Lora Raycheva

Lora Raycheva
University of Architecture, Civil Engineering and Geodesy · Department of Steel, Timber and Plastic Structures

Dr. Eng.

About

6
Publications
1,652
Reads
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7
Citations
Citations since 2017
6 Research Items
7 Citations
20172018201920202021202220230.00.51.01.52.02.53.0
20172018201920202021202220230.00.51.01.52.02.53.0
20172018201920202021202220230.00.51.01.52.02.53.0
20172018201920202021202220230.00.51.01.52.02.53.0

Publications

Publications (6)
Article
Full-text available
TWO-STOREY CONCENTRICALLY BRACED FRAMES WITH BRACES INTERSECTING A FLOOR BEAM. SPECIFICITIES CONCERNING SEISMIC DESIGN L. Raycheva , Tzv. Georgiev Keywords: seismic behaviour, concentrically braced frames, design issues, Split-X ABSTRACT Concentrically braced frames (CBFs) are one traditional structural system for bearing horizontal loads, inclu...
Conference Paper
Full-text available
Modern societies need built-up environment and once built, the buildings are in operation for 25, 50, 70, 100 and even more years. Thus, the ratio between the numbers of new constructions created according to the latest advances in engineering science and construction technologies and existing older generation constructions is always and worldwide...
Conference Paper
Full-text available
Split-X concentrically braced frames (Split-X CBFs) are often applied in building structures as a primary seismic resistance system. The initial association with the contemporary X-CBFs turns out to be misleading. The difference in Split-X CBF's behaviour when exposed to strong earthquakes initiates from the existence of seismic mass in the interme...
Conference Paper
Full-text available
The current paper presents a characteristic aspect of cyclic non-linear behaviour of steel concentrically braced frames with braces, intersecting into a floor beam (Split-X CBFs). Through experimental programme three test specimens of one-bay one-storey Split-X CBF with braces of H-cross section were tested under fully reversed cyclic constant ampl...
Article
Full-text available
Concentrically braced frames with X-bracing configuration (X-CBFs) are one of the most popular systems for seismic resistant design. Their ductile behaviour is provided primarily by yielding of braces in tension and to a small extent by plastic rotation in buckled braces. An improved CBF configuration by introducing bracings with modified sections...
Conference Paper
Full-text available
Concentrically braced frames with crossed diagonals (X-CBFs) are a popular and traditional system in seismic resistant design. Their energy dissipation capacity is primarily provided by yielding of braces in tension and buckling in compression. An improved CBF configuration by introducing bracings with modified sections, resulting in low cycle fati...

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Projects

Projects (4)
Project
All Dear Colleagues – Collaborators and Their Laboratories are invited to attach to this project Their old, new and future works or messages about Stability of Structures, especially: buckling, wrinkling, crimpling, crumpling ... and their energy absorption as well as about dynamic stability, slope stability .. of axially and non-axially loaded structures like columns, tubes, pipes, beams, plates, boxes, tanks, silos, pales, poles, pillars, conical shells, thin-walled structures as well as nanostructures, foams, gels.. et cetera .. made of metals, wood, plywood, bamboo, bones, composite, laminate, glass, ceramic, gypsum, concrete, rock, brick .. et cetera .. If any RSGate Member wants to be added to the project as the Collaborator (at least a co/authorship of one work about the stability and following of 50 Members of the Project would be required), He needs to be a follower of a member of the project ... , sorry ... , but in another way, the system of the project doesn't recognize Him, and He can't be added ... Naturally, all Dear Colleagues–Collaborators are asked to add every Colleague, which works on the stability (at least the co/authorship of one work about the stability and following of 50 Members of the Project would be required) ... - and don't hesitate to invite them ... Dear Colleagues–Collaborators, I would like to thank You very much for Your current engagement in our Project, but let me allow to remind You what does mean "Collaboration" in the case of our Project, i.e.: 1. every Colleague–Collaborator of our Project should attach at least 1 work about "Stability of Structures" or a message about it, 2. every Colleague–Collaborator of our Project should follow each other (at least 50 Members of the Project), 3. every Colleague–Collaborator of our Project should read and recommend, if only would be so possibility regarding a scientific level of researches, all works with each other, 4. every Colleague–Collaborator of our Project should comment works to each other if only would be a reason to do that - comments naturally may be critical but with respect to authors, 5. every Colleague–Collaborator of our Project should cite each other - if only would be so possibility regarding research works of each one, i.e. in every new work attached to our Project should be cited a big number, e.g. 100 (a minimum number: 50) works of Collaborators of our Project, 6. every Colleague–Collaborator of our Project should collaborate and write common (with the Collaborators as co-authors) papers, books, ... and other kinds of works, if only would be so possibility, 7. if any Colleague–Collaborator of our Project has a possibility to help to publish works about "Stability of Structures" (e.g. as a member of a scientific journal or publishing house editorial board) should give massage about it in the "goal of the project" or in "updates" in our Project, 8. if any Colleague–Collaborator knows about a conference with "Stability of Structures" as a panel or topic - He should inform us in the "goal of the project" or in "updates" in our Project ... I hope that the above rules of our Project would help us to get success in our scientific work ... , every one of us would like that His work would be noted, read, recommended, commented, discussed, and cited ... , but somebody should do that ... Simultaneously I would like to note that renunciation of the rules of the Project, can be taken by other Collaborators as a kind of dishonesty, especially when a Collaborator would like to obtain a lot of "Reads", "Recommendations" and "Citations", but self doesn't take any so activity .