In-Class Activities • P/A Quiz • Design philosophy for seismic resistant design • Needs for strength, ductility and stiffness • Causes of damage • Concept quiz . DUE TO EARTHQUAKES Prof. Dr. Güney Özcebe TED University Ankara. It is concluded that earthquake-resistant design in Mexico have evolved in refinement and complexity. The evolution of seismic codes and practices in US and Mexico are briefly described and critically analyzed in the following sections. He is a member of ACI Committees 314, Simplified Design of Concrete Buildings; 369, Seismic Repair and Rehabilitation; and 374, Performance-Based Seismic Design of Concrete Buildings, He received his bachelor degree in civil engineering in 1990. The latter source is usually the only reliable one. This type of stretching of the ground can introduce significant lateral forces into foundation elements and built structures. El desarrollo de nuevos reglamentos de diseño de estructuras sismorresistentes ha hecho posible que se garantice un mejor comportamiento de los edificios cuando éstos son sometidos a acciones sísmicas. Calculating and designing Lateral Force Resistance Systems (LFRS) for Wind and Earthquake Forces in Light Frame Construction 2012 Instructor: George E. Thomas, PE PDH Online | PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658 Phone & Fax: 703-988-0088 www.PDHonline.org www.PDHcenter.com An Approved Continuing Education Provider. Ingeniería Investigación y Tecnología, XV, 01 (2014): 151-162. Due to his contributions to seismic design of low-rise housing, he graduated with honors from UNAM. He received his M.Sc. Buildings will shift left and right during the event, and, if not built properly, will quickly destabilize. earthquake ground motion and is equal to the addition of 0.50 Ca I D to the dead load effects D Ωo = seismic force amplification factor as given in Table (A-4), and accounts for structural over-strength r = redundancy factor, to increase the effects of earthquake loads on structures with few lateral force resisting elements, given by rmax Ag 6.10 When designing earthquake-resistant buildings, safety professionals recommend adequate vertical and lateral stiffness and strength – specifically lateral. An earthquake can happen anytime, anywhere and without us knowing beforehand. degree in civil engineering from the same university. Lateral movement occurs when earthquake shaking causes a mass of soil to lose cohesion and move relative to the surrounding soil. The development of new codes for earthquake-resistant structures has made possible to guarantee a better performance of buildings, when they are subjected to seismic actions. However, a lateral movement can also stretch the ground as it moves – this is known as lateral spread. and Ph.D. degrees and graduated with honors from Universidad Nacional Autónoma de Mexico, UNAM in 2002. Analysis of the Earthquake-Resistant Design Approach for Buildings in Mexico. Por tanto, es conveniente que los reglamentos actuales de diseño de edificios sean conceptualmente transparentes, en cuanto a la definición de los factores de modificación de resistencia y en la forma de evaluar los máximos desplazamientos laterales, de tal manera que los ingenieros estructurales puedan comprender claramente el proceso de diseño. That is why it is very important that the building we are living in is reliable and resistant to earthquakes. Lateral spread can cause severe damage to a foundation unless it is reinforced to withstand the movement. When lateral spreading occurs, the ground tears, opening surface cracks and fissures across the slope. Earthquakes happen less frequently than other natural disasters, but building earthquake-resistant buildings protect against all natural disasters. Therefore, it is convenient that current codes for design of building become conceptually transparent when defining the strength modification factors and assessing maximum lateral displacements, so that the design process can be clearly understood by structural engineers. Free online marketing for BUILK contractors. 30th Street, Bonifacio Global City, Taguig City, Philippines, 1635, BUILK, Helpful for contractors! A stable foundation is a major characteristic of building a large structure regardless of natural disaster risks. Lateral movement can be entirely horizontal and occur on flat ground, but it is more likely to occur on or around sloping ground, such as adjacent to hillsides and waterways. In most cases, lateral movement involves an intact block of land sliding downhill – a phenomenon called a block slide or bulk lateral movement. In its technical guidance Repairing and rebuilding houses affected by the Canterbury earthquakes, MBIE states that, if the floor plate of the dwelling is not strong enough,  lateral spreading may cause an extension of the floor plate (that is, the concrete floor slab may crack or the timber floor may fracture generally at joints between framing members). www.PDHcenter.com PDH Course … Structures tend to handle the vertical movement caused by quakes better than the lateral, or horizontal, movement. Copyright © 2020 Elsevier B.V. or its licensors or contributors. BUILK covers all needed activities, from the planning process, record and track all the financial activities until the automatic cost evaluation report. "Lateral stiffness and strength are the key ingredients to make buildings 'earthquake safe.' The program is suitable for the contractor business, SMEs construction project owner and also the real estate developer. Analysis of the Earthquake-Resistant Design Approach for Buildings in Mexico, Análisis del enfoque de diseño sismorresistente para edificios en México. Structures tend to handle the vertical movement caused by quakes better than the lateral, or horizontal, movement. You can receive real-time project information anywhere and anytime. In the case of an unreinforced concrete floor slab, it is likely to crack in several places perpendicular to the direction of spread. The aim of this study is to analyze the transparency of earthquake-resistant design approach for buildings in Mexico