Hello, everyone,
I am currently designing a steel box girder, and I have some questions regarding the design of the diaphragm (plate type). Could you recommend any good references that explain the design of steel diaphragms according to AASHTO ?
I look forward to hearing from you.
Hello everyone,
I am currently designing a steel box girder, which includes longitudinal stiffeners in both the upper and lower flanges. The longitudinal stiffeners are welded on, with no transition radius. In the upper flange, two longitudinal stiffeners run continuously along the entire...
Hello everyone,
I am analyzing a curved ramp with three spans (36m, 45m, and 30m). The first two spans have a carriage width of more than 11.0 meters. However, between the second and third spans, there is a portion where the carriage width is less than 10.5 meters. In this regard, how many...
Hello everyone,
I was just curious about the reinforcement detailing in the hammerhead beam. Is there any particular reason for using diagonal reinforcement (please see the attached figure)?
Regards
Hi all,
I am trying to design a capping beam that meets the definition of a deep beam, with an a/d ratio of around 1.0. I am curious about the standard practice for designing such a beam in terms of shear and flexure. Is it mandatory to design the beam using the strut and tie model...
Hello everyone,
I am designing a three cell box culvert. I am trying to perform a live load analysis in the culvert to estimate the forces in the slab and wall. I have realized that unlike point loads in bridges, we need to apply the vehicular load as an area load due to live load dispersion...
Hi everyone,
I have a query with regard to general practice in applying wind load when the building consists of both monopitch and duopicth roof.
In such case, how do we calculate the value of "e" which is necessary in allocating zone length for applying wind load based on Eurocode. I am bit...
Hello everyone,
I am trying to desing the circular bridge pier. I applied the lateral force using the response spectrum analysis independently in X-axis, and Y-axis.As I wanted to gain confidence with the combination rule, I rotated the angle of attack and recorded the bending moment. When Eqx'...
Hello all,
I need to conduct a lateral load analysis of the drilled shaft, and for that, I must classify soil as either clay or sand. According to the geotechnical report, there are few soil layers which are desginated as GC and SC based on Unified soil classification system. I am unsure...
Hi everyone,
I'm currently in the process of estimating the axial capacity of a single drilled shaft. I've come across a situation where the bearing resistance of the drilled shaft is insufficient to counter the imposed load, regardless of the penetration depth. This was due to the contribution...
Hi everyone,
I have to design an irregular underground pit structure which supports rotating pump. I need to know the correct method of modeling pit using STAAD Pro connect edition.
At the moment, I am using plate-element to model all the walls and base slabs. For that, I need answers to the...
I am currently designing a simply supported bridge that utilizes double bent columns, and I need to consider earthquake design. I have a question regarding the use of the response modification factor as recommended by the code. Should I apply the response modification factor for multiple bent...
Hello everyone,
Can you please suggest a way to compute the length of the rebar that extends from the precast beam to the slab?
I have also attached the figure to clarify my question.
I will be grateful to have any guidelines or solved examples.
Thank you...
Hello all,
I wanted to check the tensile stress in the prestressed beam, and the AASHTO 5.9.4.2.2 clearly states that SERVICE III load combination should be used.
Apart from dead load and live loads, this load combination also consists of creep, shrinkage, uniform temperature, and temperature...
