energy dissipation requirements [1,2]. For structures with specific usage requirements, such as nuclear power plant containment structures and liquid storage tanks, excessive structural damage or excessive structural vibration response is unacceptable.…”

Structural reliability of steel buildings with X‐bracing systems considering the performance‐based seismic design philosophy

“…Thus, every one of the selected ground motions must match the spectral acceleration of the target response spectrum at the first mode of vibration of the structure, and the shape of the response spectrum of the selected ground motions must be closer to the target one. [1]…”

“…Earthquakes are catastrophic natural phenomena that have caused important human and economic losses around the world [1].…”

“…Earthquakes are catastrophic natural phenomena that have caused important human and economic losses around the world [1]. Considering this, it has been documented a great number of damages to the infrastructure of several countries.…”