地震工程与工程振动最新文献_第10页

EARTHQUAKE-INDUCED STRUCTURAL POUNDING BETWEEN TWO INELASTIC SDOF STRUCTURAL SYSTEMS 两个非弹性单自由度结构体系之间的地震诱发结构冲击

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8622.19433

Pedro L. P. Folhento, R. Barros, M. Braz-César

引用次数: 1

OUT-OF-PLANE RESPONSE OF T-SHAPED MASONRY WALLS STRENGTHENED WITH CFRP INJECTED ANCHORS: MODELLING AND DESIGN PROVISIONS CFRP注入锚杆加固t形砌体墙的面外响应:建模与设计规定

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8524.19477

A. Maione, C. Casapulla, F. Ceroni, M. Di Ludovico, A. Prota

引用次数: 0

ENRICHED BEAM FINITE ELEMENT MODELS WITH TORSION AND SHEAR WARPING FOR DYNAMIC ANALYSIS OF FRAME STRUCTURES 用于框架结构动力分析的带扭转和剪切翘曲的充实梁有限元模型

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8621.19293

D. Addessi, P. Re, C. Gatta

{"title":"ENRICHED BEAM FINITE ELEMENT MODELS WITH TORSION AND SHEAR WARPING FOR DYNAMIC ANALYSIS OF FRAME STRUCTURES","authors":"D. Addessi, P. Re, C. Gatta","doi":"10.7712/120121.8621.19293","DOIUrl":"https://doi.org/10.7712/120121.8621.19293","url":null,"abstract":". This work investigates the performance of the enhanced beam Finite Element (FE) formulations proposed in [20] for the dynamic response of frame structures subjected to shear and torsional actions. These formulations introduce enriched kinematic descriptions to describe the out-of-plane deformations of beam cross-sections, in addition to the standard in-plane rigid modes. First model is based on the Vlasov’s theory, enriched to include shear induced warping, and is developed according to a displacement-based approach. To this end, additional degrees of freedom (DOFs) are introduced at the two element end nodes and are used to inter-polate warping along the element axis, so that the inﬂuence of warping restraints at the element boundaries are properly accounted for. Second model is based on the Benscoter’s warping theory, also enriched to include shear warping, and is developed according to a mixed formulation free from shear-locking. Third model is the extension of second formulation and considers a general and accurate warping description. Indeed, a variable number of additional DOFs is introduced over the element cross-section and the warping displacement ﬁeld is interpolated at two levels, along the beam axis and over the cross-section plane. Numerical analyses are presented to assess the performances of the three models in describing the seismic response of frame structures, when shear/torsional actions dominate the structural behavior. Results are compared with the solutions obtained from standard beam and more involving shell and brick FE models.","PeriodicalId":66281,"journal":{"name":"地震工程与工程振动","volume":"898 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77479184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE USE OF INTELLIGENT FACADES FOR UPGRADING ENERGY AND SEISMIC DEMANDS OF EXISTING R/C STRUCTURE 使用智能立面来提高现有r / c结构的能源和抗震要求

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8679.19493

Lazaros Melidis, E. Kechagias, K. Katakalos, G. Manos

{"title":"THE USE OF INTELLIGENT FACADES FOR UPGRADING ENERGY AND SEISMIC DEMANDS OF EXISTING R/C STRUCTURE","authors":"Lazaros Melidis, E. Kechagias, K. Katakalos, G. Manos","doi":"10.7712/120121.8679.19493","DOIUrl":"https://doi.org/10.7712/120121.8679.19493","url":null,"abstract":"The installation of exterior facades made of metal elements in buildings is a dual function application: On one hand it alters the facade, through architectural modifications, and on the other it creates the conditions for the improvement of energy efficiency of the building, utilizing the gap that develops between old and new facade. In order to ensure that the suspension and anchoring system can safely receive both static and dynamic loads, which will strain the construction during its life cycle, it is necessary to carry out a set of controls that will ensure exactly this: the static and anti-seismic adequacy of the used suspension and anchoring system. For this reason, a building consisting of frames was chosen, on the perimeter of which masonry was placed and, then, the metal facades were hung on the masonry, through the use of appropriate joints. Through Dynamic Spectral Analysis and Time History Analysis, the adequacy or not of the suspension system was examined, but also the effects that the system had on the modal, strain and deformation sizes of the building. In the end, it was concluded that the attachment of elements to the facade of the building, although it is done for architectural or other purposes, brings about significant changes in its seismic response and, therefore, must be adequately studied.","PeriodicalId":66281,"journal":{"name":"地震工程与工程振动","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77003341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SEISMIC ACTION COMBINATION RULES FOR THE DESIGN OF AZIMUTH-INDEPENDENT STRUCTURES 方位无关结构设计的地震作用组合规则