by means of a critical review of the factors for strength modification and displacement amplification. Currently, she is professor, researcher and chief of the Department of Electronics at the Program of Technology in Electronics and Communications in the Faculty of Engineering at the Universidad Militar Nueva Granada in Colombia. Typically, the degree of lateral movement lessens as the distance from the waterway increases. Safety professionals advise equally distributing mass and strength throughout the structure so strength isn’t solely reliant on one factor. Lateral Load Capacity of Piles M. T. DAVISSON, Department of Civil Engineering, University of Illinois, Urbana Pile foundations usually find resistance to lateral loads from (a) passive soil resistance on the face of the cap, (b) shear on the base of the cap, and (c) passive soil resistance against the pile shafts. As a result, a section of ground moves relative to its original position. Lateral spreading near a waterway can cause damage to the surrounding land and the buildings it supports. Copyright © 2014 Universidad Nacional Autónoma de México. El propósito de este estudio es analizar la transparencia del criterio de diseño sismorresistente para edificios en México, a partir de una revisión crítica de los factores de modificación de resistencia y de amplificación de desplazamiento. Además se demuestra que el procedimiento especificado en dichos reglamentos permite determinar la resistencia de diseño y los desplazamientos en una forma más racional, congruente no sólo con el estado actual del conocimiento, sino con las tendencias contemporáneas de los reglamentos de edificios. Se concluye que los reglamentos de diseño sismorresistente en México han evolucionado en refinamiento y complejidad. By continuing you agree to the use of cookies. While you plan to build earthquake-resistant projects, try using BUILK to help you control your cost for free.BUILK Cost control is free software designed especially for SMEs construction business. He worked for 6 years as a design engineer, designing various reinforced concrete structures. Possibly one of the most important safety characteristics when designing for safety, redundancy ensures there are multiple strategies in place in case one fails. If the structure is not comprehensively tied together, components will move independently and collapse will be imminent. Por otro lado, los procedimientos utilizados en los reglamentos de EU podrían no proporcionar una visión clara para la evaluación de la respuesta sísmica de edificios. The continuous load path is the earthquake’s journey through the building – laterally and vertically. Here are some good advice for contractors according to “5 Tips to Building an Earthquake-Resistant Structure” by Eastern Kentucky University. Buildings in the middle of the block sustain little damage while those located at the edges of the zone of movement exhibit irreparable damage. When designing earthquake-resistant buildings, safety professionals recommend adequate vertical and lateral stiffness and strength – specifically lateral. It is vital the path is intact or else it won’t be able to dissipate an earthquake’s powerful shudders. Además se analiza el enfoque de los reglamentos de diseño de edificios en Estados Unidos. Email: robert@builk.com, 5th Avenue Cor. Multiple points of strengths and redundancies share the force instead of the quake splitting the foundation apart. Lateral movement occurs when earthquake shaking causes a mass of soil to lose cohesion and move relative to the surrounding soil. The effect is caused by a slope failure on a hillside that is not underlain by liquefied soils. Analysis of the Earthquake-Resistant Design Approach for Buildings in Mexico. They have to appreciate multiple factors they may not be experts in and communicate with other professionals to find the most effective solutions. Hernández's research interests include but not limited to seismic analysis and design of highway bridges, laboratory testing of reinforced and prestressed concrete members. This is the continuous load path characteristic that safety professionals, architects, and engineers must remain wary of during design. It is critical for a building’s long-term survival, and a stronger foundation is necessary to resist earthquakes powerful forces. A block slide or bulk lateral movement occurs when a section of ground moves as a complete whole without any significant stretch, strain or change in local surface shape or characteristics. https://doi.org/10.1016/S1405-7743(15)30013-5. In a soft-story building, the lateral components were either never considered or they are just not strong enough to resist the imposed earthquake forces," explains Adan. Without considering earthquakes, professionals still focus on a building’s vertical stiffness and strength as it has to support itself. Thank you content from Eastern Kentucky University:  https://safetymanagement.eku.edu/blog/, Head Office: +63 2 8825 06111 As a result, the designed lateral strength can be lower than that required to maintain the structure in the elastic range. P/A Quiz Which one of the followings makes sense? In this situation, the weight of the soil block, often in combination with the destabilising effect of groundwater and/or seismic shaking, exceeds the shear strength of the ground. Lateral movement can be entirely horizontal and occur on flat ground, but it is more likely to occur on or around sloping ground, such as adjacent to hillsides and waterways. In contrast, the procedures used in US codes may not provide a clear view for seismic response assessment of buildings. Lateral ground displacement occurs when earthquake shaking causes a mass of soil to lose cohesion and move. It is also demonstrated that the procedure prescribed by such design codes allows the assessment of the design strengths and displacements in a more rational way, in accordance not only with the present stage of knowledge but also with the contemporary tendencies in building codes. ISO 690 citation style Carrillo J., Hernández-Barrios H., Rubiano-Fonseca A.