Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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***the answer was between 339.5 and 342.5*** but I don’t understand how. Question: Consider a 7-story buildings with a total plan area BxL. In which B=125ft and L=60ft . The average weight of each floor and roof are 95 Ib/ft and 75 lb/ft?, respectively. The 84 ft-tall building is located in a seismic region with SDs =1.6 g and SD1 =0.5g for a building supported on rock, where g is the gravitational acceleration. The structure of the building consists of steel moment frames (all joints are rigid) that have an R value of 8. The importance factor I=1.0 Determine the total design seismic force (kips) acting at the base of the building ( seismic base shear in kips). ***the answer was between 339.5 and 342.5*** but I don’t understand how
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Where did the 2.58 come from? Ta went from 0.7 to 0.6
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Where did the 2.58 come from? Ta went from 0.7 to 0.6
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- Given: Figure 1 shows the cross section of a highway bridge barrier that is constructed fromplain concrete with gravel aggregate.Find: weight per foot of length of the barrier.arrow_forward12.7 The lateral force that is generated during building shaking can be calculated with the equation: Force = mass x acceleration, Based on this, which one of the following statement(s) is correct? ⚫ A building's total seismic design force is proportional to its weight. ⚫ Seismic forces are applied at the ground level; therefore, a building's upper floors have very small seismic force. ⚫ The largest seismic force is generated at the upper floors where they have the highest acceleration. . Seismic protective devises that dampen (reduce) building acceleration may be used to reduce the building seismic force. 12.8 Given five-story building, that weighs a 100kips and has concrete shear walls and special moment-resisting frames: a) Determine Response Modification Factor, R, from ASCE 7, Table 12.2-1 for Dual System of Special Moment Frame and Special reinforced concrete shear wall (Type D-3) b) Calculate Seismic Base Shear (V) using the following ASCE 7 equations and building information:…arrow_forwardThe floor system of a residential building consists of 125mm thick reinforced concrete slab (unit weight =23.6KN/m^3) resting on the three 8m spanned RC floors beams spaced at 3.2 meters on center. Size of RC beam is 200mm x 450mm. NSCP 2015 load factors: 1.2 DL &1.6LL. Assume simple supports. Calculate the unfactored beam self-weight in KN/m? express your answer in 2 decimal places.arrow_forward
- A concrete building has 12 stories, each story is 3.2 m high. The facade column has 400 kN axial load per floor and a cross sectional area of 300mm×700mm. Calculate the shortening of the column at the ground floor level and the sixth floor when using concrete f'c= 25 N/mm and 40 N/mm?. Explain if there will be any effect on the facade.arrow_forwardUse the ASCE 7 equations for building vibration period and base shear and calculate the design base shear for the following building. Building information: Building height:Location:Function:Total building weight:Structural system: 160-ft tallSanta Monica, CA (Seismic Design Category E)Hospital (Importance factor, I =1.5)7,400 kipsSteel eccentrically braced frame (R= 8)arrow_forward10 The interior live load for residential house is 1.90kPa while offices is 2.4kPa. As future engineers will it be wise to design the residential house with a live load of 2.40kPa? a. if yes why? b. if no why?arrow_forward
- Wind can produce very high drag loads on high-rise bulidings. Since calculating the áow around a buildingis quite diffcult, you decide to perform an experiment to find the drag on the nearly completed Mirabellabuilding at Univesity Drive and Myrtle Avenue in Tempe. The building is 250 ft tall and approximately 210ft wide (at its widest part) A) determine the drag on the Mirabella building for a sustained wind speed of 40 mph. Supposethat the temperature remains the same both inside and outside of the wind tunnel test section. If theatmospheric pressure is 100 kPa, what would the pressure have to be inside the tunnel test section tomaintain dynamic similarity between the model and the full-scale building? (You may assume that thetunnel is operating at maximum speed.arrow_forwardUse the ASCE 7 equations for building vibration period and base shear and calculate the design base shear for the following building. Building information: Building height:Location:Function:Total building weight:Structural system: 160-ft tallSanta Monica, CA (Seismic Design Category E)Hospital (Importance factor, I =1.5)7,400 kipsSteel eccentrically braced frame (R= 8)arrow_forwardDefine the term "moment redistribution" and critically compare the conventional elastic method with moment redistribution method that are used in the analyse of concrete frame structures under design action.arrow_forward
- List the different types of seismic waves produced during an earthquake event, and relate each type to the potential for causing building damage.arrow_forwardProblem 2 4" For the problem below, 600 lb (1) Plot V&M diagram using graphic method (2) Calculate shear stress 300 Ib/ft Tm and tn at 8' from A (3) Plot shear stress B 200 lb/ft DA 8" 10' 5' distribution at 18' 6' 900 lb 1500 lb from A 1" Note: the uniformly distributed load 200 lb/ft is upwards and 300 Ib/ft is downwards 5600 ft-lb 3500 ft-lbarrow_forward
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