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8854.18598

N. Karaferis, D. Vamvatsikos

{"title":"SEISMIC ACTION COMBINATION RULES FOR THE DESIGN OF AZIMUTH-INDEPENDENT STRUCTURES","authors":"N. Karaferis, D. Vamvatsikos","doi":"10.7712/120121.8854.18598","DOIUrl":"https://doi.org/10.7712/120121.8854.18598","url":null,"abstract":"The validity of the typical 100/30 combination rule for horizontal seismic action effects is investigated for the design of structures that are axially symmetric along the vertical direction. The 100/30 rule stipulates that one should combine 100% of the seismic action in one principal direction (as estimated by the design spectrum) with 30% of the action in the other principal direction, and vice-versa. Having been derived for azimuth-dependent structures, having e.g., a rectangular plan, it takes advantage of the fact that the two horizontal components of ground motion are only partially correlated, with peaks that in general do not happen simultaneously, to reduce the overall design loads. On the contrary, vertical liquid-storage tanks, silos and chimneys are examples of azimuth-independent structures, which by virtue of their symmetry will always experience the worst-possible incidence angle of a ground motion. To quantify the effect of axisymmetry we employed a database of 150 records with three components of ground motion. The results show that an 106/106 combination rule, or more accurately a 1.12 amplification factor on the design spectrum in a single direction, rather than the 1.04 implied by the 100/30, is adequate to account for the effects of axisymme-try. Still, this value depends on the definition of the underlying design spectrum, and whether, e.g., the maximum, arbitrary or geometric mean component is employed, which should be accounted for in all calculations.","PeriodicalId":66281,"journal":{"name":"地震工程与工程振动","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75044280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COMPARATIVE ANALYSIS AMONG DIFFERENT ANALYSIS PROGRAMS FOR SEISMIC VULNERABILITY EVALUATION OF A MASONRY BUILDING COMPOUND IN THE DISTRICT OF NAPLES 那不勒斯某砖石建筑小区地震易损性评价不同分析方案的比较分析

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8497.19272

G. Vaiano, A. Formisano

引用次数: 0

ASSESSMENT OF THE SHEAR PROPERTIES OF HDRBS UNDER DIFFERENT COMPRESSION LEVELS 不同压缩水平下HDRBS抗剪性能评价

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8712.20758

E. Bruschi, Emanuele Gandeli, Carlo Pettorusso, Virginio Quagliini

{"title":"ASSESSMENT OF THE SHEAR PROPERTIES OF HDRBS UNDER DIFFERENT COMPRESSION LEVELS","authors":"E. Bruschi, Emanuele Gandeli, Carlo Pettorusso, Virginio Quagliini","doi":"10.7712/120121.8712.20758","DOIUrl":"https://doi.org/10.7712/120121.8712.20758","url":null,"abstract":"Despite it is well known that the shear properties of High Damping Rubber Bearings (HDRBs) are affected by the instantaneous compression load developed during the seismic ground motion, only permissible variations of their design properties with frequency, temperature and ageing are prescribed in the standards while the influence of the compression level is usually disregarded. Within this framework, this research addresses this drawback through both experimental and numerical investigations. In the first part of the study, small scale laminated isolators are tested on a custom biaxial machine in order to assess the secant modulus, and damping factor of the elastomeric compound under different compression levels. In the second part, the same phenomenon is investigated through cyclic shear tests on full scale HDRBs under three different levels of axial load. In the last part, a 3D finite element model of the isolator is eventually formulated in Abaqus FEM software. The mechanical response of the elastomer is simulated by means of a hyperelastic strain energy function combined with a relaxation function. The experimental results highlight the substantial influence of the axial load on the damping capacity of the elastomer, while the shear modulus is less affected. The numerical analyses demonstrate that the vertical – horizontal coupled response of HDRBs can be accurately predicted, within the proposed formulation, with constitutive parameters estimated from simple uniaxial tests.","PeriodicalId":66281,"journal":{"name":"地震工程与工程振动","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76753522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

INVESTIGATING THE OVERTURNING STABILITY OF UNANCHORED CONTAINERS WITH FINITE ELEMENT SIMULATIONS 用有限元模拟方法研究无锚集装箱的倾覆稳定性

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8855.19088

S. Gkatzogiannis, P. Knoedel, T. Ummenhofer

引用次数: 1

EXPERIMENTAL INVESTIGATION ON ANCHORAGE PERFORMANCE OF EMBEDDED SMOOTH REBARS SUBJECTED TO CYCLICNG LOADING 循环荷载作用下预埋光滑钢筋锚固性能试验研究

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8556.19161

A. Paderno, Simone Pelucco, M. Preti

引用次数: 1

GEOMETRIC PATTERNS AND DYNAMICS OF FOLDABLE MODULI FOR ADAPTIVE FAÇADES 自适应可折叠模的几何模式和动力学faÇades

地震工程与工程振动 Pub Date : 2021-01-01 DOI: 10.7712/120121.8604.19155

Veronica Abbate, E. Babilio, F. Amarante dos Santos, N. Singh, F. Fraternali

引用次数: 